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Title: ON THE NATURE OF RAPIDLY ROTATING SINGLE EVOLVED STARS

Abstract

We present an analysis of the nature of the rapidly rotating, apparently single giant based on rotational and radial velocity measurements carried out by the CORAVEL spectrometers. From the analyzed sample, composed of 2010 spectroscopic, apparently single, evolved stars of luminosity classes IV, III, II, and Ib with spectral types G and K, we classified 30 stars that presented unusual, moderate to rapid rotation. This work reports, for the first time, the presence of these abnormal rotators among subgiant, bright giant, and Ib supergiant stars. To date, this class of stars was reported only among giant stars of luminosity class III. Most of these abnormal rotators present an IRAS infrared excess, which, in principle, can be related to dust around these stars.

Authors:
; ;  [1]
  1. Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, Campus Universitário, Natal RN (Brazil)
Publication Date:
OSTI Identifier:
22521388
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 801; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION SPECTROSCOPY; EMISSION SPECTROSCOPY; INFRARED SPECTRA; LUMINOSITY; RADIAL VELOCITY; ROTATION; STAR EVOLUTION; SUPERGIANT STARS

Citation Formats

Da Silva, R. Rodrigues, Canto Martins, B. L., and De Medeiros, J. R., E-mail: renan@dfte.ufrn.br. ON THE NATURE OF RAPIDLY ROTATING SINGLE EVOLVED STARS. United States: N. p., 2015. Web. doi:10.1088/0004-637X/801/1/54.
Da Silva, R. Rodrigues, Canto Martins, B. L., & De Medeiros, J. R., E-mail: renan@dfte.ufrn.br. ON THE NATURE OF RAPIDLY ROTATING SINGLE EVOLVED STARS. United States. doi:10.1088/0004-637X/801/1/54.
Da Silva, R. Rodrigues, Canto Martins, B. L., and De Medeiros, J. R., E-mail: renan@dfte.ufrn.br. Sun . "ON THE NATURE OF RAPIDLY ROTATING SINGLE EVOLVED STARS". United States. doi:10.1088/0004-637X/801/1/54.
@article{osti_22521388,
title = {ON THE NATURE OF RAPIDLY ROTATING SINGLE EVOLVED STARS},
author = {Da Silva, R. Rodrigues and Canto Martins, B. L. and De Medeiros, J. R., E-mail: renan@dfte.ufrn.br},
abstractNote = {We present an analysis of the nature of the rapidly rotating, apparently single giant based on rotational and radial velocity measurements carried out by the CORAVEL spectrometers. From the analyzed sample, composed of 2010 spectroscopic, apparently single, evolved stars of luminosity classes IV, III, II, and Ib with spectral types G and K, we classified 30 stars that presented unusual, moderate to rapid rotation. This work reports, for the first time, the presence of these abnormal rotators among subgiant, bright giant, and Ib supergiant stars. To date, this class of stars was reported only among giant stars of luminosity class III. Most of these abnormal rotators present an IRAS infrared excess, which, in principle, can be related to dust around these stars.},
doi = {10.1088/0004-637X/801/1/54},
journal = {Astrophysical Journal},
number = 1,
volume = 801,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}