The association of IRAS sources and 12CO emission in the outer Galaxy
We have revisited the question of the association of CO emission withIRAS sources in the outer Galaxy using data from the FCRAO Outer GalaxySurvey (OGS). The availability of a large-scale high-resolution COsurvey allows us to approach the question of IRAS-CO associations from anew direction - namely we examined all of the IRAS sources within theOGS region for associated molecular material. By investigating theassociation of molecular material with random lines of sight in the OGSregion we were able to construct a quantitative means to judge thelikelihood that any given IRAS-CO association is valid and todisentangle multiple emission components along the line of sight. Thepaper presents a list of all of the IRAS-CO associations in the OGSregion. We show that, within the OGS region, there is a significantincrease ( ~ 22%) in the number of probable star forming regions overprevious targeted CO surveys towards IRAS sources. As a demonstration ofthe utility of the IRAS-CO association table we present the results ofthree brief studies on candidate zone-of-avoidance galaxies with IRAScounterparts, far outer Galaxy CO clouds, and very bright CO clouds withno associated IRAS sources. We find that ~ 25% of such candidate ZOAGsare Galactic objects. We have discovered two new far outer Galaxystar-forming regions, and have discovered six bright molecular cloudsthat we believe are ideal targets for the investigation of the earlieststages of sequential star formation around HII regions. Finally, thispaper provides readers with the necessary data to compare othercatalogued data sets with the OGS data.Tables 1, 2 and A1 are only available in electronic form at the CDS viaanonymous ftp to\ cdsarc.u-strasbg.fr (130.79.128.5) or via\http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/399/1083
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Version 2000 of the Catalogue of Galactic Planetary Nebulae
The ``Catalogue of Galactic Planetary Nebulae (Version 2000)'' appearsin Abhandlungen aus der Hamburger Sternwarte, Band XII in the year 2001.It is a continuation of CGPN(1967) and contains 1510 objects classifiedas galactic PNe up to the end of 1999. The lists of possible pre-PNe andpossible post-PNe are also given. The catalogue is restricted only tothe data belonging to the location and identification of the objects. Itgives identification charts of PNe discovered since 1965 (published inthe supplements to CGPN) and those charts of objects discovered earlier,which have wrong or uncertain identification. The question ``what is aplanetary nebula'' is discussed and the typical values of PNe and oftheir central stars are summarized. Short statistics about thediscoveries of PNe are given. The catalogue is also available in theCentre de Données, Strasbourg and at Hamburg Observatory viainternet. The Catalogue is only available in electronic form at the CDSvia anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/378/843
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V807 Cas is an Eclipsing Binary Star
Not Available
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The 74th Special Name-list of Variable Stars
We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.
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On the nature of the Galactic nebula We 1-12
In 1977, Weinberger published a list of 12 new extended possibleplanetary nebulae (PNe). Whereas, because of their characteristicmorphology and/or the presence of a blue central star, almost all ofthem could easily be suspected to be genuine planetary nebulae, oneobject (No. 12) captivated because of its unusually bright central star.This find prompted Kaler and Feibelman to question the PN nature of thisobject (We 1-12) on the basis of IUE spectra. A definite conclusioncould, however, not be drawn by them; thus, until now, the real natureof We 1-12 remained unsolved. For the first time, a spectralinvestigation of both the central star and the nebula is presented inthis paper. It definitely shows that this intriguing object is an(isolated) H II region and that its central star, as previously assumed,is an early B star which serves as the ionizing source. We 1-12, part ofwhich is coincident with a weak IRAS point source, is at a distance of2-2.6 kpc and is reddened by E(B-V) = 0.6-0.8 mag.
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A CS(2-1) survey of IRAS point sources with color characteristics of ultra-compact HII regions.
We have made a complete survey of the CS(2-1) emission toward IRAS pointsources in the galactic plane. The sources observed were selectedaccording to their far infrared (FIR) colors, which are characteristicof UC HII regions. They have 25μm/12μm flux ratios larger than 3.7and 60μm/12μm flux ratios larger than 19.3. The survey covered aregion from b=-2deg to b=2deg from l=300deg to l=0deg and from l=0deg tol=60deg, and from b=-4deg to b=4deg elsewhere. We detected 843 sourcesout of 1427 sources observed. The distributions of detected andundetected sources in a FIR color-color diagram show some differences,suggesting that more than one type of object is present in our observedsample.
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Strasbourg - ESO catalogue of galactic planetary nebulae. Part 1; Part 2
Not Available
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Statistical properties of winds in central stars of planetary nebulae
Results are presented of an investigation of 834 low-resolutionshort-wavelength primary spectra taken with the IUE satellite of 159planetary nebulae for the presence of stellar winds in the centralstars. It is found that about 60 percent of central stars have a stellarwind. The wind's existence is examined against the optical spectral typeof the star. Previous information is incorporated into an updated listof the edge velocities in the central stars having fast winds. Theyrange from 600 to 3500 km/s. A positive correlation between the edgevelocity of the stellar wind and the expansion velocity of the opticalnebula is found. This correlation is consistent with the multipleinteracting wind theory in the adiabatic case.
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Winds in Central Stars of Planetary Nebulae
Not Available
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Mis-classified planetary nebulae
VLA Radio observations of a number of suspected planetary nebulae arepresented. Based on the morphology of the source, and on the IRAS farinfrared colors, some of these are shown to be compact HII regions. Mostof the other sources show no radio emission down to a level of 1 mJy andare either emission line stars, reflection nebulae, or galaxies. Theradio images of the resolved sources are presented, along with adiscussion of the detected sources. Also a brief description of some ofthe sources is given.
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An optical spiral arm beyond the Perseus arm
In the second galactic quadrant, optical spiral arm tracers have beencollected in a systematic literature search. A uniform reduction of thedata led to the detection of a distinct structure (probably a spiralarm) beyond the Perseus arm that is separated by a statisticallysignificant gap from the latter.
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Misclassified planetary nebulae
In this paper 266 objects taken from catalogs and lists of planetarynebulas are discussed. Opinions are based on observations given in theliterature, on the vast photometric information collected by the IRASsatellite, plus on the observations from the ongoing project of aspectroscopic survey of all planetary nebulas. Of the objects, 199 aredefinitely rejected as planetary nebulas, 63 others are possibly notplanetary nebulas.
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The nature of Weinberger-12
From IUE spectra of its central star, the authors conclude thatWeinberger-12 is a small H II region, and not a planetary nebula. Thestar is substantially reddened with a color excess of 0m.75,is most likely a B0.5 - B1 giant or subgiant about three kpc distant,and possibly belongs to the Cas OB2 association.
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Index and cross-identification of planetary nebulae
The index of 86 discovery lists of planetary nebulae contains all theknown planetary nebulae in the Galaxy, including the probable, possibleand misclassified objects. A cross-identification gives all the names ofthe 1518 PN ordered by increasing galactic longitude.
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Catalogue of the central stars of true and possible planetary nebulae
Not Available
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Radio observations of planetary nebulae at 6 CM
This paper discusses radio investigations of relatively new planetarynebulas. Thirty-nine planetary nebulas discovered since 1966 areexamined at 6 cm with the German 100 m radiotelescope. Thirty-five ofthe objects are taken from Weinberger's (1977) compilation, and fourobjects are faint extended planetary nebulas recently found at theInstitute for Astronomy in Innsbruck. A list of the radio observationsis presented, and nineteen of the planetary nebulas were detected.Emphasis is placed on two objects which correspond to CRL 618 and K 648.
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New and misclassified planetary nebulae
The paper tabulates the designations, names, coordinates, discoverydates and discoverers of 226 new objects which have been classified asplanetary nebulae since the publication of the Catalogue of GalacticPlanetary Nebulae in 1966. A group of eight objects called possibleproto-planetary nebulae is also added. These objects may be in an earlystage of evolution of a planetary nebulae or even in the stage of apossible planetary nebulae progenitor. A total of 34 objects previouslymisclassified as planetary nebulae is appended.
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A list of possible, probable, and true planetary nebulae detected since 1966
A total of 335 objects designated as possible, probable, or truegalactic planetary nebulae since the closing of the Perek and Kohoutek(1967) catalog are listed with names, designations, the best availableequatorial coordinates, galactic coordinates, apparent dimensions, andindications of observations in the optical, infrared, and radio ranges.Forty-four candidates which subsequently turned out to be presumablynonplanetaries are also given. Six possible planetaries are listed forthe first time.
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New planetary nebulae of low surface brightness.
Abstract image available at:http://adsabs.harvard.edu/abs/1977A&AS...30..343W
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INHABITED SKY
