SIMBAD references

2019ApJ...874L..26H - Astrophys. J., 874, L26-L26 (2019/April-1)

The unexpected spectrum of the innermost ejecta of the red hypergiant VY CMa.

HUMPHREYS R.M., ZIURYS L.M., BERNAL J.J., GORDON M.S., HELTON L.A., ISHIBASHI K., JONES T.J., RICHARDS A.M.S. and VLEMMINGS W.

Abstract (from CDS):

Hubble Space Telescope/STIS spectra of the small clumps and filaments closest to the central star in VY CMa reveal that the very strong K I emission and TiO and VO molecular emission, long thought to form in a dusty circumstellar shell, actually originate in a few small clumps hundreds of au from the star. The K I lines are 10-20 times stronger in these nearest ejecta than on the star. The observations also confirm VO as a circumstellar molecule. In this Letter we discuss the spectra of the features, their motions and ages, and the identification of the molecular emission. The strength of the atomic and molecular features in the small clumps present an astrophysical problem for the excitation process. We show that the clumps must have a nearly clear line of sight to the star's radiation.

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

Journal keyword(s): circumstellar matter - ISM: molecules - line: identification - stars: individual: VY Canis Majoris - stars: massive - stars: mass-loss - stars: winds, outflows

Simbad objects: 5

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2019ApJ...874L..26H and select 'bookmark this link' or equivalent in the popup menu


2020.09.22-18:18:45

© Université de Strasbourg/CNRS

    • Contact