Ryan Shannon
@ryanmshannon.bsky.social
Pulsar and FRB astronomer | Professor at Swinburne University of Technology | MeerKAT and Murriyang Pulsar Timing / ASKAP FRB searching | he/him
Reposted by Ryan Shannon
@astromattmiles.bsky.social (Swinburne, now Vanderbilt) for his thesis “Millisecond pulsar timing and gravitational wave searches with the MeerKAT radio telescope” supervised by @ryanmshannon.bsky.social has been awarded the Charlene Heisler Prize for the most outstanding PhD thesis in astronomy.
July 6, 2025 at 11:34 PM
@astromattmiles.bsky.social (Swinburne, now Vanderbilt) for his thesis “Millisecond pulsar timing and gravitational wave searches with the MeerKAT radio telescope” supervised by @ryanmshannon.bsky.social has been awarded the Charlene Heisler Prize for the most outstanding PhD thesis in astronomy.
With use of radio interferometers and new search strategies, these slowish transients/periodic sources are being found at increasing rate and bound to have a few/many more surprises in store.
🎉 Exciting News 🎉
I’m thrilled to share that PhD student Joshua Lee’s paper on the discovery of a radio transient with a 6.45-hour rotation period has been published in Nature Astronomy! 📡💥 - www.nature.com/articles/s41...
Read the Conversation article here - theconversation.com/blinking-rad...
I’m thrilled to share that PhD student Joshua Lee’s paper on the discovery of a radio transient with a 6.45-hour rotation period has been published in Nature Astronomy! 📡💥 - www.nature.com/articles/s41...
Read the Conversation article here - theconversation.com/blinking-rad...
The emission of interpulses by a 6.45-h-period coherent radio transient - Nature Astronomy
Coherent radio emission with a long (nearly 6.5 h) period has been detected from both magnetic poles of a rotating compact object, offering insights into the evolution and emission mechanism of compac...
www.nature.com
January 16, 2025 at 8:49 AM
With use of radio interferometers and new search strategies, these slowish transients/periodic sources are being found at increasing rate and bound to have a few/many more surprises in store.
Reposted by Ryan Shannon
The winner of cover of the year for 2024 is the September cover connected to the Caleb, Lenc et al. paper! www.nature.com/articles/s41... Congratulations to all involved, particularly Carl Knox @ozgrav.bsky.social and @csiro.bsky.social #NAstroCoverComp #astronomy
December 21, 2024 at 12:22 PM
The winner of cover of the year for 2024 is the September cover connected to the Caleb, Lenc et al. paper! www.nature.com/articles/s41... Congratulations to all involved, particularly Carl Knox @ozgrav.bsky.social and @csiro.bsky.social #NAstroCoverComp #astronomy
Nice way to commute to a conference.
December 9, 2024 at 10:39 PM
Nice way to commute to a conference.
Reposted by Ryan Shannon
Our CHIME/Pulsar data imply that a pulsar thought to be very massive... isn't. The previous mass measurement relied on white-dwarf modeling; now we have measured the orbital period decay due to gravitational-wave emission. 🔭
arxiv.org/abs/2412.02850
arxiv.org/abs/2412.02850
A Lower Mass Estimate for PSR J0348+0432 Based on CHIME/Pulsar Precision Timing
The binary pulsar J0348+0432 was previously shown to have a mass of approximately 2\,${\rm M_\odot}$, based on the combination of radial-velocity and model-dependent mass parameters derived from high-...
arxiv.org
December 8, 2024 at 11:06 PM
Our CHIME/Pulsar data imply that a pulsar thought to be very massive... isn't. The previous mass measurement relied on white-dwarf modeling; now we have measured the orbital period decay due to gravitational-wave emission. 🔭
arxiv.org/abs/2412.02850
arxiv.org/abs/2412.02850
MPTA results written up in today's The Age/Morning Herald as well
www.smh.com.au/national/a-s... @astromattmiles.bsky.social @pinkastrophysicist.bsky.social
www.smh.com.au/national/a-s... @astromattmiles.bsky.social @pinkastrophysicist.bsky.social
‘A ship on the ocean of reality’: New maps show universe is even weirder than we thought
A decade ago, astronomers observed gravitational waves for the first time. What has emerged since is a picture of the universe as a vast ocean – dark and powerful.
www.smh.com.au
December 9, 2024 at 12:11 AM
MPTA results written up in today's The Age/Morning Herald as well
www.smh.com.au/national/a-s... @astromattmiles.bsky.social @pinkastrophysicist.bsky.social
www.smh.com.au/national/a-s... @astromattmiles.bsky.social @pinkastrophysicist.bsky.social
Off to the OzGrav retreat/ECR workshop in Brisbane. I'm on a panel in the ECR workshop tomorrow on "making the most of OzGrav". Hopefully I can deliver some insight!
December 8, 2024 at 7:12 AM
Off to the OzGrav retreat/ECR workshop in Brisbane. I'm on a panel in the ECR workshop tomorrow on "making the most of OzGrav". Hopefully I can deliver some insight!
Reposted by Ryan Shannon
I made this website for the MeerKAT PTA. Check it out! mpta-gw.github.io
MPTA
mpta-gw.github.io
December 5, 2024 at 2:25 AM
I made this website for the MeerKAT PTA. Check it out! mpta-gw.github.io
Another day, another PTA result. This from Murriyang:
A novel way to search for axion dark matter by looking for fluctuations in polarisation position angle in pulsars
arxiv.org/abs/2412.02229
A novel way to search for axion dark matter by looking for fluctuations in polarisation position angle in pulsars
arxiv.org/abs/2412.02229
First Pulsar Polarization Array Limits on Ultralight Axion-like Dark Matter
We conduct the first-ever Pulsar Polarization Array (PPA) analysis to detect the ultralight Axion-Like Dark Matter (ALDM) using the polarization data of 22 millisecond pulsars from the third data rele...
arxiv.org
December 4, 2024 at 7:24 AM
Another day, another PTA result. This from Murriyang:
A novel way to search for axion dark matter by looking for fluctuations in polarisation position angle in pulsars
arxiv.org/abs/2412.02229
A novel way to search for axion dark matter by looking for fluctuations in polarisation position angle in pulsars
arxiv.org/abs/2412.02229
When we started MSP precision timing with MeerKAT in 2018, we knew it would be a fantastic telescope for a pulsar timing array, but did not know when it would become sensitive to gravitational waves. The timing baseline with MeerKAT would always be much shorter than other established PTAs.
December 3, 2024 at 6:25 AM
When we started MSP precision timing with MeerKAT in 2018, we knew it would be a fantastic telescope for a pulsar timing array, but did not know when it would become sensitive to gravitational waves. The timing baseline with MeerKAT would always be much shorter than other established PTAs.
Reposted by Ryan Shannon
For the past few years I've been leading the first gravitational wave searches with the MeerKAT Pulsar Timing Array (mpta-gw.github.io/index.html).
It's been an incredibly rewarding experience, and today the research is published!
It's been an incredibly rewarding experience, and today the research is published!
MPTA
mpta-gw.github.io
December 3, 2024 at 12:37 AM
For the past few years I've been leading the first gravitational wave searches with the MeerKAT Pulsar Timing Array (mpta-gw.github.io/index.html).
It's been an incredibly rewarding experience, and today the research is published!
It's been an incredibly rewarding experience, and today the research is published!