J/AJ/137/4956 Globular clusters around NGC 1407 (Romanowsky+, 2009)
Mapping the dark side with DEIMOS: globular clusters, X-ray gas, and dark matter
in the NGC 1407 group.
Romanowsky A.J., Strader J., Spitler L.R., Johnson R., Brodie J.P.,
Forbes D.A., Ponman T.
<Astron. J., 137, 4956-4987 (2009)>
=2009AJ....137.4956R 2009AJ....137.4956R
ADC_Keywords: Galaxies, nearby ; Clusters, globular ; Photometry, SDSS
Keywords: dark matter - galaxies: clusters: general -
galaxies: elliptical and lenticular, cD -
galaxies: kinematics and dynamics - globular clusters: general -
X-rays: galaxies
Abstract:
NGC 1407 is the central elliptical in a nearby evolved group of
galaxies apparently destined to become a galaxy cluster core. We use
the kinematics of globular clusters (GCs) to probe the dynamics and
mass profile of the group's center, out to a radius of 60kpc (∼10
galaxy effective radii)-the most extended data set to date around an
early-type galaxy. This sample consists of 172 GC line-of-sight
velocities, most of them newly obtained using Keck/DEIMOS, with a few
additional objects identified as dwarf-globular transition objects or
as intragroup GCs.
Description:
The DEIMOS observations were carried out as part of Keck program
2006B_U024D (PI: J.P. Brodie). Candidate GCs were selected from
Subaru/Suprime-Cam images of NGC 1407 taken in g'r'i' bands in very
good seeing conditions (0.5"-0.6"). Spectroscopic observations
were made with Keck-2/DEIMOS on 2006 November 19-21.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 190 Photometry and spectroscopy of globular cluster
candidates around NGC 1407
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See also:
J/MNRAS/366/1230 : BI photometry of NGC 1407 and NGC 1400 GCs (Forbes+, 2006)
J/MNRAS/369/1375 : Dwarf galaxies in NGC 1407 Group (Trentham+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID Suprime-Cam identification number,
[RSS2009] NNNNNN in Simbad
8- 9 I2 --- LRIS ? Corresponding LRIS identification (1)
11- 12 I2 h RAh Hour of Right Ascension (J2000) (2)
14- 15 I2 min RAm Minute of Right Ascension (J2000) (2)
17- 22 F6.3 s RAs Second of Right Ascension (J2000) (2)
24 A1 --- DE- Sign of the Declination (J2000)(2)
25- 26 I2 deg DEd Degree of Declination (J2000) (2)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000) (2)
31- 35 F5.2 arcsec DEs Arcsecond of Declination (J2000) (2)
37- 41 F5.1 arcsec Rp Projected distance from NGC 1407
43- 47 F5.1 deg PA Position angle on the sky (North through East)
49- 53 F5.2 mag imag i'0 band corrected magnitude (4)
55- 58 F4.2 mag g-i (g'-i')0 corrected color (4)
60- 63 F4.2 mag r-i (r'-i')0 corrected color (4)
65- 68 I4 km/s Velp ? Heliocentric line-of-sight velocity
70- 74 F5.3 --- z ? Redshift (for galaxy sources only)
75 A1 --- u_z [?] Indicates uncertain z
77- 78 I2 km/s e_Velp ? Error in Velp
80- 87 A8 --- Type Source type (6)
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Note (1): From Cenarro et al., 2007AJ....134..391C 2007AJ....134..391C, <[CBS2007] NN> in Simbad.
Note (2): The center of the galaxy NGC 1407 is at 03:40:11.808 -18:34:47.92
(J2000), and the systemic velocity is 1784km/s.
Note (4): The photometric values have been corrected for Galactic
extinction (Schlegel et al., 1998ApJ...500..525S 1998ApJ...500..525S).
Note (6): Ojects with "?" have uncertain identifications, and objects in
(parentheses) have marginal signal-to-noise. Type codes are:
star = star
GC = globular cluster
IGC = intra-group globular cluster
DGTO = dwarf-globular transition object
gal = background galaxy
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 07-Nov-2011