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http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2256| Discovery of x-ray emission from young suns in the small magellanic cloud | |
| SERGIY SILICH | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Magellanic Clouds ISM: bubbles HII regions Stars: winds, outflows Stars: pre-main sequence X-rays: stars | |
| We report the discovery of extended X-ray emission within the young star cluster NGC602a 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 HII 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 new-born 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. | |
| The Astrophysical Journal | |
| 15-01-2013 | |
| Artículo | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Oskinova, L. M., et al., (2013). Discovery of x-ray emission from young suns in the small magellanic cloud, The Astrophysical Journal, Vol. 765(1):11-12 | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Artículos de Astrofísica |
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| Fichero | Tamaño | Formato | |
|---|---|---|---|
| 37. Discovery of X-Ray Emission from Young Suns in the Small Magellanic Cloud.pdf | 759.22 kB | Adobe PDF | Visualizar/Abrir |