J/MNRAS/458/1590 Deep spectroscopy of Abell 85 (Agulli+, 2016)
Deep spectroscopy of nearby galaxy clusters.
I. Spectroscopic luminosity function of Abell 85.
Agulli I., Aguerri J.A.L., Sanchez-Janssen R., Dalla Vecchia C.,
Diaferio A., Barrena R., Palmero L.D., Yu H.
<Mon. Not. R. Astron. Soc., 458, 1590-1603 (2016)>
=2016MNRAS.458.1590A 2016MNRAS.458.1590A (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Photometry, SDSS
Keywords: galaxies: clusters: individual: A 85 - galaxies: dwarf -
galaxies: luminosity function, mass function
Abstract:
We present a new deep spectroscopic catalogue for Abell 85, within
3.0x2.6Mpc2 and down to Mr∼Mr*+6. Using the Visible
Multi-Object Spectrograph at the Very Large Telescope and the
AutoFiber 2 at the William Herschel Telescope, we obtained almost 1430
new redshifts for galaxies with mr≤21mag and
<µe,r>≤24mag/arcsec2. These redshifts, together with Sloan
Digital Sky Survey Data Release 6 and NASA/IPAC Extragaalctic Database
spectroscopic information, result in 460 confirmed cluster members.
This data set allows the study of the luminosity function (LF) of the
cluster galaxies covering three orders of magnitudes in luminosities.
The total and radial LFs are best modelled by a double Schechter
function. The normalized LFs show that their bright (Mr≤-21.5) and
faint (Mr≥-18.0) ends are independent of clustercentric distance
and similar to the field LFs unlike the intermediate luminosity range
(-21.5≤Mr≤-18.0). Similar results are found for the LFs of the
dominant types of galaxies: red, passive, virialized and early-infall
members. On the contrary, the LFs of blue, star forming,
non-virialized and recent-infall galaxies are well described by a
single Schechter function. These populations contribute to a small
fraction of the galaxy density in the innermost cluster region.
However, in the outskirts of the cluster, they have similar densities
to red, passive, virialized and early-infall members at the LF faint
end. These results confirm a clear dependence of the colour and star
formation of Abell 85 members in the cluster centric distance.
Description:
File a85_memb.dat contains 5 columns with the sky coordinates
(RA;DE), the r and g band magnitudes and the recessional velocities
for each 460 confirmed members of Abell 85 cluster. Details on the
data set can be found in the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
a85_memb.dat 45 460 List of spectroscopically confirmed members of
Abell 85
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Byte-by-byte Description of file: a85_memb.dat
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Bytes Format Units Label Explanations
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1- 8 F8.5 deg RAdeg Right ascension (J2000)
10- 17 F8.5 deg DEdeg Declination (J2000)
19- 23 F5.2 mag rmag r-band magnitude (SDSS) (1)
25- 29 F5.2 mag gmag g-band magnitude (SDSS) (1)
31- 35 I5 km/s cz Recessional velocity of the galaxy
37- 39 I3 km/s e_cz ?=0 Error from the cross correlation (VLT/WHT)
or from SDSS, NED values are without
errors (2)
41- 45 A5 --- Cat The observational run/catalogue where the
cz is from
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Note (1): The model magnitudes corrected for extinction taken from SDSS
Note (2): The uncertainties/observations are discussed in the paper.
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Acknowledgements:
Irene Agulli, ireagu(at)iac.es
J. Alfonso L. Aguerri, jalfonso(at)iac.es
(End) Irene Agulli [IAC], Patricia Vannier [CDS] 07-Jul-2016