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Carl Rodriguez

@carlrodriguez.bsky.social

Professor of astrophysics at UNC, studying colliding black holes, swarming stars, and other things that go bump in the night. Big fan of transit, biking, climbing, Durham NC, he/him dynamics.unc.edu

3,092 Followers  |  648 Following  |  496 Posts  |  Joined: 15.06.2023  |  2.0554

Latest posts by carlrodriguez.bsky.social on Bluesky

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Project A119 - Wikipedia

Honestly the whole nuclear Moon idea was a lot cooler in the 50s

04.08.2025 23:15 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Gonna text this to some HEP friends with the words β€œMoon DUNE?” and no other context

04.08.2025 21:34 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

…what?

04.08.2025 21:18 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 2    πŸ“Œ 0

"Do you have a syllabus yet?"

01.08.2025 15:34 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Right up there with "how's class prep going?"

01.08.2025 12:24 β€” πŸ‘ 9    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

It's possible to be extremely good in your field, well-liked, and respected, and still strike out (I know many people who have, who I thought would have made great professors). But if you look at all that chaos and luck and politics and conclude "no it's a black guy's fault", you're just a racist.

31.07.2025 18:22 β€” πŸ‘ 51    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

Reading the article, I think it's even more embarrassing: it sounds like Cornell had an open search, which he applied to and was rejected from. The target-of-opportunity search (as they're often called) was actually SEPARATE from the search that rejected him.

31.07.2025 18:13 β€” πŸ‘ 40    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

Oooof

30.07.2025 21:26 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Ok it can stop being Too Damn Hot now.

30.07.2025 14:37 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I’m not sure what’s more likely: that there really is a conspiracy and they’re failing spectacularly to contain it, or there isn’t one, but they’re flailing so badly it looks like a coverup.

Either option requires an almost stupendous level of incompetence!

30.07.2025 14:35 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I knew a pop synth guy who claimed exactly this without irony.

24.07.2025 15:27 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Ah ok; so at that point you're inclined to stick with Nature Astronomy since it's already gone through review with them, as opposed to withdrawing and resubmitting to something like ApJL.

24.07.2025 15:00 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

I've never submitted to them either (wasn't planning on it at the moment). I guess I was curious how many of the Nature Astronomy papers are referred from the main journal vs people submitting directly. Or to put it another way, how many people actually elect for Nature Astronomy over, say, ApJL?

24.07.2025 14:58 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Ok yeah that’s kind of what I assumed. Do you know if they do that before or after peer review?

24.07.2025 14:16 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

So what's the deal with Nature Astronomy? Do people typically submit to Nature, it passes peer review, and then they're like "actually we don't feel it's appropriate for Nature but how about Nature Astronomy"?

24.07.2025 12:36 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Current mood

23.07.2025 14:14 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Post image

CAREER proposal asking the important questions

22.07.2025 20:36 β€” πŸ‘ 13    πŸ” 0    πŸ’¬ 1    πŸ“Œ 1

It's so good!

14.07.2025 14:42 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Accurate description of my home state, but at least our corruption is entertaining as hell. Only yankee politician I've ever seen even approach that level is Eric Adams.

14.07.2025 14:17 β€” πŸ‘ 7    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0

Wonder how long until some millennialist types decide God is speaking to them through ChatGPT.

14.07.2025 03:05 β€” πŸ‘ 9    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0
Preview
GW231123: a Binary Black Hole Merger with Total Mass 190-265 $M_{\odot}$ On 2023 November 23 the two LIGO observatories both detected GW231123, a gravitational-wave signal consistent with the merger of two black holes with masses $137^{+22}_{-17}\, M_\odot$ and $103^{+20}_{-52}\, M_\odot$ (90\% credible intervals), at luminosity distance 0.7-4.1 Gpc and redshift of $0.39^{+0.27}_{-0.24}$, and a network signal-to-noise ratio of $\sim$22.5. Both black holes exhibit high spins, $0.9^{+0.10}_{-0.19}$ and $0.80^{+0.20}_{-0.51}$ respectively. A massive black hole remnant is supported by an independent ringdown analysis. Some properties of GW231123 are subject to large systematic uncertainties, as indicated by differences in inferred parameters between signal models. The primary black hole lies within or above the theorized mass gap where black holes between 60-130 $M_\odot$ should be rare due to pair instability mechanisms, while the secondary spans the gap. The observation of GW231123 therefore suggests the formation of black holes from channels beyond standard stellar collapse, and that intermediate-mass black holes of mass $\sim$200 $M_\odot$ form through gravitational-wave driven mergers.

Big black holes

arxiv.org/abs/2507.08219

14.07.2025 02:47 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 1

I’m not sure tbh, but compared to the success rate of say AAG (15-20%) or ATP (10-15%) 5% is really low. Like getting to the point where I’m not sure it’s worth having students apply for it

11.07.2025 22:16 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Not updated in NSPIRE yet annoyingly; one of my students sent it to me

11.07.2025 21:31 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

nspires.nasaprs.com/external/vie...

11.07.2025 21:30 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

Jesus a 5% acceptance rate for FINESST this year is brutal.

11.07.2025 21:11 β€” πŸ‘ 10    πŸ” 0    πŸ’¬ 2    πŸ“Œ 1

Not gonna lie I didn't know those were a real brand

11.07.2025 15:05 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Picture of Ralph Wiggum at a computer with text that says "I'm a particle physicist"

Picture of Ralph Wiggum at a computer with text that says "I'm a particle physicist"

Me writing about stellar streams and dark matter:

11.07.2025 15:02 β€” πŸ‘ 7    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

That would require actually going into work

11.07.2025 01:57 β€” πŸ‘ 8    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Lol just realized I misspelled "Omega Centauri" in this.

11.07.2025 01:05 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

New paper, led by Northwestern grad student Elena GonzΓ‘lez, looking at the promising intermediate-mass black hole candidate identified in Omega Centaury (the largest globular cluster in the Milky Way, and most likely the remnant core of a disrupted dwarf galaxy). πŸ”­πŸ§ͺ

10.07.2025 17:44 β€” πŸ‘ 21    πŸ” 2    πŸ’¬ 2    πŸ“Œ 0

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