J/MNRAS/411/1013 CaII triplet in Sextans dSph galaxy (Battaglia+, 2011)
Study of the Sextans dwarf spheroidal galaxy from the DART Ca II triplet survey.
Battaglia G., Tolstoy E., Helmi A., Irwin M., Parisi P., Hill V.,
Jablonka P.
<Mon. Not. R. Astron. Soc., 411, 1013-1034 (2011)>
=2011MNRAS.411.1013B 2011MNRAS.411.1013B
ADC_Keywords: Galaxies, nearby ; Abundances, [Fe/H] ; Equivalent widths ;
Radial velocities
Keywords: stars: abundances - galaxies: dwarf -
galaxies: individual: Sextans dSph -
galaxies: kinematics and dynamics - Local Group - dark matter
Abstract:
We use Very Large Telescope (VLT)/Fibre Large Array Multi Element
Spectrograph (FLAMES) intermediate-resolution (R∼6500) spectra of
individual red giant branch stars in the near-infrared Ca ii triplet
(CaT) region to investigate the wide-area metallicity properties and
internal kinematics of the Sextans dwarf spheroidal galaxy (dSph). Our
final sample consists of 174 probable members of Sextans with accurate
line-of-sight velocities (±2km/s) and CaT [Fe/H] measurements
(±0.2dex).
Description:
The spectroscopic observations were carried out at VLT/FLAMES between
2003 and 2004, with the exception of one pointing which was
re-observed in 2008 May, during the commissioning of the upgraded
Grating Instrument for Radiation Analysis with a Fiber-FedEchelle
(GIRAFFE) spectrograph CCD.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 74 174 Relevant data for the stars in Sextans observed with
VLT/FLAMES that passed our membership criteria
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See also:
J/AJ/110/2166 : Variables in Sextans dSph galaxy (Mateo+ 1995)
J/AJ/126/2840 : BVI CCD photometry of Sextans dSph galaxy (Lee+, 2003)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [sext]
5 A1 --- --- [_]
6- 8 I3 --- Seq Sequential number (<[BTH2011] NNN> in Simbad)
10- 11 I2 h RAh Right ascension (J2000)
13- 14 I2 min RAm Right ascension (J2000)
16- 20 F5.2 s RAs Right ascension (J2000)
22 A1 --- DE- Declination sign (J2000)
23 I1 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 31 F4.1 arcsec DEs Declination (J2000)
33- 36 F4.1 --- S/N Signal-to-noise ratio
38- 43 F6.2 km/s HV Heliocentric velocity
45- 48 F4.2 km/s e_HV rms uncertainty on HV
50- 53 F4.2 0.1nm W(CaT) Summed CaT equivalent width (EW2 + EW3)
55- 58 F4.2 0.1nm e_W(CaT) rms uncertainty on W(CaT)
60- 64 F5.2 [Sun] [Fe/H] Metallicity (1)
66- 69 F4.2 [Sun] e_[Fe/H] Error on [Fe/H] (lower value)
71- 74 F4.2 [Sun] E_[Fe/H] Error on [Fe/H] (upper value)
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Note (1): derived adopting the calibration from Starkenburg et al.
(2010A&A...513A..34S 2010A&A...513A..34S).
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 10-Oct-2011