J/AJ/131/2114 Radial velocities in Fornax dSph (Walker+, 2006)
Internal kinematics of the Fornax dwarf spheroidal galaxy.
Walker M.G., Mateo M., Olszewski E.W., Bernstein R., Wang X., Woodroofe M.
<Astron. J., 131, 2114-2139 (2006)>
=2006AJ....131.2114W 2006AJ....131.2114W
ADC_Keywords: Galaxies, nearby ; Radial velocities
Keywords: galaxies: dwarf - galaxies: individual (Fornax) -
galaxies: kinematics and dynamics - Local Group -
methods: statistical - techniques: radial velocities
Abstract:
We present new radial velocity results for 176 stars in the Fornax
dwarf spheroidal galaxy, of which at least 156 are probable Fornax
members. We combine with previously published data to obtain a radial
velocity sample with 206 stars, of which at least 176 are probable
Fornax members.
Description:
In order to identify spectroscopic target stars, we first obtained
photometric data from 31 fields. These observations took place the
nights of 1993 November 30, December 1, and December 10, during
photometric conditions. The data consist of 600-700s exposures in both
V and I filters at the Las Campanas Observatory 40inch (1.02m)
telescope. We obtained spectra of the selected red giants over four
observing runs occurring 1992 November 28-December 7, 1993 December
12-20, 1994 October 22-28, and 2002 December 12-15. The 1992-1994
spectra were taken at the Las Campanas Observatory 2.5m du Pont
Telescope. The 2002 spectra were acquired at the Magellan 6.5m Clay
Telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 94 233 Heliocentric radial velocity results for Fornax
target stars
table2.dat 91 109 Results for radial velocity of standard stars
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See also:
J/AJ/119/2866 : Proper motions of metal-poor stars (Beers+, 2000)
J/A+A/459/423 : VI and [Fe/H] of Fornax dSph RGB stars (Battaglia+, 2006)
J/AJ/127/840 : VRI photometry of Fornax red giants (Pont+, 2004)
J/AJ/131/912 : BR photometry of Fornax dSph center (Olszewski+, 2006)
J/PASP/110/533 : BR photometry of Fornax bright stars (Stetson+ 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star identification
12- 13 I2 h RAh Hour of Right Ascension (J2000.0)
15- 16 I2 min RAm Minute of Right Ascension (J2000.0)
18- 21 F4.1 s RAs Second of Right Ascension (J2000.0)
23 A1 --- DE- Sign of the Declination (J2000.0)
24- 25 I2 deg DEd Degree of Declination (J2000.0)
27- 28 I2 arcmin DEm Arcminute of Declination (J2000.0)
30- 33 F4.1 arcsec DEs Arcsecond of Declination (J2000.0)
35- 43 F9.1 d HJD Heliocentric Julian Date
45- 55 A11 "DD/MM/YYYY" ObsDate UT day of observation
57- 60 F4.1 arcmin Rad Angular distance (1)
62- 66 F5.1 deg PA Position angle
68- 72 F5.2 mag Imag ? The I band magnitude
74- 78 F5.2 mag V-I ? The (V-I) color index
80- 84 F5.1 km/s HRV Heliocentric radial velocity
86- 88 F3.1 km/s e_HRV Uncertainty in HRV
90 A1 --- Mem [YN?] Membership (2)
92- 94 A3 --- n_Mem [pv] Criteria used for Mem (3)
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Note (1): Between the center of Fornax, taken from Irwin & Hatzidimitriou
(1995MNRAS.277.1354I 1995MNRAS.277.1354I) to be 02:39:52.3 -34:28:09.0 (J2000.0),
and the projection of the radial position vector upon the plane
centered on these coordinates.
Note (2): Based on photometric and velocity criteria:
Y = probable member of Fornax;
N = nonmember of Fornax;
? = borderline case for membership.
Note (3): Flag on Mem, defined as follows:
p = due to star's photometry;
v = due to star's velocity.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Star identification
14- 15 I2 h RAh ? Hour of Right Ascension (J2000.0)
17- 18 I2 min RAm ? Minute of Right Ascension (J2000.0)
20- 23 F4.1 s RAs ? Second of Right Ascension (J2000.0)
25 A1 --- DE- Sign of the Declination (J2000.0)
26- 27 I2 deg DEd ? Degree of Declination (J2000.0)
29- 30 I2 arcmin DEm ? Arcminute of Declination (J2000.0)
32- 35 F4.1 arcsec DEs ? Arcsecond of Declination (J2000.0)
37- 42 F6.1 km/s RVPub ? Published radial velocity
44- 46 F3.1 km/s e_RVPub ? Uncertainty in RVPub
48 I1 --- r_RVPub ? Reference for RVPub (1)
50- 58 F9.1 d HJD Heliocentric Julian Date
60- 70 A11 "DD/MM/YYYY" ObsDate UT Day of observation
72- 76 F5.1 km/s HRV Measured radial velocity
78- 80 F3.1 km/s e_HRV Uncertainty in HRV
82- 87 F6.1 km/s Weighted mean radial velocity from the
results presented in this table
89- 91 F3.1 km/s e_ Uncertainty in
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Note (1): Reference for RVPub, defined as follows:
3 = CORAVEL study (Udry et al. 1999ASPC..185..383U 1999ASPC..185..383U);
4 = Olszewski et al. (1991AJ....101..515O 1991AJ....101..515O);
5 = Beers et al. (2000, Cat. J/AJ/119/2866);
6 = Evans (1967IAUS...30...57E 1967IAUS...30...57E).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 23-May-2007