Radio observations of massive stars in the Galactic centre: The Arches Cluster
arXiv:2101.05048 · doi:10.1051/0004-6361/202039172
Abstract
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 (JVLA). 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 (CWB), 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.
Accepted for publication by A&A
References in corpus (12)
- Modules for Experiments in Stellar Astrophysics (MESA)
- Improving PARSEC models for very low mass stars
- Southern Massive Stars at High Angular Resolution: Observational Campaign and Companion Detection
- New PARSEC evolutionary tracks of massive stars at low metallicity: testing canonical stellar evolution in nearby star forming dwarf galaxies
- The most massive stars in the Arches cluster
- Star Formation in the Central 400 pc of the Milky Way: Evidence for a Population of Massive YSOs
- Constraining the thermally-pulsing asymptotic giant branch phase with resolved stellar populations in the Small Magellanic Cloud
- Radio Measurements of the stellar proper motions in the core of the Orion Nebula Cluster
- GALACTICNUCLEUS: A high-angular-resolution JHKs imaging survey of the Galactic centre III. Evidence for wavelength dependence of the extinction curve in the near-infrared
- First results from a large-scale proper motion study of the Galactic Centre
- The Arches cluster revisited. III. An addendum to the stellar census
- A VLBI study of the wind-wind collision region in the massive multiple HD 167971