Ryan Terrien (@rcterrien) profile picture

Ryan Terrien

@rcterrien

Astronomer, Asst Prof at Carleton College. Interested in exoplanets, M dwarfs, instrumentation, education.

 Northfield, MN
Joined March 2009
  • Tweets29
  • Following239
  • Followers94
The Carleton College Physics & Astro dept is searching for a tenure-track astronomer! Review of applications starts Sep 15. Come work with us! carleton.wd1.myworkdayjobs.c…
11
2
15
4,044
The Carleton Physics & Astro department is hiring multiple visiting assistant professors for next year! Please share with anyone who might be interested. careers.carleton.edu/en-us/j…
1
1
2
7
Note that "the department anticipates filling a tenure-track astrophysicist position in the next few years and encourages visiting applicants that may be interested in that position."
1
1
Review of applications begins Feb 11. Come work with us!
Congratulations to @gummiks on receiving the Trumpler award for his PhD Thesis! science.psu.edu/news/graduat… @NEID_at_WIYN @HPFspectrograph @PSU_CEHW @PSU_CEHW @AstrobiologyPsu @WIYNObservatory @mcdonaldobs @PSUScience
Center for Exoplanets and Habitable Worlds (@PSU_CEHW) profile pictureCenter for Exoplanets and Habitable Worlds@PSU_CEHW25 Aug 2021
Congratulations to @gummiks on winning the 2020 Robert J. Trumpler Award for his PhD dissertation, "Extreme Precision Photometry and Radial Velocimetry from the Ground"! astrosociety.org/who-we-are/…
2
5
11
paper day!!! arxiv.org/abs/2108.05358 me, @gummiks, and many others pointed Palomar/WIRC and @HPFspectrograph at the young (23 Myr old) planets in the V1298 Tau system, hunting for metastable helium absorption. here's what we found (1/n)
A Search for Planetary Metastable Helium Absorption in the V1298 Tau System

A Search for Planetary Metastable Helium Absorption in the V1298 Tau System

Early in their lives, planets endure extreme amounts of ionizing radiation from their host stars. For planets with primordial hydrogen and helium-rich envelopes, this can lead to substantial mass...

arxiv.org
1
13
1
60
Almost five years to the day #NASA selected the @NEID_at_WIYN spectrometer design, NEID has started its scientific mission! The tool will use high-precision radial velocity to discover and characterize exoplanets; #NExScI is hosting the data archive. ipac.caltech.edu/news/from-t…
From the Sun to the stars

From the Sun to the stars

A journey of exoplanet discovery begins as Penn State’s NEID spectrometer starts its scientific mission.

ipac.caltech.edu
3
4
I made a quick video explaining how to pronounce Tohono O’odham: We’re you saying it right? Can you inform the rest of Arizona? Thanks. 😘 You’re the best! vm.tiktok.com/ZMdhDCV8Q/ – at Casas Adobes, AZ
32
129
30
389
Ryan Terrien retweeted
HPF (@HPFspectrograph) profile picture
HPF@HPFspectrograph15 Jun 2021
Join the whole HPF team in congratulating Scott Diddams, AJ Metcalf, and Connor Fredrick on winning the IEEE Laser Instrumentation Award! sites.psu.edu/hzpf/2021/06/1…
3
1
3
Ryan Terrien retweeted
Jack Lubin (@LubysLemmas) profile picture
Jack Lubin@LubysLemmas18 May 2021
Today is my first, first-author paper day of grad school! I’m very excited to share what I’ve been working on: “Stellar Activity Manifesting at a One Year Alias Explains Barnard b as a False Positive”. Check out the accepted manuscript on arxiv: arxiv.org/abs/2105.07005
3
10
1
58
Interested in precise calibration for Doppler exoplanet detection? Check out our recent work, which shows laser frequency comb-enabled measurements of a Fabry-Pérot etalon! arxiv.org/abs/2103.08456
HPF (@HPFspectrograph) profile pictureHPF@HPFspectrograph6 May 2021
New on the HPF blog: laser frequency combs are great, but can we get similar results with simpler tech? Interesting results from @rcterrien and the team. hpf.psu.edu/2021/05/06/wavel…

Wavelength-dependent behavior of the HPF Fabry-Pérot

The need for a good ruler HPF is a high-precision spectrograph; it is designed to make very precise measurements of the wavelengths of stellar spectral features, so that the subtle Doppler shifts r…

hpf.psu.edu
1
3
1
7
more replies
This work also showcases the power of modern Doppler spectrographs for precision metrology. We used our *astronomical* spectrograph to make a world-class (broadband, long-term) measurement of the stability of a little piece of glass. Kinda cool, right?
1
1
We are excited to keep learning more about the calibration sources for HPF, NEID, and other systems! And I am fortunate to have many awesome collaborators on this work, including @SuvrathM @ChadFBender @gummiks and many others!
Ryan Terrien retweeted
SSE (@sse_evolution) profile picture
SSE@sse_evolution29 Apr 2021
Congratulations to Amanda Hund and Rosana Zenil-Ferguson, who received Honorable Mention in the 2021 Dobzhansky Prize competition! @roszenil @amandahund evolutionsociety.org/news/di…
2021 Dobzhansky Prize Honorable Mention Amanda Hund and Rosana Zenil-Ferguson

ALT 2021 Dobzhansky Prize Honorable Mention Amanda Hund and Rosana Zenil-Ferguson

8
1
55
A NASA Award today for the NEID Team! Looking forward to the restart of on-sky commissioning activities in the days ahead! #WIYNObservatory #NEID_at_WIYN #PSUScience
WIYN Observatory (@WIYNObservatory) profile pictureWIYN Observatory@WIYNObservatory1 Dec 2020
Congratulations to the NEID team on their NASA Group Achievement Award!! "For the development and delivery of the state of the art NEID radial velocity spectrograph and port adapter to the WIYN 3.5-meter telescope on Kitt Peak." 🥳
5
12
Awesome new paper up by @jasonleecurtis_ et al. on gyrochronology: arxiv.org/abs/2010.02272 It's a monster effort by Jason to explore spin rates at 3 Gyr across a wide range of ages using TESS+clusters. There's so much in here it's hard to know where to start!
When Do Stalled Stars Resume Spinning Down? Advancing...

When Do Stalled Stars Resume Spinning Down? Advancing...

Recent measurements of rotation periods ($P_\text{rot}$) in the benchmark open clusters Praesepe (670 Myr), NGC 6811 (1 Gyr), and NGC 752 (1.4 Gyr) demonstrate that, after converging onto a tight...

arxiv.org
1
8
1
16
Excited to share our ⚠️new paper⚠️! Our paper on the characterization of the young Neptune-sized planet K2-25b has been accepted for publication in the Astronomical Journal, and is on arXiv: arxiv.org/abs/2007.12766 Press releases and twitter thread below !
Artist impression of K2-25b. Credit: NOIRLab/NSF/AURA/J. Pollard

ALT Artist impression of K2-25b. Credit: NOIRLab/NSF/AURA/J. Pollard

2
5
2
23
Really exciting precision radial velocities in the near-infrared shown in this paper with the Infrared Doppler Instrument (IRD) on the @SubaruTelescope ! Congrats to the IRD team !
arXiver (@arXiver) profile picturearXiver@arXiver23 Jul 2020
Precision Radial Velocity Measurements by the Forward Modeling Technique in the Near Infrared [EPA] arxiver.moonhats.com/2020/07…
Image from arXiver (@arXiver)
1
3
What is your favorite Astro/physics trivia question? I am looking for interesting or silly questions for a fun multiple choice quiz.
1
My favorite question last week had to do with Tycho Brahe's pet moose!
1
Load more