2002A&A...382L...9S


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.27CEST11:18:46

2002A&A...382L...9S - Astronomy and Astrophysics, volume 382, L9-12 (2002/2-2)

X-ray emission from the ultracool dwarf LHS 2065.

SCHMITT J.H.M.M. and LIEFKE C.

Abstract (from CDS):

We report the results of a 68 ks long X-ray observation of the M9V ultracool dwarf star LHS 2065 with the ROSAT high resolution imager (HRI). During the observations a major X-ray flare occurred with a peak X-ray luminosity of 4x1027erg/s and a total soft energy release of 2x1031erg. In addition, another flare with smaller peak X-ray luminosity and energy release occurred. The X-ray observations were carried out half a year apart. In the first half of the observations no significant X-ray emission from LHS 2065 could be detected, while in the second half in addition to flares also quiescent X-ray emission at a level of 2.3x1026erg/s was seen. LHS 2065 belongs to the coolest hydrogen burning stars known. The ROSAT observations show that coronal emission may be quite common even among such very late-type stars.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: coronae - stars: late type - stars: flare - X-rays: stars

Status at CDS:  

Simbad objects: 8

goto Full paper

goto View the reference in ADS

Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* DY Psc BY* 00 24 24.6343271916 -01 58 19.968960103     19.42 17.301 15.022 M9.5V 189 1
2 PC 0025+0447 LM* 00 27 41.97336 +05 03 41.7600           M9.5e 73 0
3 2MASSW J0149090+295613 LM* 01 49 09.0007790598 +29 56 12.534059099           M9.5V 52 0
4 LP 944-20 LM* 03 39 35.2525168530 -35 25 43.628465433     18.69 16.39 13.288 M9.5Ve 263 0
5 LP 666-9 LM* 08 53 36.1607609203 -03 29 32.201339067     18.959 16.781 14.487 M9Ve 222 0
6 LP 271-25 LM* 14 28 43.2272685950 +33 10 39.245755294   21.2   17.8   M9Ve 233 0
7 VB 8 Fl* 16 55 35.2561420232 -08 23 40.752903617   18.7 16.916 14.566 12.24 M7Ve 380 0
8 VB 10 Er* 19 16 57.6103282334 +05 09 01.588675251     17.30     M8V 433 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2002A&A...382L...9S and select 'bookmark this link' or equivalent in the popup menu


2020.05.27-11:18:46

© Université de Strasbourg/CNRS

    • Contact