Green Bank Observatory
Green Bank Observatory
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Alex McEwen (UMBC) - GBT 820 MHz Pulsar Survey: Discoveries and Follow-up
Abstract: Radio surveys have discovered more than 3000 widely-varied pulsars, all of which play an important role in understanding the population and as exotic laboratories for studies of gravitation and stellar evolution. The GBT’s sensitivity and flexibility make it an excellent instrument to search large regions of the Galaxy for new sources that continue to fill in gaps in our understanding of their behavior. In this talk, I will discuss results from the Green Bank 820 MHz pulsar survey of the Cygnus region of the Galaxy. This region has a rich stellar history, making it a prime target for a deep search for young pulsars. With a survey coverage of approximately 173 square degrees, the search detected six new pulsars, one of which is in a tight binary orbit (4.5 hour orbital period). Several of the sources have dispersion measures that place them at or beyond the maximum predicted for this line of sight, suggesting an underestimation of the electron density. For a subset of these, we make multi-frequency observations that allow for measurement of scattering in the pulse profiles, many of which are at the upper edge of predictions for their assumed distance. Aside from these interesting sources, I will discuss the survey’s sensitivity and the impacts of our results on Galactic modeling.
Переглядів: 148

Відео

David Stark - Using GBT HI observations to probe the origins of breakBRD galaxies
Переглядів 11828 днів тому
Abstract: Break Bulges in Red Disk (BreakBRD) galaxies are a population denoted by their blue star-forming centers and red quenched disks. They do not appear to follow the typical "inside-out" evolution of spiral galaxies, and they are ubiquitous across mass and environment, suggesting they may be driven by multiple physical mechanisms and/or be a fundamental phase of galaxy evolution. We used ...
Trey Wenger - Cool Diffuse Ionized Gas Revealed by Sensitive Radio Recombination Line Observations
Переглядів 8628 днів тому
The physical nature of the warm ionized medium (WIM) remains poorly understood despite its prevalence in the Galactic disk. Radio recombination lines (RRLs) are an extinction-free probe of the Galactic WIM. The Green Bank Telescope Diffuse Ionized Gas Survey (GDIGS) mapped RRL emission in a section of the Galactic plane and revealed a significant amount of high emission measure WIM plasma. Due ...
Priya Bangale (U.Delaware) - A 350 MHz Green Bank Telescope Survey of Unassociated Fermi-LAT Sources
Переглядів 116Місяць тому
We have searched for radio pulsations toward 49 Fermi Large Area Telescope (LAT) 1FGL Catalog gamma-ray sources using the Green Bank Telescope at 350 MHz. We detected 18 millisecond pulsars (MSPs) in blind searches of the data; 10 of these discoveries are unique to our survey. 16 are binaries, with eight having short orbital periods P_B of less than 1 day. No radio pulsations from young pulsars...
Carmen Choza - SETI Institute
Переглядів 1072 місяці тому
Abstract: Radio narrowband technosignatures have been a cornerstone of SETI efforts since the field's inception, dating back to Project Ozma in 1960. These signals remain a prime target due to their distinctiveness from natural astrophysical phenomena and their potential for efficient interstellar communication. Despite the emergence of new search modalities, narrowband radio SETI maintains its...
S. Choudhury (KASI) - Revealing infall onto the subsonic filaments of B5 core using NH3 observations
Переглядів 712 місяці тому
The study of star formation process requires an understanding of the individual properties and the interplay between different physical structures, such as molecular clouds, cores, and filaments. Due to the vast contrast in their densities, however, it is often difficult to observe these structures in a single tracer. NH3 inversion transitions are useful tracers for this purpose. Although the c...
Sanskriti Das: A deep search for missing accretion in the circumgalactic medium
Переглядів 924 місяці тому
The circumgalactic HI might hold the clue to the missing accretion: the mismatch between the HI accretion rate and star formation rate of local (z~0) galaxies. If it traces the neutral fraction of a predominantly ionized CGM, it could also host missing galactic baryons. Using the Green Bank Telescope, we probed the 21-cm emission from HI in the CGM of several local galaxies out to 100 kpc impac...
Scott Ransom (NRAO) The milli-second pulsars of the globular cluster Terzan 5
Переглядів 2064 місяці тому
Abstract: In the past five years, MeerKAT has found 11 new pulsars in the bulge globular cluster known as Terzan 5, bringing the total in Terzan 5 to 49, the most of any cluster. The amazing thing, though, is that we have been able to determine timing solutions for all of them using 20 years of archival GBT data on the cluster. Being able to determine "instant" decades-long timing solutions all...
2024, May 8 Science Community Webinar: Jack Orlowski-Scherer (UPenn)
Переглядів 3085 місяців тому
A Survey of Point Sources in Clusters of Galaxies, and Other Updates from MUSTANG-2 Abstract: Mechanical feedback from active galactic nuclei (AGN) is thought to be the dominant feedback mechanism quenching cooling flows and star formation in galaxy cluster cores. However, the mechanisms by which AGN couple to the intracluster medium (ICM) are not well understood. The nature of pressure support...
April 24, 2024 - Karen O'Neil (Green Bank Observatory) - A Galaxy Without Stars?
Переглядів 1945 місяців тому
A recent 21-cm survey by our team uncovered a new galaxy, J0613 52, which has an HI mass of ~109 Msun yet lacks any optical counterpart. Unlike all previously discovered "dark" HI clouds, through, J0613 52 is an isolated object with no known or visible companions within at least 30'. The galaxy's total mass and rotational velocity, as measured by the Green Bank Telescope, appear to defy current...
Chi Yan Law (Chalmers Univ. of Technology) - Polarized Light from Massive Protoclusters (POLIMAP)
Переглядів 716 місяців тому
Dissecting the role of magnetic fields in the massive infrared dark cloud G28.37 0.07 Abstract: Magnetic fields may play a crucial role in setting the initial conditions of massive star and star cluster formation. To investigate this, we report SOFIA-HAWC 214 µm observations of polarized thermal dust emission and high-resolution GBT-Argus C18O(1-0) observations toward the massive Infrared Dark ...
Patrick Taylor (NRAO) - Next Generation Planetary Radar with the Green Bank Telescope
Переглядів 2016 місяців тому
Abstract: The National Radio Astronomy Observatory, Green Bank Observatory, and Raytheon have partnered to design a next generation, high-power, high-frequency planetary radar system, dubbed ngRADAR. ngRADAR will use the 100-m Green Bank Telescope (GBT) to transmit and the ten 25-m antennas of the Very Long Baseline Array to receive. We will discuss the status of the concept design for the high...
Fast Radio Bursts: A Cosmic Mystery
Переглядів 5876 місяців тому
Fast Radio Bursts (FRBs) are one of the most exciting recent discoveries in the field of radio astronomy, and they were discovered by astronomers right here in West Virginia! Most FRBs happen faster than you can blink an eye, and in that time they blast out more energy than our sun produces in several days. Despite this spectacular behavior, we still don’t know what they are. Enjoy this recorde...
Rachel Friesen (University of Toronto) Dynamics in Star-forming Cores (DiSCo) with Argus on the GBT
Переглядів 3237 місяців тому
Abstract: The internal velocity structure within dense cores plays a crucial role in providing the initial conditions for star formation in molecular clouds. The kinematic properties of dense gas at sub-core scales (~ 0.01 - 0.1 pc) has not been extensively characterized, however, due to limitations in the ability to map line emission across cores with sufficient spatial and spectral resolution...
Jialu Li (UMD) - Argus/GBT Observations of Molecular Gas in the Inner Regions of IC 342
Переглядів 977 місяців тому
Abstract: Understanding the distribution, physical conditions, and dynamics of molecular gas is essential to understanding star formation. For this purpose, observing molecular clouds with a large spatial dynamic range is crucial. Argus, the 16-pixel focal plane array on the Green Bank Telescope (GBT), provides high spatial resolution (6-8'' at 3 mm) and sufficient sensitivity. In this talk, I ...
Paulo Freire (Max Planck Institute for Radio Astronomy)
Переглядів 1658 місяців тому
Paulo Freire (Max Planck Institute for Radio Astronomy)
Maria Drozdovskaya (Center for Space and Habitability (CSH), Universität Bern)
Переглядів 748 місяців тому
Maria Drozdovskaya (Center for Space and Habitability (CSH), Universität Bern)
Michael Busch - Detection of faint normal 18cm OH emission from CO-Faint Dark Molecular Gas in M31
Переглядів 1018 місяців тому
Michael Busch - Detection of faint normal 18cm OH emission from CO-Faint Dark Molecular Gas in M31
Michael Shull - The High-Latitude Interstellar Medium: Dust and Gas in the Galactic Halo
Переглядів 2 тис.9 місяців тому
Michael Shull - The High-Latitude Interstellar Medium: Dust and Gas in the Galactic Halo
12 Fast Radio Bursts, Dunc Lorimer, 08.10.2023
Переглядів 3069 місяців тому
12 Fast Radio Bursts, Dunc Lorimer, 08.10.2023
13 Role of Large Single Dishes VLBI, Pedro Salas, 08.11.2023
Переглядів 579 місяців тому
13 Role of Large Single Dishes VLBI, Pedro Salas, 08.11.2023
11 Radar Observing, Pat Taylor, 08.10.2023
Переглядів 1359 місяців тому
11 Radar Observing, Pat Taylor, 08.10.2023
10 Observing & Calibration Spectral Lines, Will Armentrout, 08.09.2023
Переглядів 169 місяців тому
10 Observing & Calibration Spectral Lines, Will Armentrout, 08.09.2023
08 Signal Processing Basics and Spectrometers, Ryan Lynch, 08.08.2023
Переглядів 649 місяців тому
08 Signal Processing Basics and Spectrometers, Ryan Lynch, 08.08.2023
09 Observing & Calibration Continuum, David Frayer, 08.09.2023
Переглядів 509 місяців тому
09 Observing & Calibration Continuum, David Frayer, 08.09.2023
07 Tracing the Signal, Ron Maddalena, 08.08.2023
Переглядів 299 місяців тому
07 Tracing the Signal, Ron Maddalena, 08.08.2023
06 Frontends, Steve White, 08.08.2023
Переглядів 469 місяців тому
06 Frontends, Steve White, 08.08.2023
05 History and Future of Radio Astronomy, Jay Lockman, 08.08.2023
Переглядів 1239 місяців тому
05 History and Future of Radio Astronomy, Jay Lockman, 08.08.2023
04 Molecular Discovery in Green Bank, Brett McGuire, 08.07.2023
Переглядів 599 місяців тому
04 Molecular Discovery in Green Bank, Brett McGuire, 08.07.2023
03 Radiation Fundamentals Spectral Lines, Natalie Butterfield, 08.07.2023
Переглядів 1019 місяців тому
03 Radiation Fundamentals Spectral Lines, Natalie Butterfield, 08.07.2023

КОМЕНТАРІ

  • @Duddylee
    @Duddylee 7 днів тому

    What would be the impact to matter in the path of heat/light/radiation. Then what about when the beams of the pulses imtersect.

  • @shiralhartley4657
    @shiralhartley4657 14 днів тому

    I'm looking for Kenah Dustionna Omarie Louk and Dustin Dailyn Darious Louk.

  • @shiralhartley4657
    @shiralhartley4657 14 днів тому

    They are listening to my thoughts and putting thoughts into my head and they can control me for a time fram

  • @ryanwalsh1480
    @ryanwalsh1480 3 місяці тому

    Down the frequency you can pick a certain time and understand it's fluence. Are there any fluence in the frb repeating similarly in other frequencies as well regarding frb121102

  • @thehillbillygamer2183
    @thehillbillygamer2183 6 місяців тому

    Unless you're looking for a near Earth asteroid that is going to crash into the Earth and blow people up in the next 5 years no one cares and most people don't care unless it's going to blow them up or somebody but they care about Ford's going to impact like the global you know food chain or cause them inconvenience in some way if it's going to blow up some Village in Indonesia that don't really make anything that they care about or use or anything and don't affect them they don't give a shit liberals that say they give a shit and act like that but they really don't give a shit most people just don't give a shit anymore the immediate family and what they want and you know they're conveniences in life the only thing they care about space is maybe they like watching Star Trek or the expanse and that's it

  • @thehillbillygamer2183
    @thehillbillygamer2183 6 місяців тому

    But they didn't have cell phones and Wi-Fi in the 1950s maybe the government did

  • @BracaPhoto
    @BracaPhoto 6 місяців тому

    I Still don't understand how you Observed and measured their velocity towards each other You say 7mm a day - is that an observed measurement or are you using the same formulas Einstein used to calculate it ??

  • @grhinson
    @grhinson 7 місяців тому

    Since the biggest take-away of the area is no spourious use of rf energy; Did the construction company have a waiver during the construction?

  • @arsenmilman7500
    @arsenmilman7500 8 місяців тому

    thank you!

  • @ieBrazil
    @ieBrazil 8 місяців тому

    Einstein and Aristotle were the greatest minds of all time that have ever existed in the known human history.

    • @cixelsyd-much4756
      @cixelsyd-much4756 8 місяців тому

      Newton did a lot more for math and physics than Einstein.

  • @saturnsparkys
    @saturnsparkys 9 місяців тому

    do you have any proof they should reappear by this year?

  • @mohammadpakravan9516
    @mohammadpakravan9516 Рік тому

    Great video and great description thanks 👍🎉

  • @jo-anne7504
    @jo-anne7504 Рік тому

    NYT article, "Losing Earth," made into a book. As pertinent now as it was in 2019. "Losing Earth: A Recent History," Nathaniel RIch, Farrar, Straus and Giroux ©2019

  • @ronaldsanchez1341
    @ronaldsanchez1341 Рік тому

    tHANK YOU; i'VE BEEN LOOKING FOR SIMILAR FOR 10 YEARS!

  • @ronaldsanchez1341
    @ronaldsanchez1341 Рік тому

    tHANK YOU; i'VE BEEN LOOKING FOR SIMILAR FOR 10 YEARS!

  • @ronaldsanchez1341
    @ronaldsanchez1341 Рік тому

    tHANK YOU; i'VE BEEN LOOKING FOR SIMILAR FOR 10 YEARS!

  • @rayhill1855
    @rayhill1855 Рік тому

    This is beyond stupid move the damn site to the north or south pole or somewhere no one lives. In the highly congested east coast location affecting millions of people is total BS.

  • @millerbrenda1149
    @millerbrenda1149 Рік тому

    We're they able to save the telescope I want to move there because I want to get away of electromagnetic fields please save the quite zone and the telescope

  • @ronaldpokatiloff5704
    @ronaldpokatiloff5704 Рік тому

    Earth is the only place for life which must come from a computer

  • @gizmothewytchdoktor1049
    @gizmothewytchdoktor1049 2 роки тому

    downloaded...thanks! you folks need a hand with the audio? willing to lend one i am.

  • @tetkinsin
    @tetkinsin 2 роки тому

    Bad audio guys !

  • @kendallgraves4950
    @kendallgraves4950 2 роки тому

    🤭 ░p░r░o░m░o░s░m░

  • @wisdomlistens2579
    @wisdomlistens2579 2 роки тому

    Thank you for taking the time to share this information with the general public

  • @nolaemerson5074
    @nolaemerson5074 2 роки тому

    𝚙𝚛𝚘𝚖𝚘𝚜𝚖 🙂

  • @tombouie
    @tombouie 2 роки тому

    Well Done

  • @sambassett417
    @sambassett417 2 роки тому

    Could you make some more videos about pulsar detection?

  • @davidrandell2224
    @davidrandell2224 2 роки тому

    One or two agreements with Einstein out of hundreds is not enough to draw such conclusions as conclusive. Try again.

  • @osue69
    @osue69 2 роки тому

    A short playlist inspired by this video. ua-cam.com/video/tA10XayhSOM/v-deo.html ua-cam.com/video/TgH9KXEQ0YU/v-deo.html ua-cam.com/video/XRr1kaXKBsU/v-deo.html ua-cam.com/video/fQmn3lzJIZ4/v-deo.html

  • @tobystewart4403
    @tobystewart4403 2 роки тому

    There are a lot of folks claiming to bolster the old theory of special relativity. No so many, claiming to bolster the theories of Maxwell. Possibly that is because Maxwell's theories are self evidently true, after more than 150 years of practical development of material products that harness the observable characteristics of Maxwell's work. I mean, if you were to produce a youtube video titled "Double pulsars reinforce Maxwell's theory of electromagnetic force", everyone would look at you like you were strange. Why do we need to bolster Maxwell's theories, especially with highly speculative ideas about things that are far, far away, about which we know very little? Special relativity demands that you consider time and space variable, and yet also entertain the constant "C", the speed of light. Never mind that speed is space divided by time, both of which are apparently variable.

    • @ewqdsacxz765
      @ewqdsacxz765 2 роки тому

      Maxwell's theories are not self-evident, but extremely strong, stronger than Einstein's. The latter, however, includes the so-far strongest-performing theory of gravity, having been inspired as an analogy to Maxwell's theory of classical (non-quantum) electrodynamics. If something is self-evident, it's not physics, but instead something speculative (non-observational) such as mathematics or philosophy or art. Since Popper's philosophical contribution to scientific methodology, it's generally been accepted as a gold standard that a theory must be recognized as falsifiable (and therefore non-self-evident) before it can be recognized as scientific theory.

    • @tobystewart4403
      @tobystewart4403 2 роки тому

      @@ewqdsacxz765 You are right, I used the wrong term "self evident". What I was talking about is actually all the evidence accumulated since the theory, which is perhaps the opposite of "self evident". It's all the evidence other than the theory itself. The "evidence" of special relativity is contrived mathematics, rather than practical implementations of the theory in the real world. There is nothing made by humans that needs special relativity to work. By stark contrast, nearly everything in the modern world depends on engineers who understand Maxwell's work on electromagnetism. As for "gravity", Einstein's theory is magical. Space and time are variable, yet united by a constant that is a speed. Speed being space divided by time. You can pretend that this makes sense. Many do.

  • @JoeDeglman
    @JoeDeglman 2 роки тому

    When you look at images of the Vela and Crab Nebula Pulsars, they tell a completely different story. The pulses are actually detected in Xray and Gamma, the same EM signature as lightning strikes. Evidence from Vela and Crab Nebula Pulsars tells the story of an electrical discharge at one pole of the remnant core. From the Xray images it appears that electrons flow into one pole and positrons into the other. The Gamma pulses appear to be a charged particle recombination scenario in which positrons discharge to electrons around the core from a plasmoid hovering above one pole.

  • @pulsarecho1952
    @pulsarecho1952 2 роки тому

    Interesting.

  • @timefactortheoryofgravitya7578
    @timefactortheoryofgravitya7578 2 роки тому

    Einstein originally thought of Time-Space but conceded that Space-Time is easier to understand. Time-Factor-Theory. Click the big T to the left!

    • @jonathanjollimore7156
      @jonathanjollimore7156 2 роки тому

      It's a lot simpler then people think

    • @JoeDeglman
      @JoeDeglman 2 роки тому

      Space and time are creations of man, just like the hypothetical neutron stars. Something that has no physical makeup to it cannot be bent or curved. Time dilation actually emerges from the math errors in Einstein's derivations. When those errors are corrected no such time dilation that emerges from the derivations.

  • @DannyVega1
    @DannyVega1 2 роки тому

    Thank you for the explanation!!

  • @spirocorbett3839
    @spirocorbett3839 2 роки тому

    a load of absolute BS

  • @spirocorbett3839
    @spirocorbett3839 2 роки тому

    THE GREAT TESLA ON EINSTEIN & RELATIVITY "Einstein is a beggar dressed in purple clothes and made king using dazzling mathematics that obscure truth"... "Relativity is a massive deception wrapped in a beautiful mathematical cloak.” "The theory of relativity is a mass of error and deceptive ideas violently opposed to the teachings of great men of science of the past and even to common sense." "The theory, wraps all these errors and fallacies and clothes them in magnificent mathematical garb which fascinates, dazzles and makes people blind to the underlying errors. The theory is like a beggar clothed in purple whom ignorant people take for a king. Its exponents are very brilliant men, but they are metaphysicists rather than scientists. Not a single one of the relativity propositions has been proved." ~Nicola Tesla Tesla's most scathing condemnation of the Marxist charlatan was penned in a 1934 poem entitled 'Olympian Gossip', written to a friend. In the poem, Tesla sarcastically mocks Einstein and calls him a "long haired crank". An excerpt: While listening on my cosmic phone I caught words from the Olympus blown. A newcomer was shown around; That much I could guess, aided by sound. "There's Archimedes with his lever Still busy on problems as ever. Says: matter and force are transmutable And wrong the laws you thought immutable." Too bad, Sir Isaac, they dimmed your renown And turned your great science upside down. Now a long haired crank, Einstein by name, Puts on your high teaching all the blame. Nicola Tesla

    • @JoeDeglman
      @JoeDeglman 2 роки тому

      Right the newer radio telescopes actually debunk GR and SR in many ways There is no evidence that rotation speed of a pulsar has anything to do with pulse rate. For the core to rotate at the speed of a dental drill, is ridiculous. Pulsars are detected with Gamma, which is also the same EM signature of lightning strikes. These pulsars should be detectable from all angles, not rotating like a light house. There is evidence from images of Vela and Crab Nebula Pulsars that there is an electrical discharge between the remnant core and a plasmoid that forms above one of the poles of the remnant core.

  • @mmerx
    @mmerx 2 роки тому

    There are a lot of smart people in the world... why don't any of them work in Washington?

  • @guribuza2007
    @guribuza2007 2 роки тому

    I swear he said “devil pulsar system”.

  • @DavidDobr
    @DavidDobr 2 роки тому

    Amazing visuals

  • @dogshake
    @dogshake 2 роки тому

    Do you have to spend a lot of time/effort in future proofing? I'd imagine that as the number of wireless signals increase, as well as their strength, youd have to plan 10+ years ahead, possibly even work in conjunction with IETF.

  • @sambassett417
    @sambassett417 2 роки тому

    What programming laungage is VEGAS written in? Do you think I could get a copy of the code?

  • @sambassett417
    @sambassett417 2 роки тому

    Do you think I would be able to get any more specific stuff on the GBT's hardware and software? like circuitry and voding and stuff like that?

  • @dichebach
    @dichebach 3 роки тому

    In before this goes viral! Seriously though, great stuff! Amazing!

  • @AMFUNNYMEDIA
    @AMFUNNYMEDIA 3 роки тому

    Wow

  • @loveashed28
    @loveashed28 3 роки тому

    Great video tanks for uploading it. Could you please make more videos about the actual radio telescope? It would be awesome.

  • @nebuladus7850
    @nebuladus7850 3 роки тому

    Hello cant wait for tours✌🏽📡💛

  • @nebuladus7850
    @nebuladus7850 3 роки тому

    Hello💚📡💚🧚🏽‍♀️

  • @nebuladus7850
    @nebuladus7850 3 роки тому

    Fascinating✌🏽