Surface photometry of emission-line galaxies in low density 
regions

Vennik, J.; Hopp, U.; Popescu, Cristina

doi:10.1051/aas:2000160

Cited by 23 publications

(28 citation statements)

References 22 publications

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“…Previous optical studies (e.g. LT86, P96a, Telles et al 1997;Marlowe et al 1997;Salzer & Norton 1999;Vennik et al 2000;Cairós et al 2001aCairós et al , 2001bMakarova et al 2002) of BCDs suggest that those systems mostly show no strong deviations from an exponential law over their outer LSB SBPs. Also if small deviations from an exponential law which are hardly detectable in current data should exist, a med gives a robust approximation by fixing the LSB profile shape.…”

Section: The Sérsic Law Vs the Med For Studies Of Type V Sbpsmentioning

confidence: 89%

“…Binggeli & Cameron 1991;Cellone et al 1994;Young & Currie 1994, and Vennik et al (2000) deduce a fraction of >10% for the SBPs of late-type dwarf galaxies falling into this category. In fact, a casual inspection of the sample of Patterson & Thuan (1996), Makarova et al (1998), Vennik et al (2000) and van Zee (2000) (Duc et al 1999) and Kar 50 (Davidge 2002). Following the nomenclature of Binggeli & Cameron (1991) we shall henceforth refer to this type of SBPs as to type V.…”

Section: Profile Decompositionmentioning

confidence: 93%

“…LT86, Kunth et al 1988, P96a, Telles et al 1997Marlowe et al 1997;Doublier et al 1997Doublier et al , 1999Salzer & Norton 1999;Vennik et al 2000;Cairós et al 2001a,b;Makarova et al 2002). In optical wavelengths, extended stellar and gaseous starburst emission overshines the LSB component out to a galactocentric radius of typically ∼2 exponential scale lengths.…”

Section: Introductionmentioning

confidence: 99%

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New insights to the photometric structure of Blue Compact Dwarf galaxies from deep Near-Infrared studies

Noeske

Papaderos

Cairós

et al. 2003

A&A

102

158

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Abstract.We have analyzed deep Near Infrared (NIR) broad band images for a sample of Blue Compact Dwarf Galaxies (BCDs), observed with the ESO NTT and Calar Alto 3.6 m telescopes. The data presented here allows for the detection and quantitative study of the extended stellar low-surface brightness (LSB) host galaxy in all sample BCDs. NIR surface brightness profiles (SBPs) of the LSB host galaxies agree at large galactocentric radii with those from optical studies, showing also an exponential intensity decrease and compatible scale lengths. At small to intermediate radii (within 1-3 exponential scale lengths), however, the NIR data reveals for more than one half of our sample BCDs evidence for a significant flattening of the exponential profile of the LSB component. Such profiles (type V SBPs, Binggeli & Cameron 1991) have rarely been detected in the LSB component of BCDs at optical wavelengths, where the relative flux contribution of the starburst, being stronger than in the NIR, can readily hide a possible central intensity depression in the underlying LSB host. The structural properties, frequency and physical origin of type V LSB profiles in BCDs and dwarf galaxies in general have not yet been subject to systematic studies. Nevertheless, the occurrence of such profiles in an appreciable fraction of BCDs would impose important new observational constraints to the radial mass distribution of the stellar LSB component, as well as to the photometric fading of these systems after the termination of star-forming activities. We test the suitability of two empirical fitting functions, a modified exponential distribution (Papaderos et al. 1996a) and the Sérsic law, for the systematization of the structural properties of BCD host galaxies which show a type V intensity distribution. Either function has been found to satisfactorily fit a type V distribution. However, it is argued that the practical applicability of Sérsic fits to the LSB emission of BCDs is limited by the extreme sensitivity of the achieved solutions to, e.g., small uncertainties in the sky subtraction and SBP derivation. We find that most of the sample BCDs show in their stellar LSB host galaxy optical-NIR colors indicative of an evolved stellar population with subsolar metallicity. Unsharp-masked NIR maps reveal numerous morphological details and indicate in some cases, in combination with optical data, appreciable non-uniform dust absorption on a spatial scale as large as ∼1 kpc.

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Section: The Sérsic Law Vs the Med For Studies Of Type V Sbpsmentioning

confidence: 89%

Section: Profile Decompositionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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New insights to the photometric structure of Blue Compact Dwarf galaxies from deep Near-Infrared studies

Noeske

Papaderos

Cairós

et al. 2003

A&A

102

158

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“…Popescu et al (1999) reported no conspicuous difference in present and past SF activity for ELGs in field and void environments. On the other hand, Vennik et al (2000) found that the low surface brightness hosts of non-isolated ELGs tend to be more compact than those of isolated ones.…”

Section: Introductionmentioning

confidence: 95%

On faint companions in the close environment of star-forming dwarf galaxies

Noeske

Iglésias-Páramo

Vı́lchez

et al. 2001

A&A

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Abstract.We have searched for companion galaxies in the close environment of 98 star-forming dwarf galaxies (SFDGs) from field and low density environments, using the NASA Extragalactic Database. Most of the companions are dwarf galaxies which due to observational selection effects were previously disregarded in environmental studies of SFDGs. A subsample at low redshift, cz < 2000 km s −1 , was chosen to partially eliminate the observational bias against distant dwarf companions. We find companion candidates for approximately 30% of the objects within a projected linear separation sp < 100 kpc and a redshift difference ∆cz < 500 km s −1 . The limited completeness of the available data sets, together with the non-negligible frequency of H i clouds in the vicinity of SFDGs indicated by recent radio surveys, suggest that a considerably larger fraction of these galaxies may be accompanied by low-mass systems. This casts doubt on the hypothesis that the majority of them can be considered truly isolated. The velocity differences between companion candidates and sample SFDGs amount typically to < ∼ 250 km s −1 , and show a rising distribution towards lower ∆cz. This is similarly found for dwarf satellites of spiral galaxies, suggesting a physical association between the companion candidates and the sample SFDGs. SFDGs with a close companion do not show significant differences in their Hβ equivalent widths and B −V colours as compared to isolated ones. However, the available data do not allow us to rule out that interactions with close dwarf companions can influence the star formation activity in SFDGs.

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“…Objects referred to have precise B-magnitude in Vennik, et al (2000). We do not list them here for the sake of homogeneity.…”

Section: Emission-line Galaxiesmentioning

confidence: 99%

The Hamburg/SAO survey for emission-line galaxies

Ugryumov

Engels

Kniazev

et al. 2001

A&A

Self Cite

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Abstract. We present the fifth list with results of the Hamburg/SAO Survey for Emission-Line Galaxies (HSS therein, SAO -Special Astrophysical Observatory, Russia). The list is a result of follow-up spectroscopy conducted with the 2.2 m CAHA and 4 m Kitt Peak telescopes in 1999. The data of this snap-shot spectroscopy survey confirmed 166 emission-line objects out of 209 observed candidates and allowed their quantitative spectral classification and redshift determination. We could classify 98 emission-line objects as BCG/Hii galaxies or probable BCGs, 5 -as QSOs, 3 -as Seyfert galaxies, 2 -as super-associations in subluminous spiral galaxies. 25 low-excitation objects were classified as starburst nuclei (SBN), 24 as dwarf amorphous nuclei starburst galaxies (DANS) and 3 as LINERs. Due to low signal-to-noise ratio we could not classify 6 ELGs. Furthermore, for another 4 galaxies we did not detect any significant emission lines. For 131 emission-line galaxies, the redshifts and/or line intensities are determined for the first time. For the remaining 30 previously known ELGs we give either improved data of the line intensities or some independent measurements.

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Surface photometry of emission-line galaxies in low density regions

Cited by 23 publications

References 22 publications

New insights to the photometric structure of Blue Compact Dwarf galaxies from deep Near-Infrared studies

New insights to the photometric structure of Blue Compact Dwarf galaxies from deep Near-Infrared studies

On faint companions in the close environment of star-forming dwarf galaxies

The Hamburg/SAO survey for emission-line galaxies

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