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|Objects from a Cross-Identification of the IRAS and Low-Frequency Texas Radio Catalogs|
A cross-identification of objects in the low-frequency (365 MHz) Texasradio catalog and in IRAS catalogs at four infrared wavelengths hasyielded a list of 715 objects for further studies. Objects with steepspectra for which the difference in the centers of gravity of the radioand infrared sources was less than 3″ were selected from thislist. Seventeen of the objects have been observed at six wavelengthsusing the RATAN-600 radio telescope. Spectra of nine objects from theinitial list for which there were candidate optical counterparts wereobtained using the 2.1-m telescope of the INAOE. The results of theseobservations are discussed. The presence of steep spectral indices forthe radio sources is confirmed. The possible optical counterpartsinclude interacting galaxies, an infrared galaxy, two emission-linegalaxies, and a candidate BL Lac object. Optical images of the opticalcounterparts are presented together with radio and optical spectra.
|Kinematics of the local universe. VII. New 21-cm line measurements of 2112 galaxies|
This paper presents 2112 new 21-cm neutral hydrogen line measurementscarried out with the meridian transit Nan\c cay radiotelescope. Amongthese data we give also 213 new radial velocities which complement thoselisted in three previous papers of this series. These new measurements,together with the HI data collected in LEDA, put to 6 700 the number ofgalaxies with 21-cm line width, radial velocity, and apparent diameterin the so-called KLUN sample. Figure 5 and Appendices A and B forcorresponding comments are available in electronic form at thehttp://www.edpsciences.com
|The morphological catalogue of galaxies equatorial survey|
We present 865 redshifts of galaxies located in the equatorial stripdelta between -17.5 deg and -2.5 deg in the right ascension rangebetween 20 h and 5 h. Redshifts have been obtained for the completesample of all 833 galaxies in the Morphological Catalog of Galaxies withmagnitudes brighter than m = 14.5 (corresponding approximately tom(Zwicky) = 15.0). This sample also includes three galaxies from othersources with more reliable magnitudes, satisfying this limit, and 29fainter galaxies, usually companions of the galaxies in the magnitudelimited sample. Our maps of a very large volume of nearby spacedemonstrate a variety of coherent large scale structures which includelarge voids, 20-50/h Mpc in diameter and large walls at least 70/h Mpcacross.
|Southern extension of the Perseus Supercluster?|
In order to investigate in 3D the galaxian density enhancement locatedin the south of the Pisces Perseus Supercluster, a redshift survey isconducted of early-type galaxies with a diameter greater than 1 arcminin a region bounded by 20 h and 6 h, and -20 and 0 deg. Data presentedinclude those for 157 radial velocities which, added to all thepreviously known redshifts in this region, show a galaxy distributionconcentrated around 5000 km/s and the presence of a void of about 25/hMpc. These two characteristics are the same as the ones found by Haynesand Giovanelli (1989), in the northern part of the Pisces PerseusSupercluster, suggesting that it could extend toward the south. Acomparison with the recent data obtained in the same region byPellegrini et al. (1990) is presented.
|Catalogue of star clusters and associations. Suppl. 1 to the 2nd edition.|
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