SIMBAD references

2002A&A...391.1025M - Astronomy and Astrophysics, volume 391, 1025-1032 (2002/9-1)

X-ray emission near the substellar limit: The σ Orionis and Taurus star forming regions.


Abstract (from CDS):

We have carried out an extensive search for X-ray emission from young, very low-mass objects near and beyond the substellar limit, making use of archived ROSAT PSPC and HRI observations pointed at Brown Dwarfs and Brown Dwarf candidates in the young σ Orionis and Taurus-Auriga associations. In σ Ori we identify three Brown Dwarf candidates with X-ray sources; in Taurus-Auriga we add one further X-ray detection of a Brown Dwarf to the list published earlier. We combine this data with all previously X-ray detected Brown Dwarfs and Brown Dwarf candidates in young stellar associations and star forming regions to perform a study of stellar activity parameters on the as yet largest sample of young, very low mass objects. A similar relation between X-ray and bolometric luminosity, and Hα emission, respectively, as is known for T Tauri stars seems to hold for young objects down to the substellar limit, too. No signs for a change in X-ray activity are found on the transition to substellar masses.

Abstract Copyright:

Journal keyword(s): X-rays: stars - stars: formation, low-mass, brown dwarfs, coronae, activity

CDS comments: LH 0429+17 = EQ 0429+1723. In table 2 CFHT-BD-Tau 4 = [MDM2001] CFHT-BD-Tau 4, StromAnon 13 = [SS94] V410 Anon 13 and Kim 3-89 = [SS94] V410 X-ray 6. In reflist, Lee, 1968 : AJ is a misprint for ApJ (1968ApJ.152.913L).

Simbad objects: 38

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