J/A+A/675/A49 vlos of Sculptor dSph red giants (Tolstoy+, 2023)
A 3D view of dwarf galaxies with Gaia and VLT/FLAMES
I. The Sculptor dwarf spheroidal.
Tolstoy E., Skuladottir A., Battaglia G., Brown A.G.A., Massari D.,
Irwin M.J., Starkenburg E., Salvadori S., Hill V., Jablonka P., Salaris M.,
van Essen T., Olsthoorn C., Helmi A., Pritchard J.
<Astron. Astrophys. 675, A49 (2023)>
=2023A&A...675A..49T 2023A&A...675A..49T (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Stars, giant ; Radial velocities ;
Spectroscopy ; Optical
Keywords: galaxies: dwarf - galaxies: individual: Sculptor dwarf spheroidal -
stars: abundances - galaxies: evolution
Abstract:
We present a new homogeneous survey of VLT/FLAMES LR8 line-of-sight
radial velocities (vlos) for 1604 resolved red giant branch stars in
the Sculptor dwarf spheroidal galaxy. In addition, we provide reliable
Ca II triplet metallicities, [Fe/H], for 1339 of these stars. From
this combination of new observations with ESO archival data, we obtain
the largest and most complete sample of vlos and [Fe/H] measurements
for individual stars in any dwarf galaxy.
Description:
Ca II triplet metallicities from FLAMES/LR8 spectra and astrometry and
photometry from Gaia DR3 catalogue.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee1.dat 212 1701 All measurements for likely velocity members
tablee2.dat 106 530 Basic properties for spectroscopic non-members
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See also:
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
J/MNRAS/383/183 : CaII triplet of RGB from VLT/FLAMES obs. (Battaglia+, 2008)
Byte-by-byte Description of file: tablee1.dat
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Bytes Format Units Label Explanations
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1- 19 I19 -- GaiaDR3 Gaia DR3 Id number
21- 33 F13.10 deg RAdeg Gaia DR3 Right Ascension (J2000.0)
35- 48 F14.10 deg DEdeg Gaia DR3 Declination (J2000.0)
50- 56 F7.4 mag Gmag Gaia DR3 G magnitude
58- 64 F7.4 mag BPmag Gaia DR3 BP magnitude
66- 72 F7.4 mag RPmag Gaia DR3 RP magnitude
74- 80 E7.4 mas plx Gaia DR3 parallax
82- 87 F6.4 mas e_plx Gaia DR3 parallax error
89- 94 F6.3 mas/yr pmRA Gaia DR3 proper motion along
right ascension
96-100 F5.3 mas/yr e_pmRA Gaia DR3 error on pmRA
102-108 F7.3 mas/yr pmDE Gaia DR3 proper motion along declination
110-114 F5.3 mas/yr e_pmDE Gaia DR3 error on pmDE
116-121 F6.4 deg ellr Elliptical radius
123-136 A14 --- Flamesfield Name of FLAMES pointing
138-147 A10 --- SpecName Name of object within pointing
149-150 I2 --- Nspec Number of FLAMES spectra combined
152-157 F6.2 --- S/N Signal-to-noise spectra
(combined if N-spec>1)
159-164 F6.2 km/s Vlos Line of sight velocity
(combined if N-spec>1)
166-170 F5.3 km/s e_Vlos Error on vel (combined if N-spec>1)
172-177 F6.3 km/s s_Vlos Variance on vel (if N-spec>1)
179-183 F5.2 [-] [Fe/H] ?=- Ca II triplet [Fe/H]
(combined if N-spec>1)
185-189 F5.3 [-] e_[Fe/H] ?=- Error on [Fe/H] (combined if N-spec>1)
191-195 F5.3 [-] s_[Fe/H] ?=- Variance on [Fe/H] (if N-spec>1)
197-207 F11.3 --- z Gaia DR3 membership score, see sect. 3.1
209 A1 --- Mem [mbn] Membership (1)
211-212 I2 --- q_[Fe/H] ?=- Reliablity of the [Fe/H]
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Note (1): Membership as follows:
m = member
b = borderline
n = non-member
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Byte-by-byte Description of file: tablee2.dat
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Bytes Format Units Label Explanations
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3- 21 I19 --- GaiaDR3 Gaia DR3 Id number
25- 35 F11.8 deg RAdeg Gaia DR3 Right Ascension (J2000.0)
39- 50 F12.8 deg DEdeg Gaia DR3 Declination (J2000.0)
54- 65 A12 --- Flamesfield Name of FLAMES pointing
69- 79 A11 --- SpecName Name of object within pointing
81- 86 F6.2 mag Vmag V magnitude calculated from Gaia photometry
90- 96 F7.3 --- S/N Signal-to-noise
100-106 F7.2 km/s Vlos Line of sight velocity
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Acknowledgements:
Eline Tolstoy, etolstoy(at)astro.rug.nl
(End) Patricia Vannier [CDS] 25-Apr-2023