Dr Jan Eldridge
@astro-jje.bsky.social
NZ theoretical astrophysicist studying exploding binary stars. Sci-fi addict, feminist, non-binary femme. Pronouns: she/her/they. All views my own.
Reposted by Dr Jan Eldridge
NZ electricity reached 99.9% renewable on 25 October, I believe that is a record. And that's despite a tenth of geothermal capacity appearing to be out of action (maintenance?) since the start of October. Source: em6
October 31, 2025 at 3:46 AM
NZ electricity reached 99.9% renewable on 25 October, I believe that is a record. And that's despite a tenth of geothermal capacity appearing to be out of action (maintenance?) since the start of October. Source: em6
Reposted by Dr Jan Eldridge
Cecilia Payne-Gaposchkin ✨ figured out what stars are made of ✨ when she was just 25. 🔭🧪
Her PhD thesis basically established the Harvard astro department — at a time when Harvard didn't officially allow woman students.
I wrote this little profile to mark the 100th anniversary of her thesis:
Her PhD thesis basically established the Harvard astro department — at a time when Harvard didn't officially allow woman students.
I wrote this little profile to mark the 100th anniversary of her thesis:
September 24, 2025 at 9:14 AM
Cecilia Payne-Gaposchkin ✨ figured out what stars are made of ✨ when she was just 25. 🔭🧪
Her PhD thesis basically established the Harvard astro department — at a time when Harvard didn't officially allow woman students.
I wrote this little profile to mark the 100th anniversary of her thesis:
Her PhD thesis basically established the Harvard astro department — at a time when Harvard didn't officially allow woman students.
I wrote this little profile to mark the 100th anniversary of her thesis:
Reposted by Dr Jan Eldridge
Trade unions vow to oppose Supreme Court trans ruling
'It's trans people they are kicking around; one delegate told the TUC conference
One representative of Unison accused Bridget Phillipson, the equalities minister, of overseeing a “segregation” of trans people in society.
👉🏻 archive.ph/NKVHi
'It's trans people they are kicking around; one delegate told the TUC conference
One representative of Unison accused Bridget Phillipson, the equalities minister, of overseeing a “segregation” of trans people in society.
👉🏻 archive.ph/NKVHi
September 9, 2025 at 10:55 PM
Trade unions vow to oppose Supreme Court trans ruling
'It's trans people they are kicking around; one delegate told the TUC conference
One representative of Unison accused Bridget Phillipson, the equalities minister, of overseeing a “segregation” of trans people in society.
👉🏻 archive.ph/NKVHi
'It's trans people they are kicking around; one delegate told the TUC conference
One representative of Unison accused Bridget Phillipson, the equalities minister, of overseeing a “segregation” of trans people in society.
👉🏻 archive.ph/NKVHi
Reposted by Dr Jan Eldridge
Thanks to @slavkobogdanov.bsky.social for pointing me to this really cool 🔭 history paper! arxiv.org/abs/2509.04127
New Arabic records from Cairo on supernovae 1181 and 1006
The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000-5000 yr), the unusual star IRAS 00500+6713 with a surroundin...
arxiv.org
September 6, 2025 at 12:35 AM
Thanks to @slavkobogdanov.bsky.social for pointing me to this really cool 🔭 history paper! arxiv.org/abs/2509.04127
One of the awesome bits of supernova science I always love is when someone finds a new ancient record of a supernovae! In this case new Arabic records for SN1181 and SN1006 from poems!
arxiv.org/abs/2509.04127
arxiv.org/abs/2509.04127
New Arabic records from Cairo on supernovae 1181 and 1006
The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000-5000 yr), the unusual star IRAS 00500+6713 with a surroundin...
arxiv.org
September 5, 2025 at 9:48 PM
One of the awesome bits of supernova science I always love is when someone finds a new ancient record of a supernovae! In this case new Arabic records for SN1181 and SN1006 from poems!
arxiv.org/abs/2509.04127
arxiv.org/abs/2509.04127
Reposted by Dr Jan Eldridge
This is Delta. He just had his first bath. And you just had your last day of peace. 12/10 (IG: camphusky)
September 3, 2025 at 6:59 PM
This is Delta. He just had his first bath. And you just had your last day of peace. 12/10 (IG: camphusky)
Reposted by Dr Jan Eldridge
People Watching: Ice skating at Ice Sports Southland, Gore, on a wintry Saturday afternoon
August 19, 2025 at 8:13 PM
People Watching: Ice skating at Ice Sports Southland, Gore, on a wintry Saturday afternoon
Reposted by Dr Jan Eldridge
From Chloe Klare: Interested in the definitive, absolutely objective ranking of the best differential equations in astronomy and astrophysics?? Read on!! 🔭✨☄️ astrobites.org/2025/08/18/t...
The Top Ten Differential Equations in Astronomy, Ranked!
Interested in the definitive, absolutely objective ranking of the best differential equations in astronomy and astrophysics?? Read on!!
astrobites.org
August 19, 2025 at 11:28 PM
From Chloe Klare: Interested in the definitive, absolutely objective ranking of the best differential equations in astronomy and astrophysics?? Read on!! 🔭✨☄️ astrobites.org/2025/08/18/t...
Nearly 18 months ago I attended a workshop: "The Chronology of the Very Early Universe According to JWST: The First Billion Years" remotely. It was a really well organized meeting and despite being in a different time zone is was possible to Zoom in and contribute to the discussions.
August 10, 2025 at 7:48 AM
Nearly 18 months ago I attended a workshop: "The Chronology of the Very Early Universe According to JWST: The First Billion Years" remotely. It was a really well organized meeting and despite being in a different time zone is was possible to Zoom in and contribute to the discussions.
Reposted by Dr Jan Eldridge
So now I can talk about arxiv.org/abs/2507.13409 - First science results with the @vrubinobs.bsky.social LSSTCam!
July 21, 2025 at 7:42 AM
So now I can talk about arxiv.org/abs/2507.13409 - First science results with the @vrubinobs.bsky.social LSSTCam!
Got back to NZ from the UK in under 29 hours (door-to-door)... that's a new record!
The only problem is the plane has landed at night and I've never had to deal with 12 hour jetlag when you have to go straight to sleep.
Normally I arrive in the morning and just stay up. Oh well this'll be fun!
The only problem is the plane has landed at night and I've never had to deal with 12 hour jetlag when you have to go straight to sleep.
Normally I arrive in the morning and just stay up. Oh well this'll be fun!
July 7, 2025 at 12:20 PM
Got back to NZ from the UK in under 29 hours (door-to-door)... that's a new record!
The only problem is the plane has landed at night and I've never had to deal with 12 hour jetlag when you have to go straight to sleep.
Normally I arrive in the morning and just stay up. Oh well this'll be fun!
The only problem is the plane has landed at night and I've never had to deal with 12 hour jetlag when you have to go straight to sleep.
Normally I arrive in the morning and just stay up. Oh well this'll be fun!
Reposted by Dr Jan Eldridge
In response to the ever-increasing number of submissions to the Open Journal of Astrophysics, I'd like to invite more astrophysicistsonto our Editorial Board. We're looking for volunteers with expertise in any area of astrophysics!
Please contact me or @ojastro.bsky.social
astro.theoj.org
Please contact me or @ojastro.bsky.social
astro.theoj.org
The Open Journal of Astrophysics
The Open Journal of Astrophysics is an arXiv overlay journal providing open access to peer-reviewed research in astrophysics and cosmology.
astro.theoj.org
June 21, 2025 at 11:05 AM
In response to the ever-increasing number of submissions to the Open Journal of Astrophysics, I'd like to invite more astrophysicistsonto our Editorial Board. We're looking for volunteers with expertise in any area of astrophysics!
Please contact me or @ojastro.bsky.social
astro.theoj.org
Please contact me or @ojastro.bsky.social
astro.theoj.org
This time last year I was interviewed by the American Institute of Physics to be included in their oral histories. It's recently been posted, the delay being due to me having pericarditis preventing me from getting around to read through the transcript (it was about 30,000 words...)...
June 21, 2025 at 9:11 AM
This time last year I was interviewed by the American Institute of Physics to be included in their oral histories. It's recently been posted, the delay being due to me having pericarditis preventing me from getting around to read through the transcript (it was about 30,000 words...)...
Yesterday I gave my "Pride in Physics" lecture at the University of Oxford's Department of Physics. This was my personal story of my academic career and how my journey in understanding myself and transitioning is intertwined with it.
June 19, 2025 at 3:11 PM
Yesterday I gave my "Pride in Physics" lecture at the University of Oxford's Department of Physics. This was my personal story of my academic career and how my journey in understanding myself and transitioning is intertwined with it.
Reposted by Dr Jan Eldridge
. @astro-jje.bsky.social is a great speaker! youtu.be/t65sdhHIR4c?...
We are all made of Stardust but Gold, Silver and Platinum are Neutron Stardust
YouTube video by RASCCalgary
youtu.be
June 18, 2025 at 10:37 PM
. @astro-jje.bsky.social is a great speaker! youtu.be/t65sdhHIR4c?...
Reposted by Dr Jan Eldridge
Today we had our annual Pride Lecture in Oxford Physics (@oxfordphysics.bsky.social). The lecture was given by Prof Jan Eldridge (@astro-jje.bsky.social) and it was phenomenal! It was wonderful to learn how she has exploded binaries in both astrophysics and gender 🔭 🏳️⚧️
June 18, 2025 at 10:01 PM
Today we had our annual Pride Lecture in Oxford Physics (@oxfordphysics.bsky.social). The lecture was given by Prof Jan Eldridge (@astro-jje.bsky.social) and it was phenomenal! It was wonderful to learn how she has exploded binaries in both astrophysics and gender 🔭 🏳️⚧️
Reposted by Dr Jan Eldridge
🆕The EHRC has rolled back its previous insistence that UK single-sex service providers "must" provide single-sex options.
It's significant for employers and hospitality - but doesn't change its guidance's implication: Segregation for Trans+ people
Here's what they've said 🧵
It's significant for employers and hospitality - but doesn't change its guidance's implication: Segregation for Trans+ people
Here's what they've said 🧵
June 17, 2025 at 4:15 PM
🆕The EHRC has rolled back its previous insistence that UK single-sex service providers "must" provide single-sex options.
It's significant for employers and hospitality - but doesn't change its guidance's implication: Segregation for Trans+ people
Here's what they've said 🧵
It's significant for employers and hospitality - but doesn't change its guidance's implication: Segregation for Trans+ people
Here's what they've said 🧵
Reposted by Dr Jan Eldridge
🚨 Paper day!!! 🚨
Excited to announce that this project I’ve been working on these last few years has been published!
Read more at : arxiv.org/abs/2506.13004
More info in the 🧵
Excited to announce that this project I’ve been working on these last few years has been published!
Read more at : arxiv.org/abs/2506.13004
More info in the 🧵
New Field OB and OBe Binaries of the SMC Wing: Observational Properties and Population Modeling
We present a radial velocity (RV) survey of the field OB and OBe stars of the SMC Wing. We use multi-epoch observations of 55 targets obtained with the Magellan IMACS and M2FS multi-object spectrograp...
arxiv.org
June 17, 2025 at 5:53 PM
🚨 Paper day!!! 🚨
Excited to announce that this project I’ve been working on these last few years has been published!
Read more at : arxiv.org/abs/2506.13004
More info in the 🧵
Excited to announce that this project I’ve been working on these last few years has been published!
Read more at : arxiv.org/abs/2506.13004
More info in the 🧵
Reposted by Dr Jan Eldridge
We use BPASS to predict frequencies of ejected OB and OBe stars and binaries. We also predict companion frequencies and model distributions of primary & secondary masses & some orbital parameters. (Shoutout to @astro-jje.bsky.social !!)
June 17, 2025 at 5:55 PM
We use BPASS to predict frequencies of ejected OB and OBe stars and binaries. We also predict companion frequencies and model distributions of primary & secondary masses & some orbital parameters. (Shoutout to @astro-jje.bsky.social !!)
Reposted by Dr Jan Eldridge
From Kaz Gary: For Pride Month, Astrobites is interviewing one transgender astronomer every week. This week we interviewed Joy Bhattacharya, a PhD candidate at the Ohio State University! 🔭✨☄️
astrobites.org/2025/06/13/j...
astrobites.org/2025/06/13/j...
Transgender in Astronomy: Interview with Joy Bhattacharya
For Pride Month, Astrobites is interviewing one transgender astronomer every week. This week we interviewed Joy Bhattacharya, a PhD candidate at the Ohio State University!
astrobites.org
June 15, 2025 at 2:40 AM
From Kaz Gary: For Pride Month, Astrobites is interviewing one transgender astronomer every week. This week we interviewed Joy Bhattacharya, a PhD candidate at the Ohio State University! 🔭✨☄️
astrobites.org/2025/06/13/j...
astrobites.org/2025/06/13/j...
Reposted by Dr Jan Eldridge
On Wednesday 18th June, I'll be hosting @astro-jje.bsky.social in @oxfordphysics.bsky.social, where she will be giving the annual Pride Lecture. If you'd like to attend, please sign up through the following link or scan the QR code in the attached flyer: www.physics.ox.ac.uk/events/pride...
June 13, 2025 at 1:15 PM
On Wednesday 18th June, I'll be hosting @astro-jje.bsky.social in @oxfordphysics.bsky.social, where she will be giving the annual Pride Lecture. If you'd like to attend, please sign up through the following link or scan the QR code in the attached flyer: www.physics.ox.ac.uk/events/pride...
I'd forgotten just how good The Hobbit movie trilogy is.
May 25, 2025 at 2:27 AM
I'd forgotten just how good The Hobbit movie trilogy is.
A controversial opinion: the live action Thunderbirds movie was actually a good film.
May 24, 2025 at 7:47 AM
A controversial opinion: the live action Thunderbirds movie was actually a good film.
These are always the interviews I like doing. Answering a random question and trying to explain our current understanding in a simple way. Especially when the interviewer can suddenly change tack in the middle!
www.rnz.co.nz/national/pro...
www.rnz.co.nz/national/pro...
Shower Thoughts: Does space end?
Does space go on forever? And if it does end, what's on the other side? Professor Jan Eldrige is the Interim Deputy Dean at University of Auckland's Science Faculty and they join Emile Donovan on the ...
www.rnz.co.nz
May 20, 2025 at 8:08 PM
These are always the interviews I like doing. Answering a random question and trying to explain our current understanding in a simple way. Especially when the interviewer can suddenly change tack in the middle!
www.rnz.co.nz/national/pro...
www.rnz.co.nz/national/pro...
This is really rather good!
New blog post! Today in my #CosmicStories #ScienceandSF blog, I'm returning to #Astronomy and looking at red dwarf stars and their planets in science and science fiction. Including works by Blish, Chambers, Asimov, Latham, Steele and others.
www.warwick.ac.uk/cosmicstorie...
Comments welcome!
www.warwick.ac.uk/cosmicstorie...
Comments welcome!
May 18, 2025 at 9:25 AM
This is really rather good!