| | |
| | |
Stat |
Members: 3645 Articles: 2'504'928 Articles rated: 2609
25 April 2024 |
|
| | | |
|
Article overview
| |
|
Massive Stars in the Arches Cluster | Donald F. Figer
; Francisco Najarro
; Diane Gilmore
; Mark Morris
; Sungsoo S. Kim
; Eugene Serabyn
; Ian S. McLean
; Andrea M. Gilbert
; James R. Graham
; James E. Larkin
; N.A. Levenson
; Harry I. Teplitz
; | Date: |
7 Aug 2002 | Journal: | Astrophys.J. 581 (2002) 258-275 | Subject: | astro-ph | Affiliation: | 1,2), Francisco Najarro , Diane Gilmore , Mark Morris , Sungsoo S. Kim , Eugene Serabyn , Ian S. McLean , Andrea M. Gilbert , James R. Graham , James E. Larkin , N.A. Levenson , Harry I. Teplitz ( STScI, JHU, Instituto de Estructura de la Materia, | Abstract: | We present and use new spectra and narrow-band images, along with previously published broad-band images, of stars in the Arches cluster to extract photometry, astrometry, equivalent width, and velocity information. The data are interpreted with a wind/atmosphere code to determine stellar temperatures, luminosities, mass-loss rates, and abundances. We have doubled the number of known emission-line stars, and we have also made the first spectroscopic identification of the main sequence for any population in the Galactic Center. We conclude that the most massive stars are bona-fide Wolf-Rayet (WR) stars and are some of the most massive stars known, having M_{initial} > 100 Msun, and prodigious winds, Mdot > 10^{-5} Msun yr^{-1}, that are enriched with helium and nitrogen; with these identifications, the Arches cluster contains about 5% of all known WR stars in the Galaxy. We find an upper limit to the velocity dispersion of 22 kms^{-1}, implying an upper limit to the cluster mass of 7(10^4) Msun within a radius of 0.23 pc; we also estimate the bulk heliocentric velocity of the cluster to be v_{cluster,odot} approximately +95 kms^{-1}. | Source: | arXiv, astro-ph/0208145 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |