Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...359..539d&link_type=abstract
Astronomy and Astrophysics, v.359, p.539-551 (2000)
Astronomy and Astrophysics
Astrophysics
16
Line: Profiles, Stars: Oscillations, Stars: Early-Type, Stars: Individual: Varepsilon Per, Stars: Binaries: Spectroscopic
Scientific paper
We present the analysis of 445 high signal-to-noise spectra of the Si III triplet at 4553 Ä, 4568 Ä, 4575 Ä of the line-profile variable star varepsilon Persei. The data were gathered during 14 consecutive nights and fully cover the orbital cycle of the binary. The orbital parameters that we derive from our data for the close binary are in full agreement with those found in 1995 by Tarasov et al. Our data does not offer a conclusive test of the presence of the 4156-d period. With the CLEAN-method, we identify 5 periods in the intensity variations across the line profiles, after the latter are corrected for the binary motion: 5.300, 5.890, 6.250, 6.875, and 10.585 c d-1. The results of our frequency analysis are consistent with previous ones based on the CLEAN algorithm. In terms of sinusoidal variations with constant phase, we thus find that the line-profile variations have a multiperiodic pattern. The Hipparcos photometry reveals yet another candidate frequency of 5.23280 c d-1. It is not clear yet if this frequency is connected to those found in the spectra. With the PDM-method, we find some indications leading to the ``super'' period P_super equiv 1 fd 11878, as introduced by Harmanec (1999). On the other hand, many other periods between 1 and 3 days are equally likely than P_super. Some of the frequencies found using CLEAN are integer submultiples of P_super. We do not have a sufficient amount of data to estimate the importance of tidal effects for the line-profile variability near periastron for varepsilon Persei. Based on observations obtained at the Observatoire de Haute Provence}
Aerts Christine
de Cat Peter
Mathias Ph.
Telting John
No associations
LandOfFree
A detailed spectroscopic analysis of varepsilon Per. I. Determination of the orbital parameters and of the frequencies 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 A detailed spectroscopic analysis of varepsilon Per. I. Determination of the orbital parameters and of the frequencies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A detailed spectroscopic analysis of varepsilon Per. I. Determination of the orbital parameters and of the frequencies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1717178