Long Secondary Periods and Binarity in Red Giant Stars

Details Long Secondary Periods and Binarity in Red Giant Stars Long Secondary Periods and Binarity in Red Giant Stars

2007-01-16

arxiv.org/abs/astro-ph/0701463v1

Astrophys.J.660:1486-1491,2007

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures. Accepted for publication in ApJ

Scientific paper

10.1086/513012

Observational arguments supporting the binary explanation of the long secondary periods (LSP) phenomenon in red giants are presented. Photometry of about 1200 semiregular variables with the LSP in the Large Magellanic Cloud are analyzed using the MACHO and OGLE photometry. For about 5% of these objects additional ellipsoidal-like or eclipsing-like modulation with the same periods as the LSP is detectable. These double-humped variations are usually shifted in phase comparing to the LSP light curves. I discuss the model of binary system with a red giant as the primary component and a low-mass object as the secondary one. The mass lost by the red giant through the wind follows the spiral pattern in the orbit around the primary star and obscures it causing the LSP variations.

Affiliated with

Also associated with

No associations

Rating

Long Secondary Periods and Binarity in Red Giant 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 Long Secondary Periods and Binarity in Red Giant Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long Secondary Periods and Binarity in Red Giant Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-188284