J/MNRAS/357/819 Colours and HI line observations in Virgo (Sabatini+, 2005) ================================================================================ The dwarf low surface brightness galaxy population of the Virgo Cluster - II. Colours and HI line observations. Sabatini S., Davies J., Van Driel W., Baes M., Roberts S., Smith R., Linder S., O'neil K. =2005MNRAS.357..819S ================================================================================ ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; H I data Keywords: galaxies: clusters: individual: Virgo Cluster - galaxies: dwarf Abstract: In order to investigate the nature of dwarf low surface brightness (LSB) galaxies we have undertaken a deep B- and I-band CCD survey of a 14-deg^2^ strip in the Virgo Cluster and applied a Fourier convolution technique to explore its dwarf galaxy population down to a central surface brightness of ~26Bmag/arcsec^2^ and a total absolute B magnitude of ~-10. In this paper we carry out an analysis of their morphology, (B-I) colours and atomic hydrogen content. Description: The optical data that we use in this paper are part of the 2.5-m Isaac Newton Telescope Wide Field Camera (INT WFC) survey of the Virgo Cluster (see paper I, Sabatini et al., 2003MNRAS.341..981S, for further details). Here we present results from the west-east B- and i-band strip in the cluster, extending from the centre of the cluster (identified as M87) eastwards for 7{deg}, with a total area of 14deg^2^. This region of the cluster is part of the dynamical unit named cluster A (M87), excluding members of other units like cluster B, clouds M and W. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table3.dat 80 236 Objects not detected in H I at Arecibo -------------------------------------------------------------------------------- See also: J/ApJS/128/99 : HST photometry of 4 Virgo LSB galaxies (O'Neil+, 2000) J/A+A/428/823 : HI catalog of low surface brightness galaxies (O'Neil+, 2004) J/A+A/365/1 : HI observations of LSB galaxies (Matthews+, 2001) J/A+A/405/99 : LSB galaxies in near-infrared. I. (Monnier-Ragaigne+, 2003) J/A+A/408/67 : LSB galaxies in near-infrared. II. (Monnier-Ragaigne+, 2003) J/A+A/408/465 : LSB galaxies in near-infrared. III. (Monnier-Ragaigne+, 2003) Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 I3 --- [SDV2005] ? Sequential number 5- 11 A7 --- Name Identification from other catalogues (1) 13- 14 I2 h RAh Right ascension (J2000.0) 16- 17 I2 min RAm Right ascension (J2000.0) 19- 20 I2 s RAs Right ascension (J2000.0) 22 A1 --- DE- Declination sign (J2000.0) 23- 24 I2 deg DEd Declination (J2000.0) 26- 27 I2 arcmin DEm Declination (J2000.0) 29- 30 I2 arcsec DEs Declination (J2000.0) 32- 39 A8 --- TType Morpholigical T type 41- 44 F4.1 mag Btmag Total apparent blue magnitude 46- 49 F4.1 mag/arcsec2 SuBrB ? Central blue surface brightness 51 I1 arcsec alphaB ? Disc scalelength 53- 56 F4.1 mag B-Ic ? Johnson-Cousins B-I colour index 58- 61 F4.1 mJy rms ?=- rms noise level of H I spectrum 63 A1 --- l_IHI Limit flag on IHI 64- 67 F4.1 Jy.km/s IHI ? Estimated 3 sigma upper limit to the integrated H I line flux, for assumed 75km/s wide flat-topped profiles 69 A1 --- l_MHI Limit flag on MHI 70- 73 F4.1 10+7solMass MHI ? Estimated upper limit to the H I mass, at the assumed 16Mpc distance of the Virgo Cluster 75 A1 --- l_MHI/LB Limit flag on MHI/LB 76- 80 F5.1 Sun MHI/LB ? Estimated upper limit to H I mass to blue luminosity ratio -------------------------------------------------------------------------------- Note (1): tNNN = [TH2002] NNN in Simbad -------------------------------------------------------------------------------- History: * 04-Nov-2005: From electronic version of the journal * 27-Jan-2006: table3, #111: name changed from VCC1717 into VCC1794. (VCC1717 is #181) References: Sabatini et al., Paper I 2003MNRAS.341..981S ================================================================================ (End) Patricia Vannier [CDS] 04-Nov-2005