2004A&A...415..265H

Query : 2004A&A...415..265H

2004A&A...415..265H - Astronomy and Astrophysics, volume 415265-272 (2004/2-3)

A new strongly X-ray flaring M9 dwarf in the solar neighborhood.

HAMBARYAN V., STAUDE A., SCHWOPE A.D., SCHOLZ R.-D., KIMESWENGER S. and NEUHAEUSER R.

Abstract (from CDS):

We report on the discovery of a very low mass (VLM) star in the solar neighborhood, originally identified as an optical counterpart of a flaring X-ray source detected in the ROSAT All-Sky survey. Optical spectroscopy and infrared photometry consistently reveal a spectral type of M9±0.5 and a distance of ≃11±2 pc. The optical counterpart of 1RXS J115928.5-524717 shows a large proper motion of 1.08±0.06''/year. 1RXS J115928.5-524717 is the fourth object among the VLM stars displaying a huge X-ray flare, reaching the unprecedent value of LX/Lbol≃0.1.

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Journal keyword(s): methods: data analysis - X-rays: stars - stars: low-mass, brown dwarfs - stars: distances - stars: flare - stars: individual: 1RXS J115928.5-524717

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* DY Psc BY* 00 24 24.6317407560 -01 58 19.954412004     19.42 17.301 15.022 M9.5V 220 1
2 PC 0025+0447 BD* 00 27 41.9817343344 +05 03 41.691766608           L1.0 75 0
3 CTI 012657.5+280202 LM* 01 27 39.1474134816 +28 05 53.372286456           M8.5V 25 0
4 2MASS J01443536-0716142 BD* 01 44 35.4064614144 -07 16 14.318758700           L6.5 63 0
5 2MASSW J0149090+295613 BD* 01 49 09.0028348631 +29 56 12.511555579           M9.5V 62 0
6 LP 944-20 LM* 03 39 35.2523500210 -35 25 43.641996333     18.69 16.39 13.288 M9.5Ve 308 0
7 LP 666-9 BD* 08 53 36.1604798120 -03 29 32.197505547     18.959 16.781 14.487 M9Ve 274 1
8 DENIS J104814.6-395606 LM* 10 48 14.5736104113 -39 56 06.842743867     17.532 15.051 12.67 M8.5Ve: 141 0
9 1RXS J115928.5-524717 LM* 11 59 27.3612549098 -52 47 18.911319812       16.617 14.49 M9Ve 34 0
10 BR B1222-1221 LM* 12 24 52.1861111523 -12 38 35.704886187           M8e 56 0
11 LP 271-25 LM* 14 28 43.2275214164 +33 10 39.259309081   21.2   17.8   M9Ve 262 0
12 TVLM 513-46 BD* 15 01 08.1864639648 +22 50 02.137869060   21.4 15.09 18.0   M8.5V 189 0
13 TVLM 868-110639 LM* 15 10 16.8245051187 -02 41 08.085982519     20.505 18.035 15.664 M9V 63 1
14 VB 8 LM* 16 55 35.2557374336 -08 23 40.753073075   18.7 16.916 14.566 12.24 M7Ve 457 0
15 VB 10 PM* 19 16 57.6109547886 +05 09 01.600923413     17.30     M8V 499 1
16 LAWD 94 WD* 23 54 01.0726392457 -33 16 31.078214643   14.6 13.56     DA5.7 63 0

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