Other
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aj....133.1421h&link_type=abstract
The Astronomical Journal, Volume 133, Issue 4, pp. 1421-1440 (2007).
Other
16
Stars: Early-Type, Stars: Fundamental Parameters, Stars: Oscillations, Stars: Variables: Other
Scientific paper
We have used precise photometric and high-dispersion spectroscopic observations to study 11 γ Doradus stars, 10 of them newly confirmed. Only five of these 11 γ Doradus stars appear to be single; two are primaries of double-lined spectroscopic binaries, one is the secondary of a double-lined binary, two are primaries of visual binaries and, in the case of the double-lined binary (HD 86371), either or both components could be a pulsating γ Doradus star. We have determined a preliminary orbital period of 5.32 days for the double-lined binary HD 41547. Several of the stars show spectroscopic line-profile and low-amplitude radial velocity variability indicative of pulsation. All 11 stars are photometrically variable with amplitudes between 4 and 94 mmag in Johnson B and periods between 0.38 and 1.86 days. The 11 stars have between two and five independent periods. The variability at all periods approximates a sinusoid. We provide a new tabulation of all 66 γ Doradus stars confirmed to date and list some of their properties. All are dwarfs or subgiants and lie within a well-defined region of the H-R diagram that overlaps the cool edge of the δ Scuti instability strip. Four of the new γ Doradus variables from this paper also lie within the δ Scuti instability strip but do not exhibit the additional higher frequency variability typical of δ Scuti stars. Among the 66 confirmed γ Doradus variables, we find no correlation between the period of the strongest pulsation mode and the (B - V) color index, absolute magnitude, or luminosity.
Fekel Francis C.
Henry Gregory W.
Henry Stephen M.
No associations
LandOfFree
Photometry and Spectroscopy of 11 γ Doradus Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Photometry and Spectroscopy of 11 γ Doradus Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometry and Spectroscopy of 11 γ Doradus Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1682261