J/ApJ/649/201 Velocities and Washington photometry in Carina dSph (Munoz+, 2006)
Exploring halo substructure with giant stars.
XI. The tidal tails of the Carina dwarf spheroidal galaxy and the discovery of
Magellanic cloud stars in the Carina foreground.
Munoz R.R., Majewski S.R., Zaggia S., Kunkel W.E., Frinchaboy P.M.,
Nidever D.L., Crnojevic D., Patterson R.J., Crane J.D., Johnston K.V.,
Sohn S.T., Bernstein R., Shectman S.
<Astrophys. J., 649, 201-223 (2006)>
=2006ApJ...649..201M 2006ApJ...649..201M
ADC_Keywords: Galaxies, nearby ; Photometry, CMT1T2V ; Radial velocities
Keywords: dark matter - galaxies: kinematics and dynamics - Local Group -
Magellanic Clouds
Abstract:
A new large-area Washington M, T2+DDO51 filter survey of more than
10deg2 around the Carina dSph galaxy reveals a spectroscopically
confirmed power-law radial density break population of Carina giant
stars extending several degrees beyond the central King profile.
Magellan telescope MIKE spectroscopy establishes the existence of
Carina stars to at least 4.5 times its central King limiting radius,
rlim, and primarily along Carina's major axis. To keep these stars
bound to the dSph would require a global Carina mass-to-light ratio of
M/L≥6300(M/L)_☉. The MIKE velocities, supplemented with ∼950
additional Carina field velocities from archived VLT+GIRAFFE spectra
with r≲rlim, demonstrate a nearly constant Carina velocity dispersion
(sigmav) to just beyond r=rlim and both a rising and a velocity
shear at still larger radii. Together, the observational evidence
suggests that the discovered extended Carina population represents
tidal debris from the dSph.
Description:
Thus, new Carina photometry over a 10.74deg2 area centered on the
Carina dSph was obtained with the Mosaic wide-field imaging camera on
the Blanco telescope on UT 2000 February 2427 under photometric
conditions.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 87 77 Radial Velocities of Stars observed with MIKE
table2.dat 87 967 Radial Velocities of Stars observed with VLT/FLAMES
--------------------------------------------------------------------------------
See also:
J/AJ/114/1458 : The Carina Dwarf (Mighell 1997)
J/AJ/115/1856 : Dwarf Cepheids in Carina (Mateo+, 1998)
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/AJ/131/895 : Stars in the Carina dwarf spheroidal galaxy (Koch+, 2006)
J/ApJ/663/960 : Radial velocities of Leo I stars (Sohn+, 2007)
Byte-by-byte Description of file: table[12].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- [MOP2000] Star name (CNNNNNNN)
10 I1 h RAh Right ascension (J2000.0)
12- 13 I2 min RAm Right ascension (J2000.0)
15- 19 F5.2 s RAs Right ascension (J2000.0)
21 A1 --- DE- Declination sign (J2000.0)
22- 23 I2 deg DEd Declination (J2000.0)
25- 26 I2 arcmin DEm Declination (J2000.0)
28- 31 F4.1 arcsec DEs Declination (J2000.0)
33- 42 A10 "YYYY/MM/DD" Date UT date of observation (only in table1)
44- 48 F5.2 mag Mmag0 Derreddned Washington M magnitude (1)
50- 53 F4.2 mag (M-T2)0 Derreddned Washington M-T2 colour index (1)
55- 59 F5.2 mag (M-51)0 Derreddned Washington M-DDO51 colour
index (1)
61- 66 F6.1 km/s HRV Heliocentric velocity
68- 73 F6.1 km/s Vlsr Velocity in standard of rest (LSR)
75- 78 F4.1 km/s sigma rms uncertainty in the RV measurements
80- 83 A4 --- Cand? Candidate flag (2)
85- 87 A3 --- Mmb [Y/N RV?] Membership code (3)
--------------------------------------------------------------------------------
Note (1): Corrected for reddening based on the Galactic coordinates by
using the reddening map constructed by Schlegel et al.
(1998ApJ...500..525S 1998ApJ...500..525S). Filter characteristics are:
---------------------------
Filter Wavelength Width
---------------------------
M 508.5nm 110
T1 633.0nm 80
T2 788.5nm 140
DDO51 512.8 15.2
---------------------------
Note (2): Candidate flag as follows:
Y = photometric Carina giant candidate
N = not a photometric Carina giant candidate
2CD = A 2CD outlier but lies inside Paper I (2000AJ....120.2550M 2000AJ....120.2550M)
giant box and within the Carina RGB selection.
CMD2 = Lies just outside the RGB selection, but is a giant stars
according to the Paper I (2000AJ....120.2550M 2000AJ....120.2550M) selection criteria.
CMD1 = Lies just outside the RGB selection, but is a giant stars
according to the most conservative giant box used in this paper.
Note (3): Member code as follows:
Y = member
N = not a member
RV? = a radial velocity outlier, possibly a member (see Section 4.1.2)
but not included in the final sample
--------------------------------------------------------------------------------
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] 18-Jul-2008