A THIRD MASSIVE STAR COMPONENT IN THE {sigma} ORIONIS AB SYSTEM
Abstract
We report on the detection of a third massive star component in the {sigma} Orionis AB system, traditionally considered as a binary system. The system has been monitored by the IACOB Spectroscopic Survey of Northern Massive Stars program, obtaining 23 high-resolution FIES-NOT spectra with a time span of {approx}2.5 years. The analysis of the radial velocity curves of the two spectroscopic components observed in the spectra has allowed us to obtain the orbital parameters of the system, resulting in a high eccentric orbit (e {approx} 0.78) with an orbital period of 143.5 {+-} 0.5 days. This result implies the actual presence of three stars in the {sigma} Orionis AB system when combined with previous results obtained from the study of the astrometric orbit (with an estimated period of {approx}157 years).
- Authors:
-
- Instituto de Astrofisica de Canarias, E-38200 La Laguna, Tenerife (Spain)
- Centro de Astrobiologia (CSIC-INTA), P.O. Box 78, E-28691 Villanueva de la Canada, Madrid (Spain)
- Departamento de Fisica, Ingenieria de Sistemas y Teoria de la Senal, Universidad de Alicante, P.O. Box 99, E-03080 Alicante (Spain)
- Publication Date:
- OSTI Identifier:
- 21612628
- Resource Type:
- Journal Article
- Journal Name:
- Astrophysical Journal
- Additional Journal Information:
- Journal Volume: 742; Journal Issue: 1; Other Information: DOI: 10.1088/0004-637X/742/1/55; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; GALAXIES; ORBITS; RADIAL VELOCITY; STAR CLUSTERS; STARS; VELOCITY
Citation Formats
Simon-Diaz, S, Caballero, J A, and Lorenzo, J. A THIRD MASSIVE STAR COMPONENT IN THE {sigma} ORIONIS AB SYSTEM. United States: N. p., 2011.
Web. doi:10.1088/0004-637X/742/1/55; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
Simon-Diaz, S, Caballero, J A, & Lorenzo, J. A THIRD MASSIVE STAR COMPONENT IN THE {sigma} ORIONIS AB SYSTEM. United States. https://doi.org/10.1088/0004-637X/742/1/55; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)
Simon-Diaz, S, Caballero, J A, and Lorenzo, J. 2011.
"A THIRD MASSIVE STAR COMPONENT IN THE {sigma} ORIONIS AB SYSTEM". United States. https://doi.org/10.1088/0004-637X/742/1/55; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
@article{osti_21612628,
title = {A THIRD MASSIVE STAR COMPONENT IN THE {sigma} ORIONIS AB SYSTEM},
author = {Simon-Diaz, S and Caballero, J A and Lorenzo, J},
abstractNote = {We report on the detection of a third massive star component in the {sigma} Orionis AB system, traditionally considered as a binary system. The system has been monitored by the IACOB Spectroscopic Survey of Northern Massive Stars program, obtaining 23 high-resolution FIES-NOT spectra with a time span of {approx}2.5 years. The analysis of the radial velocity curves of the two spectroscopic components observed in the spectra has allowed us to obtain the orbital parameters of the system, resulting in a high eccentric orbit (e {approx} 0.78) with an orbital period of 143.5 {+-} 0.5 days. This result implies the actual presence of three stars in the {sigma} Orionis AB system when combined with previous results obtained from the study of the astrometric orbit (with an estimated period of {approx}157 years).},
doi = {10.1088/0004-637X/742/1/55; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},
url = {https://www.osti.gov/biblio/21612628},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 742,
place = {United States},
year = {Sun Nov 20 00:00:00 EST 2011},
month = {Sun Nov 20 00:00:00 EST 2011}
}