derkal.bsky.social
Astrophysicist working on dark matter, near-field cosmology, and galaxy formation. All opinions are my own. He/him.
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I didn’t mean to trash talk LSST, just that even with this initial processing and without stretching it’s already close to what you had so it’s already pretty good. I look forward to how deep it can be pushed!
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Do you know if the processing was optimized for LSB features or was it the standard pipeline? By eye the depth doesn’t seem that different from your Mihos+2017 paper
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Very nice @chrismihos.bsky.social! Do you have a sense of the surface brightness limits of Rubin given your previous work?
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When I’ve asked chatgpt technical questions, it frequently makes subtle mistakes that only an expert would know are wrong. If an expert is needed to fix its output, I’d argue it can’t do anything of importance on its own.
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Yes! If you’re ever in London please let me know!
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Congrats on the book Adam! I’ve enjoyed all your interviews I’ve read about it. I also bought it and look forward to reading it!
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That would be interesting. Would it be in the evening?
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That’s a great target! Was this with a mosaic or just the normal field of view?
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Very nice. I guess it would take quite a bit to tile the disk. It would be cool to see but a lot of work!
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Very nice! Have you ever done the LMC/SMC with the seestar?
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He also made some very cool 3d visualizations where you can compare the stream in CDM/SIDM and rotate the stream around connorhainje.com/sgr-sidm-viz.... Even cooler is an interactive 3d animation which is rotatable connorhainje.com/sgr-sidm-viz... 6/
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These results cannot immediately be turned into a constraint on SIDM since changes to the orbit of Sagittarius and the Milky Way/LMC potential also change the mass loss. Fits to the stream which vary the Milky Way and LMC potentials and SIDM cross-section will be needed to constrain SIDM 5/
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Connor made a nice movie showing how the stream would evolve in CDM and SIDM - www.youtube.com/watch?v=_BAd.... This shows how different the stream can look despite being on a similar orbit. 4/
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The stars in the stream would also look different. Due to the rapid mass loss in SIDM, stars leave with a smaller dispersion at the previous pericenter, and thus create a much smaller spur in the stream. In CDM, the more gradual mass loss results in a significant spur, closer to what is observed 3/
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At the SIDM cross-sections considered in this work, the dark matter halo is almost completely stripped and there would be no dark matter remaining with the stars in Sagittarius. This figure shows the dark matter in CDM on the left and in SIDM on the right. 2/
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Very cool paper!
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Congratulations! I love the series!
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Looks great and I loved the book. Do you plan to release any more signed versions?
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Sorry for your loss and condolences to your family
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I finished Terminal World recently. I really like the worlds he builds!
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100
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How long does an idea for a story percolate in your head before you turn it into a novel?
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Congrats!
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Definitely. I thought there was going to be a block where projects that made it through the first round couldn’t be resubmitted the next year. I guess this was waived?
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Great to have you here Jim!