J/MNRAS/403/2157 Main-sequence star chromospheres (Houdebine+, 2010)
Observation and modelling of main-sequence star chromospheres.
X. Radiative budgets on Gl 867A and AU Mic (dM1e), and a two-component model
chromosphere for Gl 205 (dM1).
Houdebine E.R.
<Mon. Not. R. Astron. Soc., 403, 2157-2166 (2010)>
=2010MNRAS.403.2157H 2010MNRAS.403.2157H
ADC_Keywords: Stars, late-type ; Magnetic fields ; Spectroscopy
Keywords: stars: chromospheres - stars: late-type - stars: magnetic fields
Abstract:
We report on high-resolution observations of two dM1 stars: Gl 867A,
an active dM1e star, and Gl 205, a less active dM1 star. The
wavelength coverage is from 3890 to 6820Å with a resolving power of
about 45000. The difference spectrum of these two stars allows us to
make a survey of spectral lines sensitive to magnetic activity.
Description:
The observations presented here were acquired using the 1.93-m
telescope at the Observatoire de Haute Provence, equipped with the
ELODIE spectrograph. ELODIE is a cross-dispersed echelle spectrograph
with an original optical design that yields evenly spaced orders.
Objects:
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RA (2000) DE Designation(s)
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22 38 45.6 -20 37 16 Gl 867A = HD 214479
05 31 27.4 -03 40 38 Gl 205 = HD 36395
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1a.dat 26 32 Total results for each Flux sets
table1.dat 63 602 List of the spectral lines sensitive to
chromospheric activity
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Byte-by-byte Description of file: table1a.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 0.1pm dEW ? Difference equivalent widths between
Gl867A and Gl 205
6- 9 F4.2 hW/m2 Flux Continuum flux from Allard et al.
(1997ARA&A..35..137A 1997ARA&A..35..137A) (in 105erg/cm2/s)
10 A1 --- --- [@]
11- 14 I4 0.1nm lam.F Flux wavelength (Å)
15 A1 --- --- [A]
17- 23 F7.2 10W/m2 dFlux Difference radiative losses in the lines (1)
25- 26 I2 --- No ?=- Order number of the corresponding
spectral order
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Note (1): The total difference radiative losses in the line is 1020.73x10W/m2.
(103erg/s/cm2 = 1W/m2)
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Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 0.1nm lambda0 ?=- Vacuum wavelength
9- 15 F7.2 0.1nm lambda ?=- Gl 205 wavelength
17- 20 I4 0.1pm dEW Difference equivalent widths between Gl867A
and Gl 205
22- 25 F4.2 hW/m2 Flux Continuum flux from Allard et al.
(1997ARA&A..35..137A 1997ARA&A..35..137A) (in 105erg/cm2/s)
26 A1 --- --- [@]
27- 30 I4 0.1nm lam.F Flux wavelength
31 A1 --- --- [A]
33- 38 F6.2 10W/m2 dFlux Difference radiative losses in the lines
40- 52 A13 --- Ident Line identification
54- 55 I2 --- No ?=- Order number of the corresponding
spectral order
57- 63 A7 --- Rem Original catalog from which we identified
each line
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 18-Oct-2010