2005A&A...436..677F


Query : 2005A&A...436..677F

2005A&A...436..677F - Astronomy and Astrophysics, volume 436, 677-686 (2005/6-3)

Detection of red line asymmetries in LHS 2034.

FUHRMEISTER B., SCHMITT J.H.M.M. and HAUSCHILDT P.H.

Abstract (from CDS):

We report very pronounced line asymmetries during a long duration flare on the dM6 star LHS 2034 (AZ Cnc). While all lines of the Balmer series and all strong Hei lines show these asymmetries, the metal lines do not. This can be explained with the help of PHOENIX model chromospheres considering the formation depth of the lines involved. Moreover, the asymmetries persist over about one hour changing shape and amplitude. Fitting the asymmetries with an additional broad Gaussian component leads us to the scenario of a series of downward propagating condensations that decelerate due to the higher density of the lower chromosphere. In addition, similar but weaker line asymmetries were found in LHS 2397a.

Abstract Copyright:

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

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* CF Tuc RS* 00 53 07.7675726832 -74 39 05.608753668   8.31 7.90   6.730 G2/5V+F0 225 0
2 * bet Per EB* 03 08 10.1324535 +40 57 20.328013 1.70 2.07 2.12 2.08 2.11 B8V 1190 1
3 V* V1321 Ori Or* 05 35 04.3009445808 -05 08 12.737523192   11.94 10.538   9.117 K0III 99 0
4 V* YZ CMi Er* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 848 0
5 V* AZ Cnc Er* 08 40 29.6791626163 +18 24 08.726250637   19.2 17.59 16.6 13.45 M6.0V 80 0
6 G 9-38 ** 08 58 15.061776 +19 45 46.96020   15.58   13.40   M7V+M7V 101 0
7 G 9-38A PM* 08 58 15.0749311179 +19 45 48.258121374     13.93     M8Ve 89 0
8 V* LQ Hya BY* 09 32 25.5683895648 -11 11 04.692242760 9.316 8.761 7.891 7.288 6.815 K1Vp 439 0
9 BD+20 2465 Er* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1262 0
10 Wolf 359 Er* 10 56 28.9208702274 +07 00 53.003285286 16.706 15.541 13.507 11.684 9.507 dM6 688 0
11 LP 732-94 LM* 11 21 49.1708652037 -13 13 08.693807585     19.57     M8.5V 126 0
12 V* GL Vir Er* 12 18 59.3997287457 +11 07 33.773236317   15.68 13.90 13.55   M4.5Ve 160 0
13 V* AT Mic Er* 20 41 51.15925 -32 26 06.8283 12.753 11.909 10.343 9.098 7.383 M4.5Ve+M4.5Ve 350 0
14 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1056 0

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2023.02.01-19:24:42

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