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Title: A BINARY ORBIT FOR THE MASSIVE, EVOLVED STAR HDE 326823, A WR+O SYSTEM PROGENITOR

Abstract

The hot star HDE 326823 is a candidate transition-phase object that is evolving into a nitrogen-enriched Wolf-Rayet star. It is also a known low-amplitude, photometric variable with a 6.123 day period. We present new, high- and moderate-resolution spectroscopy of HDE 326823, and we show that the absorption lines show coherent Doppler shifts with this period while the emission lines display little or no velocity variation. We interpret the absorption line shifts as the orbital motion of the apparently brighter star in a close, interacting binary. We argue that this star is losing mass to a mass gainer star hidden in a thick accretion torus and to a circumbinary disk that is the source of the emission lines. HDE 326823 probably belongs to a class of objects that produce short-period WR+O binaries.

Authors:
;
Publication Date:
OSTI Identifier:
22034325
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (New York, N.Y. Online)
Additional Journal Information:
Journal Volume: 142; Journal Issue: 6; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION; ACCRETION DISKS; AMPLITUDES; ASTRONOMY; BINARY STARS; DOPPLER EFFECT; EMISSION SPECTROSCOPY; MASS; NITROGEN; ORBITS; PHASE TRANSFORMATIONS; PHOTOMETRY; PHOTON EMISSION; RESOLUTION; STAR EVOLUTION; VARIATIONS; VELOCITY; WOLF-RAYET STARS

Citation Formats

Richardson, N D, Gies, D R, and Williams, S. J., E-mail: richardson@chara.gsu.edu, E-mail: gies@chara.gsu.edu, E-mail: swilliams@chara.gsu.edu. A BINARY ORBIT FOR THE MASSIVE, EVOLVED STAR HDE 326823, A WR+O SYSTEM PROGENITOR. United States: N. p., 2011. Web. doi:10.1088/0004-6256/142/6/201.
Richardson, N D, Gies, D R, & Williams, S. J., E-mail: richardson@chara.gsu.edu, E-mail: gies@chara.gsu.edu, E-mail: swilliams@chara.gsu.edu. A BINARY ORBIT FOR THE MASSIVE, EVOLVED STAR HDE 326823, A WR+O SYSTEM PROGENITOR. United States. https://doi.org/10.1088/0004-6256/142/6/201
Richardson, N D, Gies, D R, and Williams, S. J., E-mail: richardson@chara.gsu.edu, E-mail: gies@chara.gsu.edu, E-mail: swilliams@chara.gsu.edu. 2011. "A BINARY ORBIT FOR THE MASSIVE, EVOLVED STAR HDE 326823, A WR+O SYSTEM PROGENITOR". United States. https://doi.org/10.1088/0004-6256/142/6/201.
@article{osti_22034325,
title = {A BINARY ORBIT FOR THE MASSIVE, EVOLVED STAR HDE 326823, A WR+O SYSTEM PROGENITOR},
author = {Richardson, N D and Gies, D R and Williams, S. J., E-mail: richardson@chara.gsu.edu, E-mail: gies@chara.gsu.edu, E-mail: swilliams@chara.gsu.edu},
abstractNote = {The hot star HDE 326823 is a candidate transition-phase object that is evolving into a nitrogen-enriched Wolf-Rayet star. It is also a known low-amplitude, photometric variable with a 6.123 day period. We present new, high- and moderate-resolution spectroscopy of HDE 326823, and we show that the absorption lines show coherent Doppler shifts with this period while the emission lines display little or no velocity variation. We interpret the absorption line shifts as the orbital motion of the apparently brighter star in a close, interacting binary. We argue that this star is losing mass to a mass gainer star hidden in a thick accretion torus and to a circumbinary disk that is the source of the emission lines. HDE 326823 probably belongs to a class of objects that produce short-period WR+O binaries.},
doi = {10.1088/0004-6256/142/6/201},
url = {https://www.osti.gov/biblio/22034325}, journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 6,
volume = 142,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2011},
month = {Thu Dec 15 00:00:00 EST 2011}
}