Suvrath Mahadevan

87 posts

Suvrath Mahadevan

Suvrath Mahadevan

@SuvrathM

Beigetreten Haziran 2014
133 Folgt186 Follower
Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
A new planet in the habitable zone of its star, and less than 20 light years away, discovered with @HPFspectrograph and @NEID_at_WIYN . The stars are tricky and noisy at this level of detection, but our instruments and analysis techniques are also getting more sophisticated!
HPF@HPFspectrograph

We have discovered a super-Earth in the Habitable Zone of a very nearby star, GJ 251. The system is close enough to us that it could potentially be imaged by upcoming 30-meter telescopes. Study led by HPF team member Corey Beard hpf.psu.edu/2025/10/23/gj2…

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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
In the 60's Peter van De Kamp claimed the astrometric detection of a giant exoplanet - it was the telescope optics, not an exoplanet! Astrometry is hard. An opening of the floodgates (?) with confirmation of Gaia4b with @HPFspectrograph @NEID_at_WIYN using data from @ESAGaia
Guðmundur Stefánsson@gummiks

⚠️New paper!⚠️ We have discovered a planet, Gaia-4b, and a brown dwarf, Gaia-5b, using the @ESAGaia spacecraft. Gaia-4b is Gaia's first planet detected with astrometry alone and represents the tip-of-the-iceberg of the 100s-1000s of planets that Gaia is expected to detect.

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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
Congratulations to @ArvindFGupta for leading this discovery of the most eccentric transiting planet know using @NEID_at_WIYN @HPFspectrograph TESS, HARP-N. A beautiful and strange system amenable to further followup. @NOIRLabAstro @PSUScience @PSU_CEHW @PSUresearch @mcdonaldobs
Arvind Gupta@ArvindFGupta

Pausing my twitter hiatus to announce my new paper published in Nature today: nature.com/articles/s4158… We confirm and characterize TIC 241249530 b, a warm Jupiter on an eccentric & retrograde orbit, and we show that it is en route to becoming a hot Jupiter ⤵️

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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
NEID strikes! No fictional planets are safe. Sorry Vulcan! All part of our journey to better understand stellar activity and discover terrestrial worlds around the nearest stars. @NEID_at_WIYN @WIYNObservatory @PSUScience @AstroPSU @NASAJ
WIYN Observatory@WIYNObservatory

.@NASAJPL press release about the paper 'The Death of Vulcan: NEID Reveals That the Planet Candidate Orbiting HD 26965 Is Stellar Activity' led by PI Abigail Burrows using @NEID_at_WIYN data. @NOIRLabAstro @NOIRLabAstroES science.nasa.gov/universe/exopl…

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Keith Smith
Keith Smith@DrKeithSmith·
Stefansson (@gummiks) et al. have discovered an #exoplanet 13 times the mass of Earth orbiting an M dwarf star of only 0.1 solar masses. Such a high planet-to-star mass ratio is not predicted by planet formation theories. science.org/doi/10.1126/sc…
Keith Smith tweet media
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HPF
HPF@HPFspectrograph·
Big announcement on the HPF blog: our HPF exoplanet survey has discovered a Neptune-mass exoplanet on a close-in orbit around a very low-mass star. This planet challenges our understanding of planet formation around low-mass stars: sites.psu.edu/hzpf/2023/11/3…
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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
Another neat @HPFspectrograph discovery lead by @gummiks Paper available in @ScienceMagazine and the Penn State press release is here psu.edu/news/research/… @PSUScience @PSU_CEHW @mcdonaldobs
Guðmundur Stefánsson@gummiks

⚠️New paper!⚠️We discovered a Neptune-mass planet in a close-in orbit around a very low mass star. The planet is surprisingly massive for the low mass of its star, posing a challenge for how it might have formed. Paper is now available in @ScienceMagazine. Fig credit: @PSUScience

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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
An amazing result from @gully_ and team using our @HPFspectrograph. A huge leading tail detected in the near-infrared Helium 10830 Angstrom line. The more we study exoplanets the more amazing they seem to get! @mcdonaldobs @AstroPSU @PSUScience
gully@gully_

Hey! Check out my brand new paper! We discover a huge leading tail of Helium in HAT-P-67 b, an inflated hot Saturn, with up to 10% transit depth, and actively undergoing *runaway inflation*. arxiv.org/abs/2307.08959

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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
New discovery using @HPFspectrograph at the Hobby-Eberly Telescope. Giant tidal tails of Helium escaping a hot Jupiter! Neat work lead by @astrozjzhang. Enabled by both the high resolution NIR capabilities of HPF and the queue-scheduled HET! @PSUScience @AstroPSU @mcdonaldobs
Zhoujian (ZJ) Zhang@astrozjzhang

Super excited to share that we discovered GIANT tails of the helium escaping the hot Jupiter HAT-P-32b using @HPFspectrograph, and our study is published by @ScienceAdvances today! science.org/doi/10.1126/sc…

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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
Had a great time this week at ETH giving the Zurich Physics Colloquium! Always fun to discuss our planet detection techniques, and the challenges of detecting terrestrial mass exoplanets in Habitable Zones @DidierQueloz @NEID_at_WIYN @HPFspectrograph @ETH_physics
ETH Physics@ETH_physics

It is a great pleasure having today Suvrath Mahadevan (@SuvrathM) from @penn_state (left, with host @DidierQueloz, @ETH_physics) in the Zurich Physics Colloquium. #zhphyscoll colloquium.phys.ethz.ch/programme/curr… 📷 @HostettlerHeidi / @ETH_physics

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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
Nice graphic! Anyone can apply to use the high RV precision @NEID_at_WIYN for exoplanet science through the @NOIRLabAstro call. Enabling this capability for the community was one of our major motivations for building NEID (and of course we use it too!) @WIYNObservatory @usngo
US National Gemini Office@usngo

📢📢 The 23B @NOIRLabAstro Call for Proposals is out! Over 500 nights across 20+ telescopes. Deadline 03/31. noirlab.edu/science/observ… @NOIRLabAstroES @AURADC @AURADC @KittPeakNatObs @cerrotololo @GeminiObs @SubaruTelescope @keckobservatory @WIYNObservatory @LCOAstro @LCO_Global

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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
Neat measurement in this new paper by @AstroPSU senior Robert Frazier using @NEID_at_WIYN to determine the obliquity of the young star TOI-2076, which hosts a system of three transiting planets. @PSU_CEHW @WIYNObservatory @NOIRLabAstro @PSUScience
NEID@NEID_at_WIYN

New science on the NEID blog: what is obliquity? How do we measure it? And what is the obliquity of TOI-2076b, a recently-discovered young Neptune-sized exoplanet? Based on a publication led by Robert Frazier, data from @NOIRLabAstro @WIYNObservatory sites.psu.edu/neid/2023/02/2…

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WIYN Observatory
WIYN Observatory@WIYNObservatory·
Wrapping up another successful @NEID_at_WIYN observing run!
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Suvrath Mahadevan
Suvrath Mahadevan@SuvrathM·
NEID's first science-observation. Now published by @ArvindFGupta - an intriguing study in stellar p-modes, and their manifestation as noise sources for precision radial velocity. @NEID_at_WIYN
Arvind Gupta@ArvindFGupta

Really excited to finally share some cool results I've been working on! In this paper (arxiv.org/abs/2210.00544), we use @NEID_at_WIYN and @NASA_TESS data to look at how p-mode oscillations manifest as a source of correlated noise for precision RV measurements. Some highlights:

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Entdecken

@HPFspectrograph @NEID_at_WIYN @ESAGaia @ArvindFGupta @NOIRLabAstro @PSUScience @PSU_CEHW @PSUresearch