J/AJ/130/1502 NGC 5846 group: photometry and spectroscopy (Mahdavi+, 2005)
The NGC 5846 group: dynamics and the luminosity function to mR=-12.
Mahdavi A., Trentham N., Tully R.B.
<Astron. J., 130, 1502-1515 (2005)>
=2005AJ....130.1502M 2005AJ....130.1502M
ADC_Keywords: Clusters, galaxy ; Magnitudes ; Redshifts
Keywords: clusters: individual (NGC 5846) - galaxies: dwarf - galaxies: halos -
galaxies: kinematics and dynamics -
galaxies: luminosity function, mass function - X-rays: galaxies
Abstract:
We conduct a photometric and spectroscopic survey of a 10°2
region surrounding the nearby NGC 5846 group of galaxies, using the
Canada-France-Hawaii and Keck I telescopes to study the population of
dwarf galaxies as faint as MR=-10. Candidates are identified on the
basis of quantitative surface brightness and qualitative morphological
criteria. Spectroscopic follow up and a spatial correlation analysis
provide the basis for affirming group memberships. Altogether, 324
candidates are identified, and 83 have spectroscopic membership
confirmation.
Description:
Observations of the NGC 5846 Group were made with the CFHT 12K CCD
camera in queue mode during 11 nights between 2002 March 16 and June
10.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 98 324 Photometric and spectroscopic data
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See also:
J/ApJ/607/202 : Redshift survey of nearby galaxy groups (Mahdavi+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- [MTT2005] Galaxy Identification
11 I1 --- Memb Original membership probability (1)
13- 14 I2 h RAh Hour of Right Ascension (J2000)
16- 17 I2 min RAm Minute of Right Ascension (J2000)
19- 22 F4.1 s RAs Second of Right Ascension (J2000)
24 A1 --- DE- Sign of the Declination (J2000)
25- 26 I2 deg DEd Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 32 I2 arcsec DEs Arcsecond of Declination (J2000)
34- 37 A4 --- MType Morphological type (2)
39- 43 F5.2 mag Rcmag Cousins R band isophotal magnitude to a
25.2mag/arcsec2
45- 49 F5.2 mag R300mag R band magnitude within 300pc (2.3")
51- 56 F6.2 mag RcMAG Absolute isophotal R band magnitude
58- 61 F4.2 mag AR Reddening in the R band
63- 66 F4.1 arcsec Reff Half-light radius
68- 72 F5.2 mag/arcsec2 SuBrR R band surface brightness
74- 77 I4 km/s cz ? Heliocentric velocity
79- 98 A20 --- Notes Other galaxy identifications (3)
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Note (1): Assigned to the galaxy purely from photometry and morphology.
0 = non-SDSS spectroscopic redshift;
1 = probable member;
2 = possible member;
3 = conceivable member;
4 = likely not a member;
5 = Excluded from original sample by the TT02 surface brightness criteria.
Note (2): Morphological type, defined as follows:
dI = dwarf irregular;
dE = dwarf elliptical;
N = nucleated dwarf;
E = elliptical;
S = spiral;
VLSB = very low surface brightness galaxy.
Note (3): ZM indicates data from Zabludoff & Mulchaey (1998,
Cat. J/ApJ/496/39). All redshifts are from the NASA Extragalactic
Database, unless the date of a Keck observation is indicated, in which
case they are new. Galaxies marked with "sat" were saturated in our
imaging; for these galaxies, all values were derived from SDSS public
data, with appropriate conversions from the SDSS r to Cousins R
photometric bands.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 20-Dec-2005