The Case low-dispersion northern sky survey. I

Pesch, Peter; Sanduleak, N.

doi:10.1086/190843

Cited by 65 publications

(37 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The coordinates for the Case catalog objects were obtained by the Catalog's authors from the objective-prism plates of Case survey. The estimated accuracy (rms) for α lies within ± 3 , for δ within ± 6 (Pesch & Sanduleak 1983). For Markarian galaxies the errors of coordinates usually lie inside 2 .…”

Section: The Main Observational Parametersmentioning

confidence: 68%

“…The first is the Second Byurakan Survey (SBS), in which about 1500 galaxies were selected in the area of 1000 square degrees (Markarian et al 1983;Stepanian et al 1993) with a magnitude limit of about m pg = 18. m 0. The Case Low-Dispersion Northern Sky Survey is another large survey which combines both selection criteria (Pesch & Sanduleak 1983;Sanduleak & Pesch 1984;Stephenson et al 1992;Pesch et al 1995). The Case survey includes also the lists of HII-regions in other galaxies, blue and carbon stars.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spectral survey of Case emission–line galaxies with the 6 m Russian telescope

Ugryumov

Pustilnik

Lipovetsky

et al. 1998

Astron. Astrophys. Suppl. Ser.

View full text Add to dashboard Cite

Abstract. The results of the follow-up spectroscopy of 178 emission-line galaxy (ELG) candidates from the Case objective-prism survey and nine Markarian galaxies with the 6 m telescope are described. Only the candidates classified in the Case survey as those with emission lines were observed with the aim to form a statistical sample of blue compact galaxies (BCGs) with strong emission lines in the zone α = 8h ÷ 16 h , and δ = +29• ÷ +38• . We present the redshifts, equivalent widths and flux ratios for the strongest lines and the spectrum type for most of the galaxies with detected emission lines. A significant fraction (≈ 23%) of the observed Case galaxies do not show emission lines in blue. Preliminary analysis of the data is presented and the properties of the observed ELGs are compared with those of other known samples 1 .

show abstract

Section: The Main Observational Parametersmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Spectral survey of Case emission–line galaxies with the 6 m Russian telescope

Ugryumov

Pustilnik

Lipovetsky

et al. 1998

Astron. Astrophys. Suppl. Ser.

View full text Add to dashboard Cite

show abstract

“…The classification of galaxies as A/SF adopted here is robust. Not only do the samples contain well-known active galaxies, such as Mrk 268 and Mrk 358, or well-known starburst galaxies, such as Mrk 171 and Mrk 297, but many other galaxies have obtained independent A/SF classification; e.g., KUG 1259+279 is a star-forming galaxy identified in the Case lowdispersion northern sky survey (e.g., Pesch & Sanduleak 1983) and has a alternative identification as CG 0960. The same is true for KUG 1217+314 = CG 0172, or for KUG 1255+283 = CG 0934, etc.…”

Section: Analysis and Discussionmentioning

confidence: 99%

Active and Star-forming Galaxies and Their Supernovae

Петросян¹,

Navasardyan²,

McLean³

et al. 2005

Astron J

View full text Add to dashboard Cite

To investigate the extent to which nuclear starbursts or other nuclear activity may be connected with enhanced star formation activity in the host galaxy, we perform a statistical investigation of supernovae (SNe) discovered in host galaxies from four samples: the Markarian galaxies sample, the Second Byurakan Survey (SBS) sample, the north Galactic pole ( NGP) sample of active or star-forming galaxies, and the NGP sample of normal galaxies. Forty-seven SNe in 41 Mrk galaxies, 10 SNe in six SBS galaxies, 29 SNe in 26 NGP active or star-forming galaxies, and 29 SNe in 26 NGP normal galaxies have been studied. We find that the rate of SNe, particularly core-collapse ( Types Ib/c and II) SNe, is higher in active or star-forming galaxies in comparison with normal galaxies. Active or star-forming host galaxies of SNe are generally of later morphological type and have lower luminosity and smaller linear size than normal host galaxies of SNe. The radial distribution of SNe in active and star-forming galaxies shows a higher concentration toward the center of the active host galaxy than is the case for normal host galaxies, and this effect is more pronounced for core-collapse SNe. Ib/c-type SNe have been discovered only in active and star-forming galaxies of our samples. About 78% of these SNe are associated with H ii regions or are located very close to the nuclear regions of these active galaxies, which are in turn hosting AGNs or starburst nuclei. Besides these new results, our study also supports the conclusions of several other earlier papers. We find that Type Ia SNe occur in all galaxy types, whereas core-collapse SNe of Types Ib/c and II are found only in spiral and irregular galaxies. The radial distribution of Type Ib SNe in their host galaxies is more centrally concentrated than that of Type II and Ia SNe. The radial distances of Types Ib/c and II SNe, from the nuclei of their host galaxies, is larger for barred spiral hosts. Core-collapse SNe are concentrated in spiral arms and are often close to or in the H ii regions, whereas Type Ia SNe show only a loose association with spiral arms and no clear association with H ii regions.

show abstract

“…6 in each coordinate; "*" indicates objects with larger errors due to their location near one edge of the Schmidt plate (Véron-Cetty & Véron 1996). References for finding charts: (1) Andreasian & Alloin (1994), (2) Arp (1966), (3) Bowen et al (1994), (4) Carballo et al (1992), (5) de Grijp et al (1987), (6) González Delgado & Pérez (1996), (7) Duc et al (1997), (8) Kazarian (1979), (9) Keel (1996), (10) Markarian & Lipovetski (1971), (11) Markarian & Lipovetski (1973), (12) Markarian & Lipovetski (1974), (13) Markarian et al (1979a), (14) Markarian et al (1979b), (15) Markarian & Stepanian (1983), (16) Mazzarella & Boroson (1993), (17) Olsen (1970), (18) Pesch & Sanduleak (1983), (19) Rubin et al (1975), (20) Sandage & Bedke (1994), (21) Takase & Miyauchi-Isobe (1986), (22) Takase & Miyauchi-Isobe (1990), (23) Vogel et al (1993), (24) Grijp et al (1992) on the basis of its emissionline ratios. We discussed this object in Paper I, giving it the wrong name (MCG −02.05.022); we suggested, on the basis of a blue spectrum, that it was "composite".…”

Section: Notes On Individual Objectsmentioning

confidence: 99%

AGNs with composite spectra

Gonçalves

Véron-Cetty

Véron

1999

Astron. Astrophys. Suppl. Ser.

View full text Add to dashboard Cite

Abstract. In a previous paper (Véron et al. 1997) we presented medium resolution (3.4Å F W HM) spectroscopic observations of 15 "transition objects", selected for having an ambiguous location in the Veilleux & Osterbrock (1987) diagnostic diagrams, and showed that most of them were in fact "composite", this being due to the simultaneous presence on the slit of both a Seyfert or Liner nucleus and a H ii region. Here, we report new spectroscopic observations of 53 emission-line galaxies with a "transition" spectrum, bringing up to 61 the total number of observed objects in an unbiased sample of 88 "transition objects". Almost all of the observed galaxies have a "composite" nature, confirming the finding that true "transition" spectra may not exist at all.By eliminating "composite objects" from the diagnostic diagrams, a clear separation between the different classes of nuclear emission-line regions (Seyfert 2s, Liners and H ii regions) becomes apparent; by restricting the volume occupied by the different line-emitting regions in the 3-dimensional diagnostic diagrams, we are also restricting the range of possible physical parameters in these regions. There seems to be no continuity between Seyfert 2s and Liners, the two classes occupying distinct volumes in the 3-dimensional space defined by λ5007/Hβ, λ6583/Hα, and λ6300/Hα.

show abstract

The Case low-dispersion northern sky survey. I

Cited by 65 publications

References 0 publications

Spectral survey of Case emission–line galaxies with the 6 m Russian telescope

Spectral survey of Case emission–line galaxies with the 6 m Russian telescope

Active and Star-forming Galaxies and Their Supernovae

AGNs with composite spectra

Contact Info

Product

Resources

About