New Results on Age, Activity and Chemical Composition of the Open Clusters NGC 2451 A and B

Details New Results on Age, Activity and Chemical Composition of the Open Clusters NGC 2451 A and B New Results on Age, Activity and Chemical Composition of the Open Clusters NGC 2451 A and B

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..219..980h&link_type=abstract

Stars as suns : activity, evolution and planets, Proceedings of the 219th symposium of the International Astronomical Union held

Astronomy and Astrophysics

Astronomy

Scientific paper

We have conducted a detailed study of the open clusters NGC 2451 A and B which are located along the same line of sight at 206pc and 370pc distance respectively. Although belonging to the nearest clusters they have not been much investigated until present due to strong contamination by field stars. ROSAT X-ray observations and optical UBVR photometry are used to identify cluster members by means of X-ray emission and colour-magnitude diagrams. For the first time the range of known probable cluster members has been extended to main sequence stars of spectral class M. Isochrone fitting yields an age of 50 to 80 Myrs for NGC 2451 A and about 50 Myrs for NGC 2451 B consistent with the X-ray luminosity distribution functions. Except from the occurence of four flares the stars of both clusters do not show strong long-term X-ray variability exceeding a factor 5 over a time span of 1 to 3 years. High-resolution spectra obtained with FEROS confirmed membershipof most of the X-ray selected cluster member candidates by means of radial velocity and allowed to obtain rotational velocities as well as metallicities and lithium abundances.

Affiliated with

Also associated with

No associations

Rating

New Results on Age, Activity and Chemical Composition of the Open Clusters NGC 2451 A and B 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 New Results on Age, Activity and Chemical Composition of the Open Clusters NGC 2451 A and B, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New Results on Age, Activity and Chemical Composition of the Open Clusters NGC 2451 A and B will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1546665