| | |
| | |
Stat |
Members: 3643 Articles: 2'488'730 Articles rated: 2609
29 March 2024 |
|
| | | |
|
Article overview
| |
|
Gravity-mode period spacings as seismic diagnostic for a sample of gamma Doradus stars from Kepler space photometry and high-resolution ground-based spectroscopy | T. Van Reeth
; A. Tkachenko
; C. Aerts
; P. I. Papics
; S. A. Triana
; K. Zwintz
; P. Degroote
; J. Debosscher
; S. Bloemen
; V. S. Schmid
; K. De Smedt
; Y. Fremat
; A. S. Fuentes
; W. Homan
; M. Hrudkova
; R. Karjalainen
; R. Lombaert
; P. Nemeth
; R. Oestensen
; G. Van De Steene
; J. Vos
; G. Raskin
; H. Van Winckel
; | Date: |
8 Apr 2015 | Abstract: | Gamma Doradus stars (hereafter gamma Dor stars) are gravity-mode pulsators of
spectral type A or F. Such modes probe the deep stellar interior, offering a
detailed fingerprint of their structure. Four-year high-precision space-based
Kepler photometry of gamma Dor stars has become available, allowing us to study
these stars with unprecedented detail. We selected, analysed, and characterized
a sample of 67 gamma Dor stars for which we have Kepler observations available.
For all the targets in the sample we assembled high-resolution spectroscopy to
confirm their F-type nature. We found fourteen binaries, among which four
single-lined binaries, five double-lined binaries, two triple systems and three
binaries with no detected radial velocity variations. We estimated the orbital
parameters whenever possible. For the single stars and the single-lined
binaries, fundamental parameter values were determined from spectroscopy. We
searched for period spacing patterns in the photometric data and identified
this diagnostic for 50 of the stars in the sample, 46 of which are single stars
or single-lined binaries. We found a strong correlation between the
spectroscopic vsini and the period spacing values, confirming the influence of
rotation on gamma Dor-type pulsations as predicted by theory. We also found
relations between the dominant g-mode frequency, the longest pulsation period
detected in series of prograde modes, vsini, and log Teff. | Source: | arXiv, 1504.2119 | 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 claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |