J/A+A/511/A12 Low-luminosity galaxies in NGC 5846 group (Eigenthaler+, 2010)
Revisiting the low-luminosity galaxy population of the NGC 5846 group with SDSS.
Eigenthaler P., Zeilinger W.W.
<Astron. Astrophys., 511, A12-12 (2010)>
=2010A&A...511A..12E 2010A&A...511A..12E
ADC_Keywords: Clusters, galaxy ; Photometry, SDSS ; Redshifts
Keywords: galaxies: clusters: individual: NGC 5846 group - galaxies: dwarf -
galaxies: photometry - methods: data analysis
Abstract:
Low-luminosity galaxies are known to outnumber the bright galaxy
population in poor groups and clusters of galaxies. Yet, the
investigation of low-luminosity galaxy populations outside the Local
Group remains rare and the dependence on different group environments
is still poorly understood. Previous investigations have uncovered the
photometric scaling relations of early-type dwarfs and a strong
dependence of morphology with environment.
The present study aims to analyse the photometric and spectroscopic
properties of the low-luminosity galaxy population in the nearby,
well-evolved and early-type dominated NGC 5846 group of galaxies. It
is the third most massive aggregate of early-type galaxies after the
Virgo and Fornax clusters in the local universe. Photometric scaling
relations and the distribution of morphological types as well as the
characteristics of emission-line galaxies are investigated.
Description:
Spectroscopically selected low-luminosity group members from the Sloan
Digital Sky Survey with cz<3000km/s within a radius of 2°=0.91Mpc
around NGC 5846 are analysed. Surface brightness profiles of
early-type galaxies are fit by a Sersic model ∝r1/n. Star
formation rates, oxygen abundances, and emission characteristics are
determined for emission-line galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 82 74 Galaxies within 2° around NGC 5846 as
studied in this work
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See also:
II/294 : SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/AJ/130/1502 : NGC 5846 group: photometry and spectroscopy (Mahdavi+, 2005)
http://www.sdss.org : SDSS HomePage
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Galaxy Galaxy name (1)
12 A1 --- n_Galaxy [d] Individual note (2)
14- 16 I3 --- M05 ? Galaxy identification from Mahdavi et al.
(2005, Cat. J/AJ/130/1502),
<[MTT2005] N5846-NNN> in Simbad
18- 19 I2 h RAh Right ascension (J2000) (3)
21- 22 I2 min RAm Right ascension (J2000) (3)
24- 28 F5.2 s RAs Right ascension (J2000) (3)
30 A1 --- DE- Declination sign (J2000) (3)
31- 32 I2 deg DEd Declination (J2000) (3)
34- 35 I2 arcmin DEm Declination (J2000) (3)
37- 40 F4.1 arcsec DEs Declination (J2000) (3)
42- 46 F5.1 arcmin Dist Projected radial distance to NGC 5846
48- 51 I4 km/s cz Heliocentric cz velocity
53- 55 I3 km/s e_cz rms uncertainty on cz
57- 61 F5.2 mag i'mag SDSS i' magnitude (3)
63- 67 F5.2 mag r'-i' SDSS r'-i' colour index (3)
69- 74 F6.2 mag BMAG Absolute B magnitude
76- 82 A7 --- Type Morphological type
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Note (1): Galaxies with N5846_NN name are identified as
<[EZ2010] N5846 NN> in Simbad.
Note (2): N5846_41/42 are two HII regions classified as individual galaxies
in SDSS (see Sect. 3.2).
Note (3): Coordinates and magnitudes taken from SDSS DR4.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Feb-2011