J/MNRAS/333/423 Luminosity function of the Virgo Cluster (Trentham+, 2002)
The luminosity function of the Virgo Cluster from MB = -22 to -11.
Trentham N., Hodgkin S.
<Mon. Not. R. Astron. Soc. 333, 423 (2002)>
=2002MNRAS.333..423T 2002MNRAS.333..423T
ADC_Keywords: Clusters, galaxy ; Photometry, CCD
Keywords: galaxies: clusters: individual: Virgo -
galaxies: luminosity function, mass function
Abstract:
We measure the galaxy luminosity function (LF) for the Virgo Cluster
between blue magnitudes MB=-22 and -11 from wide-field
charge-coupled device (CCD) imaging data.
The data used here were taken on various observing runs during Spring
1999 and Spring 2000 as part of the INT Wide Field Survey (WFS;
http://www.ast.cam.ac.uk/wfcsur ; McMahon et al.,
2001NewAR..45...97M 2001NewAR..45...97M).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 95 449 The sample
--------------------------------------------------------------------------------
See also:
J/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)
J/A+AS/127/367 : Virgo Photometry Catalogue (VPC) (Young+ 1998)
J/A+A/343/86 : Virgo cluster radio luminosity function. I. (Gavazzi+ 1999)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- [TH2002] Sequential number
4- 5 A2 --- n_[TH2002] [* ] Note on [TH2002] (1)
7- 21 A15 --- Name Galaxy name as appearing in the NASA/IPAC
Extragalactic Data Base (2)
23- 27 A5 --- MType Morphological type (3)
29- 30 I2 h RAh Right ascension (J2000)
32- 33 I2 min RAm Right ascension (J2000)
35- 39 F5.2 s RAs Right ascension (J2000)
41 A1 --- DE- Declination sign
42- 43 I2 deg DEd Declination (J2000)
45- 46 I2 arcmin DEm Declination (J2000)
48- 51 F4.1 arcsec DEs Declination (J2000)
53- 56 I4 km/s HRV ? Heliocentric radial velocity
58- 62 F5.2 --- B(6)mag Apparent blue magnitude measured within
a 6-arcsec radius
64- 68 F5.2 --- ICP Inner concentration parameter
70- 74 F5.2 --- OCP ? Outer concentration parameter
75 A1 --- f_OCP [e] e: at edge
77- 81 F5.2 mag BTmag Total blue magnitude
83- 86 F4.2 --- Pmemb ? Nominal probability of being a cluster member
88 I1 -- Memb [0/2] Galaxy rating (4)
90- 95 F6.2 mag BMAG Absolute B magnitude
--------------------------------------------------------------------------------
Note (1): For the very brightest galaxies (BT<15) we adopt the RC3
values when available, since these galaxies normally extended beyond
the edges of a single CCD chip in our data. For the majority of
galaxies we computed BT from the magnitudes within a 12-arcsec
aperture, corrected for light at large radius that has fallen below
the sky using the prescription of Tully et al. (1996, Cat.
J/AJ/112/2471).
For objects labelled **, the companions prevent a fit from giving
meaningful h and I0 values (this effect was not significant for
objects labelled *), so the BT values were derived individually by
identifying a symmetry axis and computing the flux from the part of
the galaxy on the other side of this axis from the companion and
multiplying this flux by 2. Additionally, VCC 2062 was treated this
way, since the light from this irregular galaxy peaks so far away from
its centre.
Note (2): The VCC numbers refer to the Virgo Cluster Catalog,
Binggeli et al. (1985AJ.....90.1681B 1985AJ.....90.1681B) and the IBM88 designations
refer to objects studied by Impey et al. (1988ApJ...330..634I 1988ApJ...330..634I).
Note (3): Morphological types:
E: elliptical galaxy,
S0: lenticular galaxy,
S: spiral galaxy,
with the following letters indicating the Hubble type,
BCD: blue compact dwarf,
VLSB: very low surface brightness galaxy
Note (4): Galaxy rating:
0: Confirmed member
1: Probable member
2: Possible member
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 27-Sep-2002