VII/257 2MASS-selected Isolated Galaxies (2MIG) (Karachentseva+, 2010)
The Catalog of Isolated Galaxies selected from 2MASS.
Karachentseva V.E., Mitronova S.N., Melnyk O.V., Karachentsev I.D.
<Astrophys. Bull., 65, 1-25 (2010)>
=2010AstBu..65....1K 2010AstBu..65....1K
ADC_Keywords: Galaxy catalogs ; Galaxies, IR ; Morphology ;
Photometry, infrared; Space velocities
Keywords: catalogs: galaxies - galaxies: fundamental parameters -
infrared: galaxies - velocities: space velocities
Abstract:
We undertook searches for isolated galaxies based on automatic
selection of infrared sources from the Two Micron All-Sky Survey
(2MASS, Cat. II/246) followed by a visual inspection of their
surrounding. Using a modified criterion by Karachentseva
(1973SoSAO...8....3K 1973SoSAO...8....3K), we compiled a catalog of 3227 isolated galaxies
(2MIG) containing 6% of 2MASS Extended Sources (2MASX, Cat. VII/233)
brighter than Ks=12mag with angular diameters aK≤30". The most
isolated 2493 galaxies among them enter in the 2MASS Very Isolated
Galaxy Catalog, 2MVIG. Being situated in the regions of extremely low
mass density, the 2MVIG galaxies can serve as a reference sample for
investigation the influence of environment on structure and evolution
of galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
2mig.dat 106 3227 2MASS-selected Isolated Galaxies Catalog (2MIG)
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See also:
VII/82 : Catalogue of Isolated Galaxies (Karachentseva+ 1986)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/other/BSAO/57.5 : 2MASS-selected Flat Galaxy Catalog, 2MGGC (Mitronova+ 2004)
Byte-by-byte Description of file: 2mig.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- 2MIG Galaxy number
6- 7 I2 h RAh Right Ascension (J2000.0)
8- 9 I2 min RAm Right Ascension (J2000.0)
10- 14 F5.2 s RAs Right Ascension (J2000.0)
15 A1 --- DE- Declination sign (J2000.0)
16- 17 I2 deg DEd Declination (J2000.0)
18- 19 I2 arcmin DEm Declination (J2000.0)
20- 23 F4.1 arcsec DEs Declination (J2000.0)
25- 40 A16 --- Name Galaxy name in the known catalogs
41- 45 F5.1 arcsec r K-band fiducial elliptical Kron radius
48- 52 F5.2 mag Ksmag Ks-band fiducial elliptical Kron magnitude
55- 57 I3 --- 2s Dimensionless "separation" between isolated
galaxy and its nearest significant neighbour
60- 64 I5 km/s HRV ? Heliocentric radial velocity taken from LEDA
or NED databases
67- 68 I2 --- T Morphological type in de Vaucouleurs' scale
(T=-2 is any elliptical galaxies)
70 I1 --- N ? Number of significant neighbours of the
isolated galaxy detected during our
additional inspection on DSS (1)
73-106 A34 --- Comm ? Comments (2)
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Note (1): A blank means that the galaxy belongs to 2MVIG
(2MASS Very Isolated Galaxy)
Note (2): Comments about galaxy morphological peculiarity and its
identification in NED with CIG (Cat. VII/82), IRAS (Cat. II/125),
as well as the catalogs and lists of active and peculiar galaxies;
Vc indicates a companion with nearby (≤500km/s) velocities
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Acknowledgements:
Valentina Karachentseva, valkarach(at)gmail.com
Sofia Mitronova, mit(at)sao.ru
Olga Melnyk, melnykov(at)svitonline.com
Igor Karachentsev, ikar(at)sao.ru
History:
* 18-Dec-2009: original vesion (from Valentina Karachentseva)
* 25-Mar-2011: cross-identification of 2MIG 2008 with KIG644 removed
(from H.Andernach, confirmed by the author)
(End) S. Mitronova [SAO RAS Nizhnii Arkhyz Russia], P. Vannier [CDS] 18-Dec-2009