TYSM for sharing your journey!! i am starting my undergrad bsc in planetary exploration in a couple weeks and im so excited for all the future research so thanks for showing us what that looks like :) more sciency parts pls! also i love pip
Best of luck in your undergraduate journey! Planetary exploration is causing all the rave in astronomy these days with so many new instruments going on sky, so you've joined just in time!! Also everyone in the office loves Pip as well 😆
I’m an astronomy grad student in South Africa and my friend (who is also my officemate) has that Lego set by her desk! 😄 Also have a question: in what form does the gas you’re looking at exist? HI and maybe HII, I’m guessing? If HI, and I’m just thinking out loud here, is there anything that precludes centimetre Very Long Baseline Interferometry experiments to compare the gas proportions in the different regions of galaxies with those predicted by your simulations? If it’s possible for HI, then possibly HII as well but I’m not sure where its strongest spectral lines lie in terms of frequency.
@@senkhosisimelane7534 wow our lives are slightly parallel from across the world! 😆 to answer your question my simulation includes both neutral and ionized hydrogen! The balance between the two depends on the temperature , density, and radiation fields of the galaxy. The gas you see in the video are most likely ionized as they’ve experienced shock from being hit with radiative feedback. I believe there are some studies in cm VLBI to compare gas proportions, but I haven’t taken the time to look at it in great detail 🙈 emission lines of ionized hydrogen are too faint in cm wavelengths so I don’t think it’s observable with VLBI. However, its strongest emission lines are in the optical and UV! As for neutral hydrogen with VLBI I think it may be feasible but I’m not too sure at what wavelength. I know that HI can be INCREDIBLY faint across many wavelengths so it may take a very high dense region to produce emission at all.
@@ogeokoronkwo Ah, cool! Thanks for the info - my work isn’t on gas components of galaxies so you’ve taught me something today! MeerKAT has been doing well in detecting 21cm HI lines (not sure out to what redshift but I think in the nearby universe) but I don’t know if has the spatial resolution on its own to enable comparison of gas proportions. My guess would be no. But with SKA-1-Mid coming up and plans to do include it in VLBI observations, that will probably transform the sensitivity of high-resolution imaging experiments in the cm wavelengths. Of course, this is too far into the future to be of immediate interest to you now, but what are scientists if not dreamers? 😄 Recently discovered your channel and I’m enjoying seeing how other students work and how the culture is in different groups and departments. Thanks for sharing your journey!
MeerKAT is mainly limited to the nearby universe. However tools like JWST and ALMA are great for galaxies out to redshift 6! My second project actually focuses on using statistical methods to calculate molecular gas mass fractions at higher redshifts, and all of my data thus far is from ALMA! Hoping to make a full video about this project around December if for those interested. Thanks for the great questions and for following along with my content!!! Keep up the great work in SA :)))
Love your office space! Ok had to edit because I had to nerd out. How are you integrating HDM (Hot Dark Matter) and CDM (Cold Dark Matter) into your models? Not going to get into the weeds but as an aspiring computational astrophysicist and older college student I find it interesting.
Great question, but sadly my answer is quite boring 🙈 In the models that I use, we don't integrate hot and cold dm. Our subgrid model follows the Lambda CDM model. So it's simple, but effective. I don't know if anyone in my collaboration group is working on incorporating HDM now or in the future. Although I think it would be interesting to analyze the two and compare!
@@ogeokoronkwo That could be my thesis when I eventually end up as a PhD student: A Comparative Analysis of Hot and Cold Dark Matter Integrations in ΛCDM Cosmological Models
@@ogeokoronkwo I want you to know that you really inspired me and I have a “working” thesis. I really hope I don’t come off as weird, lol. I have not taken any physics classes yet since I’m focusing on finishing my CS degree. With the help of ChatGPT and my own research I came up with this: 1. Introduction • Introduce the need for a comprehensive dark matter model integrating both HDM and CDM, while highlighting how PBHs could serve as a novel dark matter candidate. 2. Literature Review • Review existing ΛCDM models, focusing on their treatment of CDM and the neglect of HDM. • Include a section on PBHs, summarizing their theoretical basis and potential as dark matter candidates. 3. Theoretical Framework • Develop the mathematical models for HDM and CDM integration. • Provide equations governing PBH formation and long-term stability due to quantum effects. 4. Methodology • Detail your computational approach, including N-body and hydrodynamical simulations. • Discuss the specific software and tools you’ll use, like GADGET-2, and any custom code development. 5. Simulations and Results • Present the results of your simulations, focusing on galaxy formation and structure evolution. • Include visualizations (e.g., graphs, 3D models) to illustrate the impact of HDM and PBH on large-scale structures. 6. Discussion • Compare your findings with existing observational data, focusing on the CMB and large-scale structure. • Discuss the implications of quantum-scale PBHs for dark matter models. 7. Conclusion • Summarize the key insights from your comparative analysis of HDM and CDM in ΛCDM models. • Highlight the potential of PBHs as an alternative dark matter candidate.
This was a really fun video! I LOVED hearing more about your research and I love the "sciency" aspect :D Also, HI PIP!!!
@@hasema15 Pip says hi!
I'm not being dramatic when I say that Pip's tour changed my life
@@valeriaH223 LITERALLY
TYSM for sharing your journey!! i am starting my undergrad bsc in planetary exploration in a couple weeks and im so excited for all the future research so thanks for showing us what that looks like :) more sciency parts pls! also i love pip
Best of luck in your undergraduate journey! Planetary exploration is causing all the rave in astronomy these days with so many new instruments going on sky, so you've joined just in time!! Also everyone in the office loves Pip as well 😆
I’m an astronomy grad student in South Africa and my friend (who is also my officemate) has that Lego set by her desk! 😄
Also have a question: in what form does the gas you’re looking at exist? HI and maybe HII, I’m guessing? If HI, and I’m just thinking out loud here, is there anything that precludes centimetre Very Long Baseline Interferometry experiments to compare the gas proportions in the different regions of galaxies with those predicted by your simulations? If it’s possible for HI, then possibly HII as well but I’m not sure where its strongest spectral lines lie in terms of frequency.
@@senkhosisimelane7534 wow our lives are slightly parallel from across the world! 😆 to answer your question my simulation includes both neutral and ionized hydrogen! The balance between the two depends on the temperature , density, and radiation fields of the galaxy. The gas you see in the video are most likely ionized as they’ve experienced shock from being hit with radiative feedback. I believe there are some studies in cm VLBI to compare gas proportions, but I haven’t taken the time to look at it in great detail 🙈 emission lines of ionized hydrogen are too faint in cm wavelengths so I don’t think it’s observable with VLBI. However, its strongest emission lines are in the optical and UV! As for neutral hydrogen with VLBI I think it may be feasible but I’m not too sure at what wavelength. I know that HI can be INCREDIBLY faint across many wavelengths so it may take a very high dense region to produce emission at all.
@@ogeokoronkwo Ah, cool! Thanks for the info - my work isn’t on gas components of galaxies so you’ve taught me something today!
MeerKAT has been doing well in detecting 21cm HI lines (not sure out to what redshift but I think in the nearby universe) but I don’t know if has the spatial resolution on its own to enable comparison of gas proportions. My guess would be no. But with SKA-1-Mid coming up and plans to do include it in VLBI observations, that will probably transform the sensitivity of high-resolution imaging experiments in the cm wavelengths. Of course, this is too far into the future to be of immediate interest to you now, but what are scientists if not dreamers? 😄
Recently discovered your channel and I’m enjoying seeing how other students work and how the culture is in different groups and departments. Thanks for sharing your journey!
MeerKAT is mainly limited to the nearby universe. However tools like JWST and ALMA are great for galaxies out to redshift 6! My second project actually focuses on using statistical methods to calculate molecular gas mass fractions at higher redshifts, and all of my data thus far is from ALMA! Hoping to make a full video about this project around December if for those interested. Thanks for the great questions and for following along with my content!!! Keep up the great work in SA :)))
Oh my God! My heart felt a warmth when I saw Palestine's flag 🇵🇸 🫒🕊
@@Fae7eh ah yes! It’s my office mates flag but we all attend demonstrations together! Long live the intifada 🍉
Happy to have you and your friends as my planet-mates ❤
Love your office space! Ok had to edit because I had to nerd out. How are you integrating HDM (Hot Dark Matter) and CDM (Cold Dark Matter) into your models? Not going to get into the weeds but as an aspiring computational astrophysicist and older college student I find it interesting.
Great question, but sadly my answer is quite boring 🙈 In the models that I use, we don't integrate hot and cold dm. Our subgrid model follows the Lambda CDM model. So it's simple, but effective. I don't know if anyone in my collaboration group is working on incorporating HDM now or in the future. Although I think it would be interesting to analyze the two and compare!
@@ogeokoronkwo That could be my thesis when I eventually end up as a PhD student: A Comparative Analysis of Hot and Cold Dark Matter Integrations in ΛCDM Cosmological Models
@@AndreTJones that sounds like a great thesis!!! I honestly think you’d have some of the coolest line ups of projects!
@@ogeokoronkwo I want you to know that you really inspired me and I have a “working” thesis. I really hope I don’t come off as weird, lol. I have not taken any physics classes yet since I’m focusing on finishing my CS degree. With the help of ChatGPT and my own research I came up with this:
1. Introduction
• Introduce the need for a comprehensive dark matter model integrating both HDM and CDM, while highlighting how PBHs could serve as a novel dark matter candidate.
2. Literature Review
• Review existing ΛCDM models, focusing on their treatment of CDM and the neglect of HDM.
• Include a section on PBHs, summarizing their theoretical basis and potential as dark matter candidates.
3. Theoretical Framework
• Develop the mathematical models for HDM and CDM integration.
• Provide equations governing PBH formation and long-term stability due to quantum effects.
4. Methodology
• Detail your computational approach, including N-body and hydrodynamical simulations.
• Discuss the specific software and tools you’ll use, like GADGET-2, and any custom code development.
5. Simulations and Results
• Present the results of your simulations, focusing on galaxy formation and structure evolution.
• Include visualizations (e.g., graphs, 3D models) to illustrate the impact of HDM and PBH on large-scale structures.
6. Discussion
• Compare your findings with existing observational data, focusing on the CMB and large-scale structure.
• Discuss the implications of quantum-scale PBHs for dark matter models.
7. Conclusion
• Summarize the key insights from your comparative analysis of HDM and CDM in ΛCDM models.
• Highlight the potential of PBHs as an alternative dark matter candidate.