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Rotation of Low-Mass Stars in Upper Centaurus Lupus and Lower Centaurus Crux with TESS

Rebull, L. M. and Stauffer, J. R. and Hillenbrand, L. A. and Cody, A. M. and Kruse, Ethan and Powell, Brian P. (2022) Rotation of Low-Mass Stars in Upper Centaurus Lupus and Lower Centaurus Crux with TESS. . (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20220816-183020507

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Abstract

We present stellar rotation rates derived from Transiting Exoplanet Survey Satellite (TESS) light curves for stars in Upper Centaurus-Lupus (UCL; ~136 pc, ~16 Myr) and Lower Centaurus-Crux (LCC; ~115 pc, ~17 Myr). We find spot-modulated periods (P) for ~90% of members. The range of light curve and periodogram shapes echoes that found for other clusters with K2, but fewer multi-period stars may be an indication of different noise characteristics of TESS, or a result of the source selection methods here. The distribution of P as a function of color as a proxy for mass fits nicely in between that for both older and younger clusters observed by K2, with fast rotators found among both the highest and lowest masses probed here, and a well-organized distribution of M star rotation rates. About 13% of the stars have an infrared (IR) excess, suggesting a circumstellar disk; this is well-matched to expectations, given the age of the stars. There is an obvious pile-up of disked M stars at P~2 days, and the pile-up may move to shorter P as the mass decreases. There is also a strong concentration of disk-free M stars at P~2 days, hinting that perhaps these stars have recently freed themselves from their disks. Exploring the rotation rates of stars in UCL/LCC has the potential to help us understand the beginning of the end of the influence of disks on rotation, and the timescale on which the star responds to unlocking.


Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/2205.13083arXivDiscussion Paper
ORCID:
AuthorORCID
Rebull, L. M.0000-0001-6381-515X
Stauffer, J. R.0000-0003-3595-7382
Cody, A. M.0000-0002-3656-6706
Kruse, Ethan0000-0002-0493-1342
Powell, Brian P.0000-0003-0501-2636
Additional Information:Attribution 4.0 International (CC BY 4.0). 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 TESS mission. Funding for the TESS mission is provided by the NASA Explorer Program. 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 the VizieR catalogue access tool, CDS, Strasbourg, France (DOI : 10.26093/cds/vizier). The original description of the VizieR service was published in 2000, A&AS 143, 23. 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 Wide-field 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. Facility: K2, 2MASS, WISE, IRSA, Exoplanet Archive
Group:Astronomy Department, Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
NASANNX09AF08G
NASA/JPL/CaltechUNSPECIFIED
NSFUNSPECIFIED
Record Number:CaltechAUTHORS:20220816-183020507
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20220816-183020507
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:116307
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:16 Aug 2022 22:20
Last Modified:16 Aug 2022 22:20

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