2024ApJ...962...16D

Query : 2024ApJ...962...16D

2024ApJ...962...16D - Astrophys. J., 962, 16 (2024/February-2)

Constraining Stellar Rotation at the Zero-age Main Sequence with TESS.

DOUGLAS S.T., CARGILE P.A., MATT S.P., BREIMANN A.A., PEREZ CHAVEZ J.A., HUANG C.X., WRIGHT N.J. and ZHOU G.

Abstract (from CDS):

The zero-age main sequence (ZAMS) is a critical phase for stellar angular momentum evolution, as stars transition from contraction-dominated spin-up to magnetic wind-dominated spin-down. We present the first robust observational constraints on rotation for FGK stars at ≈40 Myr. We have analyzed TESS light curves for 1410 members of five young open clusters with ages between 25 and 55 Myr: IC 2391, IC 2602, NGC 2451A, NGC 2547, and Collinder 135. In total, we measure 868 rotation periods, including 96 new, high-quality periods for stars around 1 M⊙. This is an increase of ten times the existing literature sample at the ZAMS. We then use the τ2 method to compare our data to models for stellar angular momentum evolution. Although the ages derived from these rotation models do not match isochronal ages, we show that these observations can clearly discriminate between different models for stellar wind torques. Finally, τ2 fits indicate that magnetic braking and/or internal angular momentum transport significantly impact rotational evolution even on the pre-main sequence.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Stellar rotation - Stellar evolution - Late-type stars - Open star clusters

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 85 GiG 00 21 25.5485207160 +22 30 42.255869364   14.9       ~ 32 0
2 NGC 869 OpC 02 18 57.0 +57 08 02           ~ 504 0
3 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
4 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
5 Cl Collinder 135 OpC 07 17 23.6 -36 57 23           ~ 124 0
6 * y Pup XB* 07 29 05.6951953008 -38 48 43.442359164   5.243 5.395     B3V 91 0
7 NGC 2451A OpC 07 42 55.4 -38 15 05           ~ 159 0
8 NGC 2457 G 07 54 54.4816935336 +55 32 47.039121708   15.6       ~ 15 0
9 NGC 2547 OpC 08 10 01.5 -49 12 08           ~ 445 0
10 NAME Vela X Psr 08 33 08.880 -45 11 24.36           ~ 302 1
11 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
12 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
13 V* V366 Vel BY* 08 41 25.8875436000 -53 22 41.467632456   13.63 12.519   11.277 K3e 44 0
14 V* V373 Vel BY* 08 43 27.7498717776 -52 57 39.097540332       14.12   ~ 26 0
15 2MASS J08432785-5257358 ** 08 43 27.85968 -52 57 35.8452           ~ 2 0
16 V* V372 Vel BY* 08 43 27.8600657448 -52 57 35.900992260       13.51   ~ 27 0
17 V* V374 Vel BY* 08 43 29.2915419936 -52 41 28.328512308   12.59       K0 23 0
18 HD 91895 ** 10 34 52.9014216236 -64 53 58.308152678   10.191 9.714 9.763   F6V 27 0
19 HD 92783 * 10 41 06.4151530080 -64 28 27.769312128   6.642 6.689     B9V 76 0
20 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
21 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
22 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1

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