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Gallego-Calvente, A. T.; Schödel, R.; Alberdi, A.; Herrero-Illana, R.; Najarro, F.; Yusef-Zadeh, F.; Dong, H.; Sanchez-Bermudez, J.; Shahzamanian, B.; Nogueras-Lara, F.; Gallego-Cano, E.
Astronomy and astrophysics (Berlin), 03/2021, Letnik: 647Journal Article
We present high-angular-resolution radio observations of the Arches cluster in the Galactic centre, one of the most massive young clusters in the Milky Way. The data were acquired in two epochs and at 6 and 10 GHz with the Karl G. Jansky Very Large Array. The rms noise reached is three to four times better than during previous observations and we have almost doubled the number of known radio stars in the cluster. Nine of them have spectral indices consistent with thermal emission from ionised stellar winds, one is a confirmed colliding wind binary, and two sources are ambiguous cases. Regarding variability, the radio emission appears to be stable on timescales of a few to ten years. Finally, we show that the number of radio stars can be used as a tool for constraining the age and/or mass of a cluster and also its mass function.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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