On the period history of chi Cygni

Details On the period history of chi Cygni On the period history of chi Cygni

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...342..167s&link_type=abstract

Astronomy and Astrophysics, v.342, p.167-172 (1999)

Astronomy and Astrophysics

Astrophysics

13

Stars: Individual: Hd 187796, Stars: Oscillations, Stars: Agb And Post-Agb

Scientific paper

We discuss the light variability of the Mira variable chi Cygni, present a homogeneous set of times of minimum and maximum light since its discovery date in 1686, and analyse the variations of the pulsation period. There is a substantial cycle-to-cycle variation in the pulsations (standard error ~ 6fd5 ) with quite strong evidence for a linearly increasing period. Quasi-cyclic patterns in the O-C diagrams are visible, but there is no compelling evidence that these apparent cyclic period changes are real since the residuals left after fitting a linear period increase plus intrinsic period scatter have properties consistent with being white noise. The Lombard frequency domain test for a changing period applied to the residuals also gives unconvincing significance levels. The low gradient of the luminosity change with period is compatible with the star undergoing a rise in luminosity when H shell-burning takes over.

Affiliated with

Also associated with

No associations

Rating

On the period history of chi Cygni 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 On the period history of chi Cygni, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the period history of chi Cygni will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1027721