David Tsang
@drda5id.bsky.social
Theoretical Astrophysicist at the University of Bath, UK. Spends time thinking about Mathematical Physics, Neutron Stars, Black Holes, Planets and Disks, Board Games, Crafting, Leather Working, Cooking, and other stochastically determined hobbies.
Reposted by David Tsang
Donald Trump is a convicted felon.
May 30, 2024 at 9:06 PM
Donald Trump is a convicted felon.
Reposted by David Tsang
Three PhD positions are open in the University of Bath Astrophysics group, one on nuclear physics and neutron stars with Dr David Tsang (me), one on GRB afterglow simulations with Dr Hendrik Van Eerten, and one on AGN outflows with Dr Carolin Villforth. Closing date of Feb 11.
December 20, 2023 at 6:32 PM
Three PhD positions are open in the University of Bath Astrophysics group, one on nuclear physics and neutron stars with Dr David Tsang (me), one on GRB afterglow simulations with Dr Hendrik Van Eerten, and one on AGN outflows with Dr Carolin Villforth. Closing date of Feb 11.
Interested in GRBs and GRB Host Galaxies? Come to the University of Bath! We have a position open for a postdoctoral research associate working with Dr Patricia Schady on host galaxy properties and local environments of GRBs. Deadline Jan 18. jobregister.aas.org/ad/0748f8cc
January 4, 2024 at 10:38 PM
Interested in GRBs and GRB Host Galaxies? Come to the University of Bath! We have a position open for a postdoctoral research associate working with Dr Patricia Schady on host galaxy properties and local environments of GRBs. Deadline Jan 18. jobregister.aas.org/ad/0748f8cc
Three PhD positions are open in the University of Bath Astrophysics group, one on nuclear physics and neutron stars with Dr David Tsang (me), one on GRB afterglow simulations with Dr Hendrik Van Eerten, and one on AGN outflows with Dr Carolin Villforth. Closing date of Feb 11.
December 20, 2023 at 6:32 PM
Three PhD positions are open in the University of Bath Astrophysics group, one on nuclear physics and neutron stars with Dr David Tsang (me), one on GRB afterglow simulations with Dr Hendrik Van Eerten, and one on AGN outflows with Dr Carolin Villforth. Closing date of Feb 11.
Come join us in the Theoretical Physics group at the University of Bath! A Lectureship position is now open with a closing date of Feb 13. Open to any theoretical physicists (including Astro theorists, photonics, nano, and biophysics). bath.ac.uk/jobs/Vacancy...
December 20, 2023 at 6:29 PM
Come join us in the Theoretical Physics group at the University of Bath! A Lectureship position is now open with a closing date of Feb 13. Open to any theoretical physicists (including Astro theorists, photonics, nano, and biophysics). bath.ac.uk/jobs/Vacancy...
Reposted by David Tsang
Subrahmanyan Chandrasekhar was born OTD in 1910. He established an upper limit on the mass of stable white dwarf stars. Above this Chandrasekhar Limit – about 1.44 solar masses – stars eventually explode and then collapse into a neutron star or black hole. 🧪 🔭
Photo: Stephen Lewellyn / AIP
Photo: Stephen Lewellyn / AIP
October 19, 2023 at 2:23 PM
Subrahmanyan Chandrasekhar was born OTD in 1910. He established an upper limit on the mass of stable white dwarf stars. Above this Chandrasekhar Limit – about 1.44 solar masses – stars eventually explode and then collapse into a neutron star or black hole. 🧪 🔭
Photo: Stephen Lewellyn / AIP
Photo: Stephen Lewellyn / AIP
Reposted by David Tsang
HOLY CRAP
Jupiter's moon Io as it appeared to the Juno spacecraft on yesterday's Perijove 55.
NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill
NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill
October 17, 2023 at 12:02 AM
HOLY CRAP
Reposted by David Tsang
Amidst all the sadness surrounding the past week I am happy to share that a paper I contributed to, led by researchers at the Weizmann Institute of Science in Israel, has been accepted for publication in Nature arxiv.org/abs/2310.07784
A 12.4 day periodicity in a close binary system after a supernova
Neutron stars and stellar-mass black holes are the remnants of massive star explosions. Most massive stars reside in close binary systems, and the interplay between the companion star and the...
arxiv.org
October 17, 2023 at 12:38 AM
Amidst all the sadness surrounding the past week I am happy to share that a paper I contributed to, led by researchers at the Weizmann Institute of Science in Israel, has been accepted for publication in Nature arxiv.org/abs/2310.07784
Reposted by David Tsang
The Franco-Chinese SVOM satellite successfully passed vibration, shock and acoustic tests. Another important step toward the launch scheduled for early next year. Looking forward to the first GRB observations ! 🔭
www.svom.eu/en/integrati...
www.svom.eu/en/integrati...
October 13, 2023 at 1:03 PM
The Franco-Chinese SVOM satellite successfully passed vibration, shock and acoustic tests. Another important step toward the launch scheduled for early next year. Looking forward to the first GRB observations ! 🔭
www.svom.eu/en/integrati...
www.svom.eu/en/integrati...
The University of Bath is offering 5 university graduate student fellowships based on academic excellence for international students to do their PhDs. Contact me if you are interested in working with me on the theoretical astrophysics of neutron stars and would like to be nominated.
September 18, 2023 at 1:44 PM
The University of Bath is offering 5 university graduate student fellowships based on academic excellence for international students to do their PhDs. Contact me if you are interested in working with me on the theoretical astrophysics of neutron stars and would like to be nominated.
Reposted by David Tsang
𝗥𝗲𝗮𝘀𝗼𝗻𝘀 𝘁𝗼 𝗯𝗲 𝘀𝗰𝗲𝗽𝘁𝗶𝗰𝗮𝗹 𝗮𝗯𝗼𝘂𝘁 𝘁𝗵𝗲 '𝗼𝗰𝗲𝗮𝗻 𝗽𝗹𝗮𝗻𝗲𝘁 𝘄𝗶𝘁𝗵 𝗽𝗼𝘀𝘀𝗶𝗯𝗹𝗲 𝘀𝗶𝗴𝗻𝘀 𝗼𝗳 𝗹𝗶𝗳𝗲'.
Ok, probably everyone has seen the headlines about K2-18b by now.
I've put together this thread to collate some thoughts on why many exoplanet astronomers are pretty sceptical about these claims - THREAD (1/N)
Ok, probably everyone has seen the headlines about K2-18b by now.
I've put together this thread to collate some thoughts on why many exoplanet astronomers are pretty sceptical about these claims - THREAD (1/N)
September 13, 2023 at 2:20 AM
𝗥𝗲𝗮𝘀𝗼𝗻𝘀 𝘁𝗼 𝗯𝗲 𝘀𝗰𝗲𝗽𝘁𝗶𝗰𝗮𝗹 𝗮𝗯𝗼𝘂𝘁 𝘁𝗵𝗲 '𝗼𝗰𝗲𝗮𝗻 𝗽𝗹𝗮𝗻𝗲𝘁 𝘄𝗶𝘁𝗵 𝗽𝗼𝘀𝘀𝗶𝗯𝗹𝗲 𝘀𝗶𝗴𝗻𝘀 𝗼𝗳 𝗹𝗶𝗳𝗲'.
Ok, probably everyone has seen the headlines about K2-18b by now.
I've put together this thread to collate some thoughts on why many exoplanet astronomers are pretty sceptical about these claims - THREAD (1/N)
Ok, probably everyone has seen the headlines about K2-18b by now.
I've put together this thread to collate some thoughts on why many exoplanet astronomers are pretty sceptical about these claims - THREAD (1/N)
Come join us in the Astrophysics Group at the University of Bath Department of Physics! Job opening for a Lecturer (Assistant Professor) in Astrophysics, with applications due Nov 1, 2023.
www.bath.ac.uk/jobs/Vacancy...
www.bath.ac.uk/jobs/Vacancy...
September 8, 2023 at 4:30 PM
Come join us in the Astrophysics Group at the University of Bath Department of Physics! Job opening for a Lecturer (Assistant Professor) in Astrophysics, with applications due Nov 1, 2023.
www.bath.ac.uk/jobs/Vacancy...
www.bath.ac.uk/jobs/Vacancy...
Reposted by David Tsang
Re-upping for the 🔭 feed!
The 2024 Announcement of Opportunity for the NASA Hubble Fellowship Program (#NHFP) is now open! Interested scientists within 4 years of their PhDs should apply by Nov. 2; recommendation letters are due Nov. 9. Ask me if you have any questions!
nexsci.caltech.edu/sagan/fellow...
nexsci.caltech.edu/sagan/fellow...
September 6, 2023 at 4:25 PM
Re-upping for the 🔭 feed!
Reposted by David Tsang
Since so many have asked, here’s my hot take on the spherules Loeb found and the manuscript he’s loudly rushed to the world. These are pretty typical cosmic spherules. Had he done the *obvious*--a control sample 100 km away from the meteor--he’d have found the same thing. 1/20
September 1, 2023 at 9:14 AM
Since so many have asked, here’s my hot take on the spherules Loeb found and the manuscript he’s loudly rushed to the world. These are pretty typical cosmic spherules. Had he done the *obvious*--a control sample 100 km away from the meteor--he’d have found the same thing. 1/20
Reposted by David Tsang
It's that time of year again - updating my "how to apply for astro postdoc jobs" talk. Webpage and (draft) slides for the 2023 edition below - suggestions always appreciated.
rdalexander.github.io/jobs_2023.html
rdalexander.github.io/jobs_2023.html
August 31, 2023 at 9:54 AM
It's that time of year again - updating my "how to apply for astro postdoc jobs" talk. Webpage and (draft) slides for the 2023 edition below - suggestions always appreciated.
rdalexander.github.io/jobs_2023.html
rdalexander.github.io/jobs_2023.html
Reposted by David Tsang
I'm glad Avi has submitted a paper for peer review.
However, given that none of the authors seem to have any background in meteoritics, spherules, or cosmic dust, it seems inappropriate to hold a press release prior to peer review.
What's the rush?
However, given that none of the authors seem to have any background in meteoritics, spherules, or cosmic dust, it seems inappropriate to hold a press release prior to peer review.
What's the rush?
August 30, 2023 at 3:29 PM
I'm glad Avi has submitted a paper for peer review.
However, given that none of the authors seem to have any background in meteoritics, spherules, or cosmic dust, it seems inappropriate to hold a press release prior to peer review.
What's the rush?
However, given that none of the authors seem to have any background in meteoritics, spherules, or cosmic dust, it seems inappropriate to hold a press release prior to peer review.
What's the rush?
At least the orange of the jumpsuit will match his stupid face.
August 30, 2023 at 2:24 PM
At least the orange of the jumpsuit will match his stupid face.
Reposted by David Tsang
I'm on the academic job market this fall! 🥳
I recently completed my PhD, and I'm looking for a 3+ year postdoc position. I'm also applying to fellowships to potentially work on my own project ideas. 🔭
Buckle up! It's time for a thread of self-promo 😇
I recently completed my PhD, and I'm looking for a 3+ year postdoc position. I'm also applying to fellowships to potentially work on my own project ideas. 🔭
Buckle up! It's time for a thread of self-promo 😇
August 30, 2023 at 12:23 PM
I'm on the academic job market this fall! 🥳
I recently completed my PhD, and I'm looking for a 3+ year postdoc position. I'm also applying to fellowships to potentially work on my own project ideas. 🔭
Buckle up! It's time for a thread of self-promo 😇
I recently completed my PhD, and I'm looking for a 3+ year postdoc position. I'm also applying to fellowships to potentially work on my own project ideas. 🔭
Buckle up! It's time for a thread of self-promo 😇
Reposted by David Tsang
The whole piece is spectacular, but this bit in particular is just a perfect illustration of the axiom that the amount of effort required to refute bullshit is orders of magnitude greater than the effort required to produce it.
![“You can’t pick up human energy in the same way, like the energy field is just almost not there, it’s like people are holograms … It’s like a city of ghosts now, you’re there, you see them, but you can’t feel them.”
And she had noticed something even more bizarre: “People [who are vaccinated] have no scent any more. You can’t smell them. I’m not saying like, they don’t smell bad or they don’t smell – like I’m not talking about deodorant. I’m saying they don’t smell like there’s a human being in the room, and they don’t feel like there’s a human being in the room.”
This, she explained to the host, was all due to the “lipid nanoparticles” in the mRNA vaccines, since they “go into the brain, they go into the heart, and they kind of gum it up”. Perhaps even the “wavelength which is love” was experiencing this “gumming up … dialing down its ability to transmit”. She concluded, “That’s how these lipid nanoparticles work.”
That is not how lipid nanoparticles work. It is not how vaccines wo](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:ka6qwlgc2fec7gkz6cfuuxgx/bafkreiea6gb46sow6ayeurs7fgkmtcluh4m5bflsfwbxc26ihc3kttnq4i@jpeg)
August 28, 2023 at 10:22 PM
The whole piece is spectacular, but this bit in particular is just a perfect illustration of the axiom that the amount of effort required to refute bullshit is orders of magnitude greater than the effort required to produce it.
Reposted by David Tsang
Long thread on the cursed detector:
August 27, 2023 at 11:43 PM
Long thread on the cursed detector:
Reposted by David Tsang
I love this type of astro paper. @stephenserjeant.bsky.social & T Bakx show simply and convincingly, that high photometric redshifts are biased upwards. Using mostly counting statistics arguments a la Eddington (1913), it's shown that this gets worse with photo-z error.
Bonus points for the title!
🔭
Bonus points for the title!
🔭
Objects in JWST's mirrors are closer than they appear
The James Webb Space Telescope (JWST) has revealed extremely distant galaxies
at unprecedentedly early cosmic epochs from its deep imaging using the
technique of photometric redshift estimation,...
arxiv.org
August 28, 2023 at 8:15 AM
I love this type of astro paper. @stephenserjeant.bsky.social & T Bakx show simply and convincingly, that high photometric redshifts are biased upwards. Using mostly counting statistics arguments a la Eddington (1913), it's shown that this gets worse with photo-z error.
Bonus points for the title!
🔭
Bonus points for the title!
🔭
Reposted by David Tsang
Self-plug - If you'd like to have press release images for your papers, keep me in mind for commissioning!
I'm happy to work with you to create a bespoke visualisation of your work.
Here are some of the artworks I've created that have been featured on Washington Post, BBC, NYT and more.
🐡🧪🔭
I'm happy to work with you to create a bespoke visualisation of your work.
Here are some of the artworks I've created that have been featured on Washington Post, BBC, NYT and more.
🐡🧪🔭
August 27, 2023 at 1:15 PM
Self-plug - If you'd like to have press release images for your papers, keep me in mind for commissioning!
I'm happy to work with you to create a bespoke visualisation of your work.
Here are some of the artworks I've created that have been featured on Washington Post, BBC, NYT and more.
🐡🧪🔭
I'm happy to work with you to create a bespoke visualisation of your work.
Here are some of the artworks I've created that have been featured on Washington Post, BBC, NYT and more.
🐡🧪🔭
Reposted by David Tsang
Yesterday was the 20th anniversary of the launch of the Spitzer Space Telescope. Its discoveries and archives continue to impact astronomy. Here are some personal highlights: Spitzer found 1000s of protostars and young stars with disks (green dots) in molecular clouds (red) such as those in Orion. 🔭
August 26, 2023 at 7:46 PM
Yesterday was the 20th anniversary of the launch of the Spitzer Space Telescope. Its discoveries and archives continue to impact astronomy. Here are some personal highlights: Spitzer found 1000s of protostars and young stars with disks (green dots) in molecular clouds (red) such as those in Orion. 🔭
Reposted by David Tsang
We’ve made it to 6k supporters and are 60% of the way to our goal! 🙏 When we reach 10k, LEGO will consider making an official JWST set! Share with your Facebook friends!
August 21, 2023 at 4:55 PM
We’ve made it to 6k supporters and are 60% of the way to our goal! 🙏 When we reach 10k, LEGO will consider making an official JWST set! Share with your Facebook friends!