2004A&A...420.1079F


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.03CET04:31:23

2004A&A...420.1079F - Astronomy and Astrophysics, volume 420, 1079-1085 (2004/6-4)

Detection and high-resolution spectroscopy of a huge flare on the old M9 dwarf DENIS 104814.7-395606.1.

FUHRMEISTER B. and SCHMITT J.H.M.M.

Abstract (from CDS):

We report a flare on the M9 dwarf DENIS 104814.7-395606.1, whose mass places it directly at the hydrogen burning limit. The event was observed in a spectral sequence during 1.3h. Line shifts to bluer wavelengths were detected in Hα, Hβ, and in the NaI D lines, indicating mass motions. In addition we detect a flux enhancement on the blue side of the two Balmer lines in the last spectrum of our series. We interpret this as rising gas cloud with a projected velocity of about 100km/s which may lead to mass ejection. The higher Balmer lines Hγ to H8 are not seen due to our instrumental setup, but in the last spectrum there is strong evidence for H9 being in emission.

Abstract Copyright:

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

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASSW J0149090+295613 LM* 01 49 09.0007790598 +29 56 12.534059099           M9.5V 52 0
2 LP 944-20 LM* 03 39 35.2525168530 -35 25 43.628465433     18.69 16.39 13.288 M9.5Ve 266 0
3 HD 49798 HXB 06 48 04.7000758397 -44 18 58.432035331 6.758 8.017 8.287 8.391 8.543 sdO6 288 0
4 BD+20 2465 Er* 10 19 36.2808024653 +19 52 12.014037746   10.82 9.52 9.19   dM3 1175 0
5 DENIS J104814.6-395606 LM* 10 48 14.5734267094 -39 56 06.843210566     17.532 15.051 12.67 M8.5Ve: 115 0

    Equat.    Gal    SGal    Ecl

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2021.03.03-04:31:23

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