Einstein X-ray survey of the Pleiades - The dependence of X-ray emission on stellar age
1985; IOP Publishing; Volume: 292; Linguagem: Inglês
10.1086/163143
ISSN1538-4357
AutoresG. Micela, S. Sciortino, S. Serio, G. S. Vaiana, Jay A. Bookbinder, L. Golub, Jr. Harnden F. R., R. Rosner,
Tópico(s)Astrophysical Phenomena and Observations
Resumoview Abstract Citations (99) References (41) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Einstein X-ray survey of the Pleiades : the dependence of X-ray emission on stellar age. Micela, G. ; Sciortino, S. ; Serio, S. ; Vaiana, G. S. ; Bookbinder, J. ; Golub, L. ; Harnden, F. R., Jr. ; Rosner, R. Abstract The data obtained with two pointed observations of 1 deg by 1 deg fields of the Pleiades region have been analyzed, and the results are presented. The maximum-likelihood X-ray luminosity functions for the Pleiades G and K stars in the cluster are derived, and it is shown that, for the G stars, the Pleiades X-ray luminosity function is significantly brighter than the corresponding function for Hyades G dwarf stars. This finding indicates a dependence of X-ray luminosity on stellar age, which is confirmed by comparison of the same data with median X-ray luminosities of pre-main sequence and local disk population dwarf G stars. It is suggested that the significantly larger number of bright X-ray sources associated with G stars than with K stars, the lack of detection of M stars, and the relatively rapid rotation of the Pleiades K stars can be explained in terms of the onset of internal differential rotation near the convective envelope-radidative core interface after the spin-up phase during evolution to the main sequence. Publication: The Astrophysical Journal Pub Date: May 1985 DOI: 10.1086/163143 Bibcode: 1985ApJ...292..172M Keywords: Pleiades Cluster; Spaceborne Astronomy; Star Clusters; X Ray Sources; Astronomical Catalogs; Dwarf Stars; G Stars; Heao 2; K Stars; Stellar Luminosity; Stellar Rotation; Astrophysics full text sources ADS | data products SIMBAD (80) Related Materials (4) Part 2: 1988ApJ...325..798M Part 3: 1990ApJ...348..557M Part 4: 1990ApJ...351..492S Part 5: 1994ASPC...64..110M
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