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 (7) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (2)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
BPM 24754: A new Southern ZZ Ceti star
Authors:
Giovannini, O.; Kepler, S. O.; Kanaan, A.; Costa, A. F. M.; Koester, D.
Affiliation:
AA(Instituto de Fisica, Universidade Federal do Rio Grande do Sul, CEP 91501-970, Porto Alegre - RS, Brazil), AB(Instituto de Fisica, Universidade Federal do Rio Grande do Sul, CEP 91501-970, Porto Alegre - RS, Brazil), AC(Instituto de Fisica, Universidade Federal do Rio Grande do Sul, CEP 91501-970, Porto Alegre - RS, Brazil), AD(Instituto de Fisica, Universidade Federal do Rio Grande do Sul, CEP 91501-970, Porto Alegre - RS, Brazil), AE(Institut für Astronomie und Astrophysik, Universität Kiel, D-24098 Kiel, Germany)
Publication:
Astronomy and Astrophysics, v.329, p.L13-L16 (1998) (A&A Homepage)
Publication Date:
01/1998
Origin:
A&A
Astronomy Keywords:
STARS: INDIVIDUAL: BPM 24754, STARS: VARIABLES: OTHER, STARS: OSCILLATIONS, STARS: FUNDAMENTAL PARAMETERS, WHITE DWARFS
Bibliographic Code:
1998A&A...329L..13G

Abstract

We report the discovery of a new long--period ZZ Ceti star through the analysis of photometric time series gathered on 7 nights between 1995 and 1996. The light curve displays a periodic variation with a period of ~ 18 min in white light and the frequency analysis reveals a low frequency peak at ~ 0.92 mHz with an amplitude varying from 0.007 to 0.025 mag present every night. BPM 24754 is the 28th known ZZ Ceti star and it has the second longest period. We have also determined its atmospheric parameters using line profile fitting and its mass using white dwarf evolutionary models. BPM 24754 has Teff = 12,900 +/- 320 K, log g = 8.04 +/- 0.08, and M = 0.63 +/- 0.04 Msun. We compare its Teff in relation to the ZZ Ceti instability strip. Based on observations obtained at the Laboratório Nacional de Astrof\'{\i

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)
  New!

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