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Rotation of Low-mass Stars in Taurus with K2

Rebull, L. M. and Stauffer, J. R. and Cody, A. M. and Hillenbrand, L. A. and Bouvier, J. and Roggero, N. and David, T. J. (2020) Rotation of Low-mass Stars in Taurus with K2. Astronomical Journal, 159 (6). Art. No. 273. ISSN 1538-3881. https://resolver.caltech.edu/CaltechAUTHORS:20200526-142433014

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Abstract

We present an analysis of K2 light curves (LCs) from Campaigns 4 and 13 for members of the young (~3 Myr) Taurus association, in addition to an older (~30 Myr) population of stars that is largely in the foreground of the Taurus molecular clouds. Out of 156 of the highest-confidence Taurus members, we find that 81% are periodic. Our sample of young foreground stars is biased and incomplete, but nearly all stars (37/38) are periodic. The overall distribution of rotation rates as a function of color (a proxy for mass) is similar to that found in other clusters: the slowest rotators are among the early M spectral types, with faster rotation toward both earlier FGK and later M types. The relationship between period and color/mass exhibited by older clusters such as the Pleiades is already in place by Taurus age. The foreground population has very few stars but is consistent with the USco and Pleiades period distributions. As found in other young clusters, stars with disks rotate on average slower, and few with disks are found rotating faster than ~2 days. The overall amplitude of the LCs decreases with age, and higher-mass stars have generally lower amplitudes than lower-mass stars. Stars with disks have on average larger amplitudes than stars without disks, though the physical mechanisms driving the variability and the resulting LC morphologies are also different between these two classes.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.3847/1538-3881/ab893cDOIArticle
https://arxiv.org/abs/2004.04236arXivDiscussion Paper
ORCID:
AuthorORCID
Rebull, L. M.0000-0001-6381-515X
Stauffer, J. R.0000-0003-3595-7382
Cody, A. M.0000-0002-3656-6706
Bouvier, J.0000-0002-7450-6712
Roggero, N.0000-0003-4370-086X
David, T. J.0000-0001-6534-6246
Additional Information:© 2020 The American Astronomical Society. Received 2020 February 24; revised 2020 April 7; accepted 2020 April 8; published 2020 May 26. Some of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX09AF08G and by other grants and contracts. This paper includes data collected by the Kepler mission. Funding for the Kepler mission is provided by the NASA Science Mission directorate. This research has made use of the NASA/IPAC Infrared Science Archive (IRSA), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research has made use of NASA's Astrophysics Data System (ADS) Abstract Service, and of the SIMBAD database, operated at CDS, Strasbourg, France. This research has made use of data products from the Two-Micron All-Sky Survey (2MASS), which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center, funded by the National Aeronautics and Space Administration and the National Science Foundation. The 2MASS data are served by the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This publication makes use of data products from the Widefield Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. Facilities: 2MASS - , WISE - , IRSA - , Exoplanet Archive. -
Group:Astronomy Department, Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
NASANNX09AF08G
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords:Star formation; Stellar rotation; Starspots
Issue or Number:6
Classification Code:Unified Astronomy Thesaurus concepts: Star formation (1569); Stellar rotation (1629); Starspots (1572)
Record Number:CaltechAUTHORS:20200526-142433014
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200526-142433014
Official Citation:L. M. Rebull et al 2020 AJ 159 273
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103468
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:26 May 2020 21:55
Last Modified:26 May 2020 21:55

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