The He-shell flash in action: T Ursae Minoris revisited

Details The He-shell flash in action: T Ursae Minoris revisited The He-shell flash in action: T Ursae Minoris revisited

2002-11-13

arxiv.org/abs/astro-ph/0211284v1

Astron.Astrophys.398:277-282,2003

Astronomy and Astrophysics

Astrophysics

6 pages, 7 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20021646

We present an updated and improved description of the light curve behaviour of T Ursae Minoris, which is a Mira star with the strongest period change (the present rate is an amazing -3.8+/-0.4 days/year corresponding to a relative decrease of about 1% per cycle). Ninety years of visual data were collected from all available databases and the resulting, almost uninterrupted light curve was analysed with the O-C diagram, Fourier analysis and various time-frequency methods. The Choi-Williams and Zhao-Atlas-Marks distributions gave the clearest image of frequency and light curve shape variations. A decrease of the intensity average of the light curve was also found, which is in accordance with a period-luminosity relation for Mira stars. We predict the star will finish its period decrease in the meaningfully near future (c.c. 5 to 30 years) and strongly suggest to closely follow the star's variations (photometric, as well as spectroscopic) during this period.

Affiliated with

Also associated with

No associations

Rating

The He-shell flash in action: T Ursae Minoris revisited 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 The He-shell flash in action: T Ursae Minoris revisited, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The He-shell flash in action: T Ursae Minoris revisited will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-293529