J/other/AstBu/70.1 Galaxies in Leo/Cnc region (Karachentsev+, 2015)
Large-scale structure and galaxy motions in the Leo/Cancer constellations.
Karachentsev I.D., Nasonova O.G., Karachentseva V.E.
<Astrophys. Bull., 70, 1 (2015)>
=2015AstBu..70....1K 2015AstBu..70....1K
ADC_Keywords: Galaxy catalogs ; Redshifts ; Morphology
Keywords: galaxies: kinematics and dynamics - galaxies: distances and
redshifts - galaxies: groups
Abstract:
In the region of the sky limited by the coordinates RA=7.0h...12.0h,
Dec=0°...+20° and extending from the Virgo Cluster to the
South Pole of the Local Supercluster, we consider the data on the
galaxies with radial velocities VLG≲2000km/s. For 290 among
them, we determine individual distances and peculiar velocities. In
this region, known as the local velocity anomaly zone, there are 23
groups and 20 pairs of galaxies for which the estimates of
virial/orbital masses are obtained. A nearby group around NGC3379 =
Leo I and NGC3627 as well as the Local Group show the motion from the
Local Void in the direction of Leo cloud with a characteristic
velocity of about 400 km/s. Another rich group of galaxies around
NGC3607 reveals peculiar velocity of about -420km/s in the frame of
reference related with the cosmic background radiation. A peculiar
scattered association of dwarf galaxies Gemini Flock at a distance of
8Mpc has the radial velocity dispersion of only 20km/s and the size
of approximately 0.7Mpc. The virial mass estimate for it is 300 times
greater than the total stellar mass. The ratio of the sum of virial
masses of groups and pairs in the Leo/Can region to the sum of stellar
masses of the galaxies contained in them equals 26, which is
equivalent to the local average density Ωm(local)=0.074,
which is 3-4 times smaller than the global average density of matter.
Description:
The table contains original observational data on 543 galaxies in the
Leo/Cancer region. The initial sample was extracted from HyperLeda
Database; then fictitious "galaxies" (72%) were removed. Selecting
the galaxies in our list, we also checked and updated their different
characteristics. In particular, we have determined distances for 139
galaxies from the Tully-Fisher relation. The resulting sample includes
290 galaxies with individual distance estimates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
leocan.dat 77 543 Observational data on the Leo/Cancer galaxies
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See also:
J/A+A/532/A104 : Galaxies in the Fornax cluster region (Nasonova+, 2011)
Byte-by-byte Description of file: leocan.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Galaxy name
12- 13 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
16- 19 F4.1 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21- 22 I2 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000)
25- 26 I2 arcsec DEs Declination (J2000)
29- 32 I4 km/s VLG Radial velocity relative to the Local Group
34- 37 I4 km/s V3K Radial velocity relative to the 3K CMB radiation
39- 43 F5.2 mag Bmag Integral apparent magnitude in the B-band
46- 48 I3 km/s W50 ? Half-width of the 21cm line, measured at
50% of the maximum intensity
52- 56 F5.2 Mpc D [0/47]? Distance
58- 60 A3 --- n_D Method used to measure distance (1)
63- 66 A4 --- MType Morphological type
67 A1 --- u_MType Uncertainty flag on morphological type
70- 77 A8 --- Group Name of the brightest galaxy in the group
to which a given galaxy belongs
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Note (1): Methods as follows:
rgb = luminosity of the tip of the red giant branch
cep = Cepheids
SN = supernova
sbf = surface brightness fluctuations
mem = obvious membership of galaxies in known groups
tf = Tully-Fisher relation between W_50 and the luminosity of the galaxy,
the median distance estimates adopted from NED
TF = Tully-Fisher relation, our estimates based on Tully et al.
(2009AJ....138..323T 2009AJ....138..323T)
TFb = Tully-Fisher relation, our estimates using the value m_21 instead of m_B
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Acknowledgements:
Olga G. Kashibadze, phiruzi(at)gmail.om
(End) Patricia Vannier [CDS] 18-Feb-2015