A First Look at the X-ray Population of the Young Massive Cluster VVV CL077
Arash Bodaghee (1,2), John A. Tomsick (1), Francesca Fornasini (1),, Farid Rahoui (3,4), Franz E. Bauer (5,6,7) ((1) SSL-UC Berkeley, (2) Georgia, College, (3) ESO, (4) Harvard University, (5) PUC Chile, (6) Millennium, Institute of Astrophysics, (7) Space Science Institute)

TL;DR
This study presents the first multi-wavelength analysis of the young massive cluster VVV CL077, revealing X-ray emitting stellar members, diffuse X-ray emission, and characteristics consistent with massive O stars, suggesting a distant location in the Norma Arm.
Contribution
First multi-wavelength analysis of VVV CL077, identifying X-ray sources, diffuse emission, and spectral features of massive stars, providing insights into its structure and distance.
Findings
Detected three X-ray stellar members.
Identified diffuse X-ray emission extending from the cluster.
Estimated the cluster's distance and physical properties.
Abstract
Multi-wavelength analysis of the young massive cluster VVV CL077 is presented for the first time. Our Chandra survey of this region enabled the detection of three X-ray emitting stellar members of the cluster, as well as a possible diffuse X-ray component that extends a few arcseconds from the cluster core with an intrinsic flux of (9+/-3)x10^-14 erg cm^-2 s^-1 in the 0.5-10 keV band. Infrared spectra we obtained for two of these X-ray point sources show absorption lines typical of the atmospheres of massive O stars. The X-ray spectrum from the visible extent of VVV CL077 i.e., a 15"-radius around the cluster, can be modeled with an absorbed power law with nH = (6+/-4)x10^22 cm^-2 and gamma = 2+/-1. In addition, the X-ray core of VVV CL077 coincides with diffuse emission seen in the infrared band and with a local maximum in the radio continuum map. A possible association with a…
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