J/MNRAS/482/4329 Void galaxies in the nearby Universe (Pustilnik+, 2019)
Void galaxies in the nearby Universe. I. Sample description.
Pustilnik S.A., Tepliakova A.L., Makarov D.I.
<Mon. Not. R. Astron. Soc., 482, 4329-4345 (2019)>
=2019MNRAS.482.4329P 2019MNRAS.482.4329P (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Photometry ; Space velocities
Keywords: catalogues - galaxies: dwarf - galaxies: evolution -
galaxies: formation - galaxies: general -
large-scale structure of Universe; astrophysics -
astrophysics of Galaxies
Abstract:
The main goal of this work is to form a large, deep and representative
sample of dwarf galaxies residing in voids of the nearby Universe. The
formed sample is the basement for the comprehensive mass study of the
galaxy content, their evolutionary status, clustering and dynamics
with respect to their counterparts residing in more typical, denser
regions and for study of void small-scale substructures. We present 25
voids over the entire sky within 25Mpc from the Local Group. They are
defined as groups of lumped empty spheres bounded by `luminous'
galaxies with the absolute K-band magnitudes brighter than -22.0. The
identified void regions include the Local Void and other known nearby
voids. The nearest nine voids occupy a substantial part of the Local
Volume. Of the total number of 6792 cataloged galaxies in the
considered volume, 1354 objects fall into 25 nearby voids. Of this
general void galaxy sample, we separate the sub-sample of 'inner' void
galaxies, residing deeper in voids, with distances to the nearest
luminous galaxy DNN>2.0Mpc. The 'inner' galaxy sample includes 1088
objects, mostly dwarfs with MB distribution peaked near -15.0 and
extending down to -7.5mag. Of them, 195 fall in the Local Volume
(space within R=11Mpc). We present the general statistical properties
of this Nearby Void Galaxy sample and discuss the issues related to
the sample content and the prospects of its use.
Description:
Main parameters of nearby voids and void galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 88 25 Parameters of nearby voids
table2.dat 172 1088 Parameters of 'inner' void galaxies (DNN=>2)
table3.dat 198 266 Parameters of 'outer' void galaxies (DNN<2)
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See also:
J/ApJ/676/184 : Peculiar motion away from the Local Void (Tully+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Void [1/25] Void number
4- 14 A11 --- Name Void name
17- 21 F5.2 h RAhour Center Right Ascension J2000 (decimal hours)
23- 27 F5.1 deg DEdeg Center Declination J2000 (decimal degrees)
29- 32 F4.1 Mpc Dist Center distance (Mpc)
35- 36 I2 Mpc Ext.X Maximal extent along supergalactic X (Mpc)
38- 39 I2 Mpc Ext.Y Maximal extent along supergalactic Y (Mpc)
41- 42 I2 Mpc Ext.Z Maximal extent along supergalactic Z (Mpc)
45- 46 I2 --- NSph.ori Number of initial spheres
48- 49 I2 --- NSph.join Number of joined spheres
51- 53 I3 --- NGal.tot Number of galaxies in void
55- 57 I3 --- NGal.inn Number of inner galaxies in void
59- 88 A30 --- Notes Notes
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Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 28 A28 --- Name Object name
30 A1 --- J [J]
31- 32 I2 h RAh Right ascension (J2000)
33- 34 I2 min RAm Right ascension (J2000)
35- 38 F4.1 s RAs Right ascension (J2000)
39 A1 --- DE- Declination sign (J2000)
40- 41 I2 deg DEd Declination (J2000)
42- 43 I2 arcmin DEm Declination (J2000)
44- 45 I2 arcsec DEs Declination (J2000)
47- 50 I4 km/s HV Heliocentric velocity
52- 54 I3 km/s e_HV Velocity error
56- 59 I4 km/s VLG Velocity with respect of the Local Group
61- 64 I4 km/s Vdist Velocity, corresponding to Distance (1)
66- 70 F5.2 mag Btot ? Total B magnitude
72- 76 F5.2 mag AB B band extinction
78- 83 F6.2 mag BMAG ? Absolute B magnitude
85- 90 F6.2 mag KMAG ? Absolute K magnitude
92- 96 F5.2 Mpc DNN Distance to the nearest luminous neighbour
98- 99 I2 --- Void [1/25] Void number (from table1.dat)
101-198 A98 --- Notes Notes (2)
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Note (1): Vdist is either adopted from independent (mostly TRGB) distance (D)
measurements as D(Mpc)/73, or calculated from VLG using the correction for
the local peculiar velocity by Tully et al. (2008, Cat. J/ApJ/676/184).
Note (2): Notes on some of individual void galaxies, mostly on their clustering.
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Acknowledgements:
Arina Tepliakova, arina.tepliakova(at)gmail.com
(End) Patricia Vannier [CDS] 08-Feb-2019