SIMBAD references

2019AJ....157...29H - Astron. J., 157, 29-29 (2019/January-0)

Winds of massive stars: high-resolution X-ray spectra of stars in NGC 3603.


Abstract (from CDS):

The cluster NGC 3603 hosts some of the most massive stars in the Galaxy. With a modest 50 ks exposure with the Chandra High Energy Grating Spectrometer, we have resolved emission lines in spectra of several of the brightest cluster members, which are of WNh and O spectral types. This observation provides our first definitive high-resolution spectra of such stars in this nearby starburst region. The stars studied have broadened X-ray emission lines, some with blueshifted centroids, and are characteristic of massive stellar winds with terminal velocities around 2000-3000kms–1. X-ray luminosities and plasma temperatures are very high for both the WNh and O-stars studied. We conclude that their X-rays are likely the result of colliding winds.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: early-type - stars: massive - stars: winds, outflows - stars: Wolf-Rayet - X-rays: stars

Simbad objects: 21

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