Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (12) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (10)
· Reads History
·
· Translate This Page
Title:
A study of Carina OB2 association. 2: Analysis and discussion of the data
Authors:
Garcia, Beatriz
Affiliation:
AA(Complejo Astronomico EL Leoncito, San Juan, Argentina)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 436, no. 2, p. 705-719 (ApJ Homepage)
Publication Date:
12/1994
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
Astronomical Photometry, B Stars, Hertzsprung-Russell Diagram, O Stars, Star Clusters, Stellar Evolution, Astronomical Spectroscopy, Giant Stars, Spectrograms, Stellar Rotation, Supergiant Stars
DOI:
10.1086/174944
Bibliographic Code:
1994ApJ...436..705G

Abstract

UBV photometric data and accurate MK spectral types of stars in the region of Carina OB2 association, presented in Paper I, are used to show that Carina OB2 is a genuine stellar association located at a distance of 3.1 kpc from the Sun, and with an age of about 4 x 106 yr, in accordance with the bluest star on the main sequence. From the complete sample, a total of 91 O and B stars were retained as members of Carina OB2, while 66 stars were considered probable members. Among the members, there are two- early supergiant stars, three O-type stars, an 12 giants or subgiant B-type stars. For 37 stars in the field of the association we obtained between 3 and 10 spectrograms per star, and with these data we were able to derive preliminary orbital elements for three spectroscopic binaries and probable periods for two other stars. The ratio of average projected rotational velocity of the cluster members to that of field stars is 0.87 +/- 0.05. The average radial velocity for the group is -23 +/- 2(p.e.) km/s. We call attention to several peculiar stars, early-type SB1, and SB2 systems of potential astrophysical interest. Finally, we propose a global picture of the region where Carina OB2 is located and a preliminary analysis of the possible relation between the association and the other clusters present in this wonderful region of the southern sky.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints