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Paul Duffell

@paulduffell.bsky.social

I'm Paul and I do Hydro. Professor of Physics and Astronomy at Purdue University. Located in beautiful Lafayette, Indiana. Host of the Astrophysics Podcast. Group Website: http://physics.purdue.edu/duffell/ Podcast Website: rss.com/podcasts/astrophysics/

483 Followers  |  59 Following  |  285 Posts  |  Joined: 27.10.2024  |  2.122

Latest posts by paulduffell.bsky.social on Bluesky

I'm sure the calculation has been done before as to how close a planet needs to get before that happens. We've seen very massive exoplanets (bigger than Jupiter) at very small orbits (smaller than Mercury's) so they presumably can keep their gaseous atmosphere at least sometimes.

03.10.2025 16:19 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thank you, I very much appreciate the kind words!

I think our current understanding of the gas giants is that they have cores about ten times the Earth's mass. But it's not crazy to think that the outer gaseous material could get stripped away if they migrate too close to the sun.

03.10.2025 16:17 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

How did you know?

01.10.2025 18:14 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Logo for the astrophysics podcast, depicting a computer simulation of a supernova (calculation originally performed by Dr. Soham Mandal).

Logo for the astrophysics podcast, depicting a computer simulation of a supernova (calculation originally performed by Dr. Soham Mandal).

Photo of Dr. Merel van 't Hoff, professor of Physics and Astronomy at Purdue University.

Photo of Dr. Merel van 't Hoff, professor of Physics and Astronomy at Purdue University.

πŸ”­πŸ§ͺ
Haven't posted here much lately, but I figured @sciencesocks.bsky.social would have words for me if I didn't promote Merel's episode of the #astrophysics #podcast!

Dr. Merel van 't Hoff tells us all about the environments that new solar systems are born in! Check it out!

rss.com/podcasts/ast...

01.10.2025 14:46 β€” πŸ‘ 10    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

Hopefully this generates enough press to effectively become an advertisement for the conference.

01.10.2025 13:13 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Some authors actively disregard the requests of the referee. If you think an author is doing that, just send them a report saying the changes you requested are not optional. If they don't like that they can find another referee. It sounds like you're not being mean, but they might be dismissive.

23.09.2025 12:01 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Can't wait til half of these students stop coming to class so I can get a decent parking spot again.

27.08.2025 14:02 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Whoa, I am jealous!

27.08.2025 00:16 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

lol it's really misleading of them to call it a "retreat". I distinctly remember the realization setting in that this was just stretching out our usual painful 1-hour meeting into a full day.

19.08.2025 11:56 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thank you! It's so nice to hear positive feedback!

02.08.2025 10:39 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

To answer your question, no they're not listening.

27.07.2025 11:13 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Sounds like now is a great time to make predictions for the apparent motion of the jet across the sky!

16.07.2025 13:27 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

My message wasn't meant as anything but positive! I am all too aware of the many reasons these things can get delayed!

11.07.2025 16:04 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

We've been anticipating this paper for months now; glad to hear you've got it out the door and I look forward to reading it!

11.07.2025 12:57 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

The universe of Star Trek is set in an idyllic world where humans never invented social media.

01.07.2025 13:47 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

My baby daughter gets pockets but my wife doesn't.

20.06.2025 15:02 β€” πŸ‘ 8    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

The multiple E & E/VG reviews combined with no acceptance is pretty common. I've had that happen, then submit a very similar proposal the following year with much poorer reviews. If the rejection was delayed this long then you should feel good about that.

20.06.2025 14:40 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I have not talked to anybody who has gotten one yet, but I think any acceptances they make will probably be delayed as long as possible, since they don't know their budget yet. So "no news is good news".

20.06.2025 14:38 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

That's a good one!

11.06.2025 20:42 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

lol don't remind me. We seem to run out of disk space whenever our results start to look interesting!

11.06.2025 13:08 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Great question -- as far as I know, the short answer is no! But I'll look into it!

11.06.2025 12:41 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

We're recording this episode soon, so in case you have any astronomy/astrophysics/science questions for us please post them here! The weirder the better. Also feel free to just ask about our lives. We're soliciting questions from a variety of sources! πŸ”­πŸ§ͺ

11.06.2025 12:29 β€” πŸ‘ 12    πŸ” 0    πŸ’¬ 4    πŸ“Œ 0

Wow, these are major changes! And no doubt they will rely on you for help with a lot of major decisions relating to how these big changes play out!

03.06.2025 17:53 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I have never tried to answer this question before but I can do my best!

03.06.2025 17:09 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

Well that's definitely right up my alley! I could talk about that for hours.

03.06.2025 17:08 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Maybe you should join me this episode, seeing as how neither of us has anything better to do!

03.06.2025 17:07 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Logo for the astrophysics podcast.  https://rss.com/podcasts/astrophysics/

Logo for the astrophysics podcast. https://rss.com/podcasts/astrophysics/

For the next episode of the #podcast, I hope to do an astrophysics Q&A. I invite you to reply with any questions about astrophysics, or questions about what it's like to be a scientist. To my scientist friends: feel free to reply if you like; just know I may quote your response in the podcast. πŸ§ͺπŸ”­

02.06.2025 18:25 β€” πŸ‘ 33    πŸ” 6    πŸ’¬ 3    πŸ“Œ 1

Infant daughter: exhales air
Me: I think she just said "dad"!

02.06.2025 13:45 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Thank you! I am glad to hear you enjoyed it!

02.06.2025 12:10 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Dr. Andrea Derdzinski, postdoctoral research fellow at Vanderbilt University.

Dr. Andrea Derdzinski, postdoctoral research fellow at Vanderbilt University.

Logo for the astrophysics podcast, with an explodey thing on the lower half.  It's supposed to be a supernova remnant.

Logo for the astrophysics podcast, with an explodey thing on the lower half. It's supposed to be a supernova remnant.

Good Morning!

This month's episode of the #astrophysics #podcast is now available! I am interviewing Dr. Andrea Derdzinski and we talk all about black holes and how we search for them! Let's hope we can continue to do so in the future! πŸ”­πŸ§ͺ

rss.com/podcasts/ast...

01.06.2025 14:00 β€” πŸ‘ 20    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0

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