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|Kinematics of the Local Universe. XIII. 21-cm line measurements of 452 galaxies with the Nançay radiotelescope, JHK Tully-Fisher relation, and preliminary maps of the peculiar velocity field|
Aims.This paper presents 452 new 21-cm neutral hydrogen linemeasurements carried out with the FORT receiver of the meridian transitNançay radiotelescope (NRT) in the period April 2003-March 2005. Methods: This observational programme is part of a larger projectaiming at an exhaustive and magnitude-complete HI extragalacticcatalogue for Tully-Fisher applications (the so-called KLUN project, forKinematics of the Local Universe studies, to end in 2008). The wholeon-line HI archive of the NRT today contains reduced HI-profiles for4500 spiral galaxies of declination δ > -40°(http://klun.obs-nancay.fr). Results: As an example of thisapplication, we used the direct Tully-Fisher relation in three (JHK)bands in deriving distances to a large catalogue of 3126 spiral galaxiesdistributed through the whole sky and sampling the radial velocity rangewell between 0 and 8000 km s-1. Thanks to an iterative methodaccounting for selection bias and smoothing effects, we show a detailedand original map of the velocity field in the Local Universe as apreliminary output.Data Tables [see full text], [see full text], and [see full text]and HI-profiles (Fig. [see full text]) are only available inelectronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr(18.104.22.168) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/465/71
|A catalog of edge-on disk galaxies. From galaxies with a bulge to superthin galaxies|
Spiral galaxies range from bulge-dominated early-type galaxies to latetypes with little or no bulge. Cosmological models do not predict theformation of disk-dominated, essentially bulgeless galaxies, yet theseobjects exist. A particularly striking and poorly understood example ofbulgeless galaxies are flat or superthin galaxies with large axisratios. We therefore embarked on a study aimed at a better understandingof these enigmatic objects, starting by compiling a statisticallymeaningful sample with well-defined properties. The disk axis ratios canbe most easily measured when galaxies are seen edge-on. We used datafrom the Sloan Digital Sky Survey (SDSS) in order to identify edge-ongalaxies with disks in a uniform, reproducible, automated fashion. Inthe five-color photometric database of the SDSS Data Release 1 (2099deg^2) we identified 3169 edge-on disk galaxies, which we subdividedinto disk galaxies with bulge, intermediate types, and simple diskgalaxies without any obvious bulge component. We subdivided these typesfurther into subclasses: Sa(f), Sb(f), Sc(f), Scd(f), Sd(f), Irr(f),where the (f) indicates that these galaxies are seen edge-on. Here wepresent our selection algorithm and the resulting catalogs of the 3169edge-on disk galaxies including the photometric, morphological, andstructural parameters of our targets. A number of incompleteness effectsaffect our catalog, but it contains almost a factor of four morebulgeless galaxies with prominent simple disks (flat galaxies) withinthe area covered here than previous optical catalogs, which were basedon the visual selection from photographic plates (cf. Karachentsev etal. 1999, Bull. Special Astrophys. Obs., 47, 5). We find thatapproximately 15% of the edge-on disk galaxies in our catalog are flatgalaxies, demonstrating that these galaxies are fairly common,especially among intermediate-mass star-forming galaxies. Bulgelessdisks account for roughly one third of our galaxies when also puffydisks and edge-on irregulars are included. Our catalog provides auniform database for a multitude of follow-up studies of bulgelessgalaxies in order to constrain their intrinsic and environmentalproperties and their evolutionary status.
|The 2MASS-selected Flat Galaxy Catalog|
An all-sky catalog of 18020 disc-like galaxies is presented. Thegalaxies are selected from the Extended Source Catalog of the Two MicronAll-Sky Survey (XSC 2MASS) basing on their 2MASS axial ratio a/b ≥ 3.The Catalog contains data on magnitudes of a galaxy in the J, H,KS bands, its axial ratio, positional angle, index ofluminosity concentration, as well as identification of the galaxy withthe LEDA and the NED databases. Unlike the available optical catalogs,the new 2MFGC catalog seems to be more suitable to study cosmicstreaming on a scale of z <~ 0.1. The dipole moment of distributionof the bright (K < 11m) 2MFGC objects (l = 227°, b =41° or SGL = 90°, SGB = -43°) lies within statistical errors(±15°) in the direction of the IRAS dipole and the opticalRFGC dipole.
|Arcsecond Positions of UGC Galaxies|
We present accurate B1950 and J2000 positions for all confirmed galaxiesin the Uppsala General Catalog (UGC). The positions were measuredvisually from Digitized Sky Survey images with rms uncertaintiesσ<=[(1.2")2+(θ/100)2]1/2,where θ is the major-axis diameter. We compared each galaxymeasured with the original UGC description to ensure high reliability.The full position list is available in the electronic version only.
|Parameters of 2447 Southern Spiral Galaxies for Use in the Tully-Fisher Relation|
I-band luminosities, rotational velocities, and redshifts of 1092 spiralgalaxies have been measured by CCD photometry and Hα spectroscopyusing the 1 m and 2.3 m telescopes at Siding Spring Observatory,respectively. The results are tabulated. Luminosity profiles andHα rotation curves are given for the galaxies. When these resultsare combined with similar data for 1355 spiral galaxies publishedpreviously (Mathewson, Ford, & Buchhorn, hereafter Paper I), itprovides a large, uniform, and unique data set with which to measure,via the Tully-Fisher relation, the peculiar velocities of galaxies inthe local universe to a distance of 11,000 km s^-1^ (Mathewson &Ford). Taking advantage of the opportunity for publishing this data inmachine-readable form, in the CD-ROM, we have also included similar datafor the 1355 galaxies in Paper I.
|An image database. II. Catalogue between δ=-30deg and δ=70deg.|
A preliminary list of 68.040 galaxies was built from extraction of35.841 digitized images of the Palomar Sky Survey (Paper I). For eachgalaxy, the basic parameters are obtained: coordinates, diameter, axisratio, total magnitude, position angle. On this preliminary list, weapply severe selection rules to get a catalog of 28.000 galaxies, wellidentified and well documented. For each parameter, a comparison is madewith standard measurements. The accuracy of the raw photometricparameters is quite good despite of the simplicity of the method.Without any local correction, the standard error on the total magnitudeis about 0.5 magnitude up to a total magnitude of B_T_=17. Significantsecondary effects are detected concerning the magnitudes: distance toplate center effect and air-mass effect.
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