J/ApJ/663/960 Radial velocities of Leo I stars (Sohn+, 2007)
Exploring halo substructure with giant stars.
X. Extended dark matter or tidal disruption?:
the case for the Leo I dwarf spheroidal galaxy.
Sohn S.T., Majewski S.R., Munoz R.R., Kunkel W.E., Johnston K.V.,
Ostheimer J.C., Guhathakurta P., Patterson R.J., Siegel M.H., Cooper M.C.
<Astrophys. J., 663, 960-989 (2007)>
=2007ApJ...663..960S 2007ApJ...663..960S
ADC_Keywords: Galaxies, nearby ; Radial velocities ; Photometry
Keywords: galaxies: evolution - galaxies: halos - galaxies: individual (Leo I) -
galaxies: interactions - galaxies: photometry - galaxies: structure
Abstract:
We present a wide-field (4.5deg2) photometric and spectroscopic
survey of the Leo I dwarf spheroidal (dSph) galaxy to explore its
extended morphology and dynamics. To select Leo I red giant branch
star candidates we exploit M, T2, and DDO51 filter photometry; this
yields 100% pure Leo I stars among more than 100 M<21.5 Leo I giant
candidates having previous or new Keck spectroscopy.
Description:
The images used in this study were obtained with the Mayall 4m
Telescope at Kitt Peak National Observatory (KPNO) during the nights
of UT 1998 November 17 and 2002 May 2-5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 81 125 Observed Radial Velocities of Stars
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See also:
J/AJ/125/1352 : Ursa Minor dSph M,T2, DDO51 photometry (Palma+, 2003)
J/AJ/130/2677 : Stars in the Carina dSph galaxy field (Majewski+, 2005)
J/ApJ/649/201 : Velocities & Washington photometry in Carina dSph (Munoz+ 2006)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Slit Slit identification
8- 12 I5 --- [SMM2007] Source identification number
14 A1 --- n_[SMM2007] [f] 4" slit (1)
16- 17 I2 h RAh Hour of Right Ascension (J2000)
19- 20 I2 min RAm Minute of Right Ascension (J2000)
22- 26 F5.2 s RAs Second of Right Ascension (J2000)
28 A1 --- DE- Sign of the Declination (J2000)
29- 30 I2 deg DEd Degree of Declination (J2000)
32- 33 I2 arcmin DEm Arcminute of Declination (J2000)
35- 38 F4.1 arcsec DEs Arcsecond of Declination (J2000)
40- 44 F5.2 mag M0mag Extinction corrected M-band (Washington)
magnitude
46- 49 F4.2 mag M-T2 Reddening corrected (M-T2) color index
51- 55 F5.2 mag M-D51 Reddening corrected (M-D51) color index
57- 61 F5.1 km/s HRV Heliocentric radial velocity (2)
63- 68 F6.1 km/s Vgsr Galactocentric standard of rest
radial velocity (3)
70- 74 F5.1 km/s TOff Telluric offset (4)
76- 79 F4.2 --- CCP Cross-correlation peak
81 I1 --- Q Quality indicator (5)
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Note (1): f = Alignment stars observed with 4" wide slits. All other stars
were observed with 1" wide slits.
Note (2): Corrected for the Telluric offsets as described in text.
Note (3): We convert to Galactocentric standard of rest by assuming a local
standard of rest velocity of 220km/s and a solar peculiar velocity of
(u,v,w)=(-9,12,7)km/s
Note (4): The wavelength ranges on which the telluric offset determination
is based are 6866-6912Å (the Fraunhofer B band), 7167-7320Å,
7593-7690Å (the Fraunhofer A band), 8110-8320Å, and
8925-9120Å, but all telluric features weaker than 20% were not
used. See text for more explanations.
Note (5): See Majewski et al. (2004AJ....128..245M 2004AJ....128..245M) and Kunkel et al.
(1997A&AS..122..463K 1997A&AS..122..463K) for descriptions on how Q-values are assigned.
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History:
From electronic version of the journal
References:
Majewski et al., Paper I 2000AJ....120.2550M 2000AJ....120.2550M
Majewski et al., Paper II 2000AJ....119..760M 2000AJ....119..760M
Kundu et al., Paper III 2002ApJ...576L.125K 2002ApJ...576L.125K
Palma et al., Paper IV 2003AJ....125.1352P 2003AJ....125.1352P, Cat. J/AJ/125/1352
Crane et al. 2003ApJ...594L.119C 2003ApJ...594L.119C
Rocha-Pinto et al. 2004ApJ...615..732R 2004ApJ...615..732R
Majewski et al., Paper VI 2005AJ....130.2677M 2005AJ....130.2677M, Cat. J/AJ/130/2677
Munoz et al. 2005ApJ...631L.137M 2005ApJ...631L.137M
Westfall et al., Paper VIII 2006AJ....131..375W 2006AJ....131..375W
Munoz et al. 2006ApJ...650L..51M 2006ApJ...650L..51M
Sohn et al., Paper X 2007ApJ...663..960S 2007ApJ...663..960S, Cat. J/ApJ/663/960
Munoz et al., Paper XI 2006ApJ...649..201M 2006ApJ...649..201M, Cat. J/ApJ/649/201
Majewski et al. 2012ApJ...747L..37M 2012ApJ...747L..37M
Sheffield et al., Paper XIV 2014ApJ...793...62S 2014ApJ...793...62S, Cat. J/ApJ/793/62
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 15-Aug-2009