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The Second Kiso Survey for ultraviolet-excess galaxies. V.
The catalogue list and the identification chart of ultraviolet(UV)-excess galaxies, which have been detected on two or three-colorKiso Schmidt plates, are presented for 10 Schmidt fields. Catalogued are127 objects, down to the photographic magnitude ~17.5 in the sky area ofsome 300 square degrees. The number of KUGs detected in this paper ismuch smaller than that of the high galactic area, and the total numberof KUGs newly detected in the second survey reaches up to 1,954.
| An IRAS High Resolution Image Restoration (HIRES) Atlas of All Interacting Galaxies in the IRAS Revised Bright Galaxy Sample
The importance of far-infrared observations for our understanding ofextreme activity in interacting and merging galaxies has beenillustrated by many studies. Even though two decades have passed sinceits launch, the most complete all-sky survey to date from which far-IRselected galaxy samples can be chosen is still that of the InfraredAstronomical Satellite (IRAS). However, the spatial resolution of theIRAS all-sky survey is insufficient to resolve the emission fromindividual galaxies in most interacting galaxy pairs, and hence previousstudies of their far-IR properties have had to concentrate either onglobal system properties or on the properties of very widely separatedand weakly interacting pairs. Using the HIRES image reconstructiontechnique, it is possible to achieve a spatial resolution ranging from30" to 1.5m (depending on wavelength and detector coverage), whichis a fourfold improvement over the normal resolution of IRAS. This issufficient to resolve the far-IR emission from the individual galaxiesin many interacting systems detected by IRAS, which is very importantfor meaningful comparisons with single, isolated galaxies. We presenthigh-resolution 12, 25, 60, and 100 μm images of 106 interactinggalaxy systems contained in the IRAS Revised Bright Galaxy Sample (RBGS,Sanders et al.), a complete sample of all galaxies having a 60 μmflux density greater than 5.24 Jy. These systems were selected to haveat least two distinguishable galaxies separated by less than threeaverage galactic diameters, and thus we have excluded very widelyseparated systems and very advanced mergers. Additionally, some systemshave been included that are more than three galactic diameters apart,yet have separations less than 4' and are thus likely to suffer fromconfusion in the RBGS. The new complete survey has the same propertiesas the prototype survey of Surace et al. We find no increased tendencyfor infrared-bright galaxies to be associated with other infrared-brightgalaxies among the widely separated pairs studied here. We find smallenhancements in far-IR activity in multiple galaxy systems relative toRBGS noninteracting galaxies with the same blue luminosity distribution.We also find no differences in infrared activity (as measured byinfrared color and luminosity) between late- and early-type spiralgalaxies.
| Extended mid-infrared emission from VV 114: Probing the birth of a ULIRG
We present our 5-16 mu m spectro-imaging observations of VV114, an infrared luminous early-stage merger of two galaxiesVV 114E and VV 114W, taken with the ISOCAM camera on-board the InfraredSpace Observatory. We find that only 40% of the mid-infrared (MIR) fluxis associated with a compact nuclear region of VV 114E, while the restof the emission originates from a rather diffuse component extended overseveral kpc in the regions between VV 114E and VV 114W. This is in starkcontrast with the very compact MIR starbursts usually seen in luminousand ultraluminous infrared galaxies. A secondary peak of MIR emission isassociated with an extra-nuclear star forming region of VV 114W whichdisplays the largest Hα equivalent width in the whole system.Comparing our data with the distribution of the molecular gas and colddust, as well as with radio observations, it becomes evident that theconversion of molecular gas into stars can be triggered over large areasat the very first stages of an interaction. This extended star formationalong with the extreme nuclear starburst observed in VV 114E can easilylead to the heating of dust grains found in the tidally disturbed disksof the progenitor galaxies and subsequently traced via their MIRemission. The presence of a very strong continuum at the 5-6.5 mu mrange in the spectrum of VV 114E indicates that an enshrouded activegalactic nucleus (AGN) may contribute to ~ 40% of its MIR flux. Wefinally note that the relative variations in the UV to radio spectralproperties between VV 114E and VV 114W provide evidence that theextinction-corrected star formation rate of similar objects at high z,such as those detected in optical deep surveys, cannot be accuratelyderived from their rest-frame UV properties. Based on observations withthe ISO satellite, an ESA project with instruments funded by ESA MemberStates (especially the PI countries: France, Germany, the Netherlandsand the United Kingdom) and with the participation of ISAS and NASA.
| The Southern Sky Redshift Survey
We report redshifts, magnitudes, and morphological classifications for5369 galaxies with m_B <= 15.5 and for 57 galaxies fainter than thislimit, in two regions covering a total of 1.70 sr in the southerncelestial hemisphere. The galaxy catalog is drawn primarily from thelist of nonstellar objects identified in the Hubble Space TelescopeGuide Star Catalog (GSC). The galaxies have positions accurate to ~1"and magnitudes with an rms scatter of ~0.3 mag. We compute magnitudes(m_SSRS2) from the relation between instrumental GSC magnitudes and thephotometry by Lauberts & Valentijn. From a comparison with CCDphotometry, we find that our system is homogeneous across the sky andcorresponds to magnitudes measured at the isophotal level ~26 magarcsec^-2. The precision of the radial velocities is ~40 km s^-1, andthe redshift survey is more than 99% complete to the m_SSRS2 = 15.5 maglimit. This sample is in the direction opposite that of the CfA2; incombination the two surveys provide an important database for studies ofthe properties of galaxies and their large-scale distribution in thenearby universe. Based on observations obtained at Cerro TololoInter-American Observatory, National Optical Astronomy Observatories,operated by the Association of Universities for Research in Astronomy,Inc., under cooperative agreement with the National Science Foundation;Complejo Astronomico El Leoncito, operated under agreement between theConsejo Nacional de Investigaciones Científicas de laRepública Argentina and the National Universities of La Plata,Córdoba, and San Juan; the European Southern Observatory, LaSilla, Chile, partially under the bilateral ESO-ObservatórioNacional agreement; Fred Lawrence Whipple Observatory;Laboratório Nacional de Astrofísica, Brazil; and the SouthAfrican Astronomical Observatory.
| 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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