Upload your image
DSS Images Other Images
Submit a new article
|Radio Continuum Emission at 1.4 GHz from KISS Emission-Line Galaxies|
We have searched the Faint Images of the Radio Sky at Twenty centimeters(FIRST) and the NRAO VLA Sky Survey (NVSS) 1.4 GHz radio surveys forsources that are coincident with emission-line galaxy (ELG) candidatesfrom the KPNO International Spectroscopic Survey (KISS). A total of 207of the 2157 KISS ELGs (~10%) in the first two Hα-selected surveylists were found to possess radio detections in FIRST, NVSS, or both.Follow-up spectra exist for all of the radio detections, allowing us todetermine the activity type (star-forming vs. active nucleus) for theentire sample. We explore the properties of the radio-detected KISSgalaxies in order to gain a better insight into the nature ofradio-emitting galaxies in the local universe (z<0.1). No dwarfgalaxies were detected, despite the large numbers of low-luminositygalaxies present in KISS, suggesting that lower mass, lower luminosityobjects do not possess strong galaxian-scale magnetic fields. Because ofthe selection technique used for KISS, our radio ELGs represent aquasi-volume-limited sample, which allows us to develop a clearerpicture of the radio galaxy population at low redshift. Nearlytwo-thirds of the KISS radio galaxies are starburst or star-forminggalaxies, which is in stark contrast to the results of flux-limitedradio surveys, which are dominated by active galactic nuclei (AGNs) andelliptical galaxies (i.e., classical radio galaxies). While there aremany AGNs among the KISS radio galaxies, there are no objects with largeradio powers in our local volume. We derive a radio luminosity function(RLF) for the KISS ELGs that agrees very well with previous RLFs thatadequately sample the lower luminosity radio population.
|The KPNO International Spectroscopic Survey. IV. Hα-selected Survey List 2|
The KPNO International Spectroscopic Survey (KISS) is an objective-prismsurvey for extragalactic emission-line objects. It combines many of thefeatures of previous slitless spectroscopic surveys with the advantagesof modern CCD detectors and is the first purely digital objective-prismsurvey for emission-line galaxies. Here we present the second list ofemission-line galaxy candidates selected from our red spectral data,which cover the wavelength range 6400 to 7200 Å. In most cases,the detected emission line is Hα. The current survey list covers a1.6d-wide strip located at δ=43°30' (B1950) and spans theright ascension range 11h55m to16h15m. The survey strip runs through the centerof the Bootes void and has enough depth to adequately sample the farside of the void. An area of 65.8 deg2 is covered. A total of1029 candidate emission-line objects have been selected for inclusion inthe survey list (15.6 deg-2). We tabulate accuratecoordinates and photometry for each source, as well as estimates of theredshift and emission-line flux and equivalent width based onmeasurements of the digital objective-prism spectra. The properties ofthe KISS emission-line galaxies are examined using the availableobservational data. Although the current survey covers only a modestfraction of the total volume of the Bootes void, we catalog at least 12objects that appear to be located within the void. Only one of theseobjects has been recognized previously as a void galaxy.
|The UZC-SSRS2 Group Catalog|
We apply a friends-of-friends algorithm to the combined Updated ZwickyCatalog and Southern Sky Redshift Survey to construct a catalog of 1168groups of galaxies; 411 of these groups have five or more members withinthe redshift survey. The group catalog covers 4.69 sr, and all groupsexceed the number density contrast threshold, δρ/ρ=80. Wedemonstrate that the groups catalog is homogeneous across the twounderlying redshift surveys; the catalog of groups and their membersthus provides a basis for other statistical studies of the large-scaledistribution of groups and their physical properties. The medianphysical properties of the groups are similar to those for groupsderived from independent surveys, including the ESO Key Programme andthe Las Campanas Redshift Survey. We include tables of groups and theirmembers.
|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.
Submit a new link
Member of following groups:
Observation and Astrometry data
Catalogs and designations: