The weak-line T Tauri star V410Tau I. A multi-wavelength study of variability

Details The weak-line T Tauri star V410Tau I. A multi-wavelength study of variability The weak-line T Tauri star V410Tau I. A multi-wavelength study of variability

2003-09-11

arxiv.org/abs/astro-ph/0309314v1

Astron.Astrophys.411:517-532,2003; Astron.Astrophys.427:263-278,2004

Astronomy and Astrophysics

Astrophysics

16 pages, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20034463

We present the results of an intensive coordinated monitoring campaign in the optical and X-ray wavelength ranges of the low-mass, pre-main sequence star V410Tau carried out with the aim to study the relation between various indicators for magnetic activity that probe emission from different atmospheric layers: optical photometric star spot (rotation) cycle, chromospheric Halpha emission, and coronal X-rays. Two X-ray pointings were carried out with the Chandra satellite simultaneously with the optical observations, and centered near the maximum and minimum levels of the optical lightcurve. A relation of their different count levels to the rotation period of the dominating spot is not confirmed by a third Chandra observation carried out some months later, during another minimum of the 1.87d cycle. Similarly we find no indications for a correlation of the Halpha emission with the spots' rotational phase. The extraordinary stability of the largest spot is confirmed by long-term photometric and radial velocity measurements. Joining our optical photometry with previous data we provide a new estimate for the dominant periodicity of V410Tau. This updated value removes systematic offsets of the time of minimum observed in data taken over the last decade. Furthermore, the combination of the new data with published measurements taken during the last decade allows us to examine long-term changes in the mean light level of the photometry of V410Tau. A variation on the timescale of 5.4yr is suggested. Assuming that this behavior is truely cyclic V410Tau is the first pre-main sequence star on which an activity cycle is detected.

Affiliated with

Also associated with

No associations

Rating

The weak-line T Tauri star V410Tau I. A multi-wavelength study of variability 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 weak-line T Tauri star V410Tau I. A multi-wavelength study of variability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The weak-line T Tauri star V410Tau I. A multi-wavelength study of variability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-109194