J/ApJ/314/493 Boo Void survey (Kirshner+, 1987)
A survey of the Bootes Void.
Kirshner R.P., Oemler A.Jr, Schechter P.L., Shectman S.A.
<Astrophys. J. 314, 493 (1987)>
=1987ApJ...314..493K 1987ApJ...314..493K (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Redshifts
Keywords: galaxies: clustering - galaxies: redshifts
Abstract:
In an earlier paper we inferred, from the distribution of galaxy
redshifts in three small fields ∼30° apart, the existence of a
106Mpc3 void in the distribution of galaxies in the constellation
of Bootes. In this paper, we describe a redshift survey undertaken to
test that hypothesis. Galaxies were selected by eye from 283 small
fields distributed between the three original fields, and redshifts
were measured for 239 of them. We confirm the existence of a large,
roughly spherical void, of radius 62Mpc, centered at α=14h50,
δ=+46°, v=15500km/s. The low density of this region is of
high statistical significance and does not appear easily reconcilable
with any of the popular models for the growth of structure in the
universe. This void does contain some unusual galaxies characterized
by strong, high-excitation emission spectra, but not in sufficient
numbers to compensate for the absence of more usual objects.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 30 283 Survey fields
table2.dat 36 300 The galaxy sample
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Field Field number
6- 7 I2 h RAh Right ascension (1950)
9- 10 I2 min RAm Right ascension (1950)
12- 13 I2 s RAs Right ascension (1950)
16 A1 --- DE- Declination sign (1950)
17- 18 I2 deg DEd Declination (1950)
20- 21 I2 arcmin DEm Declination (1950)
23- 24 I2 arcsec DEs Declination (1950)
26- 30 F5.2 mag Vlim Limiting V magnitude
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (1950)
4- 5 I2 min RAm Right ascension (1950)
7- 8 I2 s RAs Right ascension (1950)
10 A1 --- DE- Declination sign (1950)
11- 12 I2 deg DEd Declination (1950)
14- 15 I2 arcmin DEm Declination (1950)
17- 18 I2 arcsec DEs Declination (1950)
21- 23 I3 --- Field Field number
25- 29 F5.3 --- Rank Fractional rank (1)
31- 35 I5 km/s cz ? Heliocentric velocity
36 A1 --- r_cz [ab] Origin of cz (2)
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Note (1): Fractional rank of brightness, defined as that the 283d galaxy has
a rank of 1.00.
Note (2): a: from CfA (Cat. VII/193) survey
b: from RC2 (Cat. VII/112)
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History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 31-May-1999