activity
20132026
most citedEvolution of the radius valley around low mass stars from and

167 citations · 2.6k across the 78 of their papers we have counts for

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7 papers · 1 filter

astro-ph.SR2023★ 1 cited

Comprehensive High-resolution Chemical Spectroscopy of Barnard's Star with SPIRou

Farbod Jahandar, René Doyon, Étienne Artigau +17

Determination of fundamental parameters of stars impacts all fields of astrophysics, from galaxy evolution to constraining the internal structure of exoplanets. This paper presents…

astro-ph.SR2023

Magnetic fields & rotation periods of M dwarfs from SPIRou spectra

J. -F. Donati, L. T. Lehmann, P. I. Cristofari +17

We present near-infrared spectropolarimetric observations of a sample of 43 weakly- to moderately-active M dwarfs, carried with SPIRou at the Canada-France-Hawaii Telescope in the…

astro-ph.SR2023★ 21 cited

Optical and near-infrared stellar activity characterization of the early M dwarf Gl~205 with SOPHIE and SPIRou

P. Cortes-Zuleta, I. Boisse, B. Klein +41

The stellar activity of M dwarfs is the main limitation for discovering and characterizing exoplanets orbiting them since it induces quasi-periodic RV variations. We aim to charact…

astro-ph.SR2020★ 122 cited

Three Years of HARPS-N High-Resolution Spectroscopy and Precise Radial Velocity Data for the Sun

X. Dumusque, M. Cretignier, D. Sosnowska +35

The solar telescope connected to HARPS-N has been observing the Sun since the summer of 2015. Such high-cadence, long-baseline data set is crucial for understanding spurious radial…

astro-ph.SR2020★ 49 cited

Spin-orbit alignment and magnetic activity in the young planetary system AU Mic

E. Martioli, G. Hebrard, C. Moutou +21

We present high resolution near-infrared spectropolarimetric observations using the SPIRou instrument at CFHT during a transit of the recently detected young planet AU Mic b, with…

astro-ph.SR2016★ 19 cited

The Matryoshka Disk: Keck/NIRC2 Discovery of a Solar System-Scale, Radially Segregated Residual Protoplanetary Disk Around HD 141569A

Thayne Currie, Carol Grady, Ryan Cloutier +7

Using Keck/NIRC2 (3.78 ) data, we report the direct imaging discovery of a scattered light-resolved, solar system-scale residual protoplanetary disk around the young…

astro-ph.SR2014★ 30 cited

A Deep Spitzer Survey of Circumstellar Disks in the Young Double Cluster, h and chi Persei

Ryan Cloutier, Thayne Currie, George Rieke +3

We analyze very deep IRAC and MIPS photometry of 12,500 members of the 14 Myr old Double Cluster, h and Persei, building upon on our earlier, shallower Spitzer studies (…