2005A&A...439.1137F

Query : 2005A&A...439.1137F

2005A&A...439.1137F - Astronomy and Astrophysics, volume 439, 1137-1148 (2005/9-1)

PHOENIX model chromospheres of mid- to late-type M dwarfs.

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

Abstract (from CDS):

We present semi-empirical model chromospheres computed with the atmosphere code PHOENIX. The models are designed to fit the observed spectra of five mid- to late-type M dwarfs. Next to hydrogen lines from the Balmer series we used various metal lines, e.g. from FeI, for the comparison between data and models. Our computations show that an NLTE treatment of C,N,O impacts on the hydrogen line formation, while NLTE treatment of less abundant metals such as nickel influences the lines of the considered species itself. For our coolest models we investigated also the influence of dust on the chromospheres and found that dust increases the emission line flux. Moreover we present an (electronically published) emission line list for the spectral range of 3100 to 3900 and 4700 to 6800Å for a set of 21 M dwarfs and brown dwarfs. The line list includes the detection of the Nai D lines in emission for a L3 dwarf.

Abstract Copyright: ∼

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

VizieR on-line data: <Available at CDS (J/A+A/439/1137): stars.dat table1.dat>

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 G 272-61B Er* 01 39 01.6377185550 -17 57 01.001240728           M6V 855 0
2 HD 42581 Er* 06 10 34.6149358167 -21 51 52.656352926 10.801 9.607 8.125 7.164 6.121 M1V 477 0
3 V* YZ CMi Er* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 884 0
4 G 51-15 Er* 08 29 49.3527921926 +26 46 33.624143059   16.87   14.736   M6.5Ve 295 0
5 V* AZ Cnc Er* 08 40 29.6791626163 +18 24 08.726250637   19.2 17.59 16.6 13.45 M6.0V 85 0
6 LP 666-9 LM* 08 53 36.1604798120 -03 29 32.197505547     18.959 16.781 14.487 M9Ve 252 0
7 G 9-38 ** 08 58 15.061776 +19 45 46.96020   15.58   13.40   M7V+M7V 107 0
8 G 9-38A PM* 08 58 15.0749311179 +19 45 48.258121374     13.93     M8Ve 92 0
9 V* AD Leo Er* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1339 1
10 LP 731-58 Er* 10 48 12.6142508200 -11 20 09.610693470     15.784 16.01 11.25 M6.5V 174 0
11 DENIS J104814.6-395606 LM* 10 48 14.5736104113 -39 56 06.842743867     17.532 15.051 12.67 M8.5Ve: 129 0
12 Wolf 359 Er* 10 56 28.9208702274 +07 00 53.003285286 16.706 15.541 13.507 11.684 9.507 dM6 721 0
13 SIPS J1058-1548 BD* 10 58 47.8366017792 -15 48 17.250428304       20.095 17.764 L3V 100 2
14 LP 732-94 LM* 11 21 49.1708652037 -13 13 08.693807585     19.57     M8.5V 131 0
15 V* GL Vir Er* 12 18 59.3997287457 +11 07 33.773236317   15.68 13.90 13.55   M4.5Ve 168 0
16 Wolf 461 Er* 13 00 33.5221795982 +05 41 07.996620384   15.12   13.041   M4.5Ve 133 0
17 NAME Kelu-1 BD* 13 05 40.1642434199 -25 41 05.712165150         16.85 L2+L3.5 254 0
18 2MASS J13153094-2649513 BD* 13 15 30.8597827568 -26 49 51.829331165           L5e 45 1
19 NAME Proxima Centauri Er* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1298 0
20 LP 914-54 Er* 14 56 38.2634715567 -28 09 48.619153485     17.141 14.863 12.433 M7.0Ve 156 0
21 VB 8 LM* 16 55 35.2557374336 -08 23 40.753073075   18.7 16.916 14.566 12.24 M7Ve 430 0
22 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 356 0

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