Chromospheric and coronal activity of low-mass stars in the Pleiades

Details Chromospheric and coronal activity of low-mass stars in the Pleiades Chromospheric and coronal activity of low-mass stars in the Pleiades

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.274..869h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 274, Issue 3, pp. 869-883.

Astronomy and Astrophysics

Astronomy

35

Stars: Activity, Stars: Chromospheres, Stars: Coronae, Stars: Low-Mass, Brown Dwarfs, Open Clusters And Associations: Individual: Pleiades, X-Rays: Stars

Scientific paper

We present the results of a study of the chromospheric and coronal properties of a large sample of Pleiades low-mass stars. Hα observations have been obtained for 34 proper motion members of the cluster and are combined with previously published measurements. Additionally we have analysed X-ray data from three ROSAT PSPC pointings in the cluster. Both Hα and X-ray luminosities have been calculated and the ratios L_Hα/L_bol and L_X/L_bol have been used as indicators of chromospheric and coronal activity respectively. Using survival analysis techniques we form cumulative distribution functions (CDFs) for these activity indicators, and show that the means of the CDFs turn over at M_I~8-9 (M~0.4-0.3 M_solar), consistent with the point at which stars are expected to become fully convective. However, the detection of a number of very X-ray-active fully convective stars implies that at least some of these objects can support coronae that are as active as those observed in stars with radiative cores.

Affiliated with

Also associated with

No associations

Rating

Chromospheric and coronal activity of low-mass stars in the Pleiades 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 Chromospheric and coronal activity of low-mass stars in the Pleiades, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chromospheric and coronal activity of low-mass stars in the Pleiades will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-756100