TY  - JOUR
A1  - Meibom, S.
A1  - Barnes, Sydney A.
A1  - Covey, K.
A1  - Jeffries, R. D.
A1  - Matt, S.
A1  - Morin, J.
A1  - Palacios, A.
A1  - Reiners, A.
A1  - Sicilia-Aguilar, A.
A1  - Irwin, J.
T1  - Angular momentum evolution of cool stars: Toward a synthesis of observations and theory before and after the ZAMS
JF  - Astronomische Nachrichten = Astronomical notes
N2  - The coexistence of fast and slowly rotating cool stars in ZAMS clusters - forming distinct sequences in the color vs. rotation period plane - is providing clues to differences in their pre main-sequence angular momentum evolution. This Cool Stars 17 splinter was dedicated to a discussion of new observational and theoretical results that may help discriminate between proposed mechanisms for early angular momentum regulation and help us explain the observed ZAMS dichotomy.
KW  - circumstellar matter
KW  - stars: late-type
KW  - stars: magnetic fields
KW  - stars: pre-main sequence
KW  - stars: rotation
Y1  - 2013
U6  - https://doi.org/10.1002/asna.201211777
SN  - 0004-6337
SN  - 1521-3994
VL  - 334
IS  - 1-2
SP  - 168
EP  - 171
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Oskinova, Lida
A1  - Sun, W.
A1  - Evans, C. J.
A1  - Henault-Brunet, V.
A1  - Chu, Y.-H.
A1  - Gallagher, J. S.
A1  - Guerrero, Martín A.
A1  - Gruendl, R. A.
A1  - Güdel, M.
A1  - Silich, S.
A1  - Chen, Y.
A1  - Naze, Y.
A1  - Hainich, Rainer
A1  - Reyes-Iturbide, J.
T1  - Discovery of x-ray emission from young suns in the small magellanic  cloud
JF  - The astrophysical journal : an international review of spectroscopy and astronomical physics
N2  - We report the discovery of extended X-ray emission within the young star cluster NGC 602a in the Wing of the Small Magellanic Cloud (SMC) based on observations obtained with the Chandra X-Ray Observatory. X-ray emission is detected from the cluster core area with the highest stellar density and from a dusty ridge surrounding the H II region. We use a census of massive stars in the cluster to demonstrate that a cluster wind or wind-blown bubble is unlikely to provide a significant contribution to the X-ray emission detected from the central area of the cluster. We therefore suggest that X-ray emission at the cluster core originates from an ensemble of low-and solar-mass pre-main-sequence (PMS) stars, each of which would be too weak in X-rays to be detected individually. We attribute the X-ray emission from the dusty ridge to the embedded tight cluster of the newborn stars known in this area from infrared studies. Assuming that the levels of X-ray activity in young stars in the low-metallicity environment of NGC 602a are comparable to their Galactic counterparts, then the detected spatial distribution, spectral properties, and level of X-ray emission are largely consistent with those expected from low-and solar-mass PMS stars and young stellar objects (YSOs). This is the first discovery of X-ray emission attributable to PMS stars and YSOs in the SMC, which suggests that the accretion and dynamo processes in young, low-mass objects in the SMC resemble those in the Galaxy.
KW  - Magellanic Clouds
KW  - ISM: bubbles
KW  - H II regions
KW  - stars: winds, outflows
KW  - stars: pre-main sequence
KW  - X-rays: stars
Y1  - 2013
U6  - https://doi.org/10.1088/0004-637X/765/1/73
SN  - 0004-637X
VL  - 765
IS  - 1
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -