Structures, spectral indexes, and optical identifications of radio sources selected from the B3 catalogue

Vigotti, M.; Grueff, G.; Perley, R. A.; Clark, B. G.; Bridle, A. H.

doi:10.1086/115153

Cited by 79 publications

(106 citation statements)

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“…Lahulla et al (1991). The old red magnitude is a visual estimate from the Palomar Sky Survey Prints (Vigotti et al 1989 Vigotti (priv. comm.).…”

Section: Discussionmentioning

confidence: 99%

“…The B3-VLA CSS sample (Fanti et al 2001, Paper I) is a complete subset of the B3-VLA catalog (Vigotti et al 1989). It counts 87 radio sources with angular size less than a few arcsecs, corresponding to a linear size < ∼ 20 kpc (for H 0 = 100 km s −1 , q 0 = 0.5, values used in Paper I), divided into two different flux density bins: 0.8-1.6 Jy and ≥1.6 Jy at 408 MHz.…”

Section: The B3-vla Css Samplementioning

confidence: 99%

“…: a) all quasar candidates were observed spectroscopically and their redshifts measured (Vigotti et al 1997); b) for galaxies visible on the POSS (m R < ∼ 20.5), photometric redshifts (up to ≈0.5) were determined from the apparent red magnitude as described in Vigotti et al (1989); c) ≈75% of the sources (referred to as "empty fields" or "E" sources) had no optical identification.…”

Section: The B3-vla Css Samplementioning

confidence: 99%

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The B3-VLA CSS sample

Fanti

Zanichelli

et al. 2011

A&A

120

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Context. Compact steep-spectrum radio sources and giga-hertz peaked spectrum radio sources (CSS/GPS) are generally considered to be mostly young radio sources. In recent years we studied at many wavelengths a sample of these objects selected from the B3-VLA catalog: the B3-VLA CSS sample. Only ≈60% of the sources were optically identified. Aims. We aim to increase the number of optical identifications and study the properties of the host galaxies of young radio sources. Methods. We cross-correlated the CSS B3-VLA sample with the Sloan Digital Sky Survey (SDSS), DR7, and complemented the SDSS photometry with available GALEX (DR 4/5 and 6) and near-IR data from UKIRT and 2MASS. Results. We obtained new identifications and photometric redshifts for eight faint galaxies and for one quasar and two quasar candidates. Overall we have 27 galaxies with SDSS photometry in five bands, for which we derived the ultraviolet-optical spectral energy distribution (UV-O-SED). We extended our investigation to additional CSS/GPS selected from the literature. Most of the galaxies show an excess of ultra-violet (UV) radiation compared with the UV-O-SED of local radio-quiet ellipticals. We found a strong dependence of the UV excess on redshift and analyzed it assuming that it is generated either from the nucleus (hidden quasar) or from a young stellar population (YSP). We also compare the UV-O-SEDs of our CSS/GPS sources with those of a selection of large size (LSO) powerful radio sources from the literature. Conclusions. If the major process of the UV excess is caused by a YSP, our conclusion is that it is the result of the merger process that also triggered the onset of the radio source with some time delay. We do not see evidence for a major contribution from a YSP triggered by the radio sources itself.

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“…Lahulla et al (1991). The old red magnitude is a visual estimate from the Palomar Sky Survey Prints (Vigotti et al 1989 Vigotti (priv. comm.).…”

Section: Discussionmentioning

confidence: 99%

Section: The B3-vla Css Samplementioning

confidence: 99%

Section: The B3-vla Css Samplementioning

confidence: 99%

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The B3-VLA CSS sample

Fanti

Zanichelli

et al. 2011

A&A

120

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“…Starting from the 1049 sources in the B3/VLA sample (Vigotti et al 1989), Fanti et al (2001) have searched for Compact Steep Spectrum sources, imposing selection criteria on both compactness (LS < 20h −1 kpc) and spectral index (α 10 1.5 > 0.5). A further selection was applied on the low frequency flux density (S 0.4 GHz > 0.8 Jy), providing a final sample of 87 sources.…”

Section: The B3/vla Css Samplementioning

confidence: 99%

Samples and statistics of CSS and GPS sources

Giroletti

Polatidis

2009

Astron Nachr

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The dates of receipt and acceptance should be inserted later Several samples have been proposed in the last years in order to study the properties of intrinsically small sources. In this paper, we review the properties of the main samples that are currently available, both selected on the basis of spectral index and of morphology. As a result of the work in this area, large numbers of intrinsically small sources have been found. We summarize the present status of hot spot advance measurements, listing 18 sources with available VLBI data. The mean hot spot separation velocity is vsep = (0.19 ± 0.11)h −1 c and the kinematic ages span the range from 20 to 3000 years. Finally, we present a brief outlook on the use of future instrumentation in order to improve our understanding of radio source evolution. Prospects for VSOP2, e-VLA, e-MERLIN, LOFAR, ALMA, and Fermi are suggested.

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“…From the B3, down to the catalogue limit of 0.1 Jy, Vigotti et al (1989) selected five complete subsamples separated by equal increments in logarithmic flux density and containing approximately the same number of sources, through the choice of different declination limits for each subsample. Furthermore, the right ascention range was restricted to exclude sky areas at low galactic latitude (R.A. 23 h 00 m − 03 h 00 m and 07 h 00 m − 15 h 00 m ).…”

Section: The Radio Samplementioning

confidence: 99%

The B3-VLA quasar sample

Vigotti

Vettolani

Merighi

et al. 1997

Astron. Astrophys. Suppl. Ser.

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Abstract. A new low frequency radio selected Sample of 125 Quasars complete down to 100 mJy at 408 MHz is presented in this paper. The sample is a part of the B3-VLA sample: 1050 radiosources selected from the B3 catalogue at 408 MHz and observed at the VLA (1465 MHz, C and A configurations). Out of the 352 sources, identified on the POSS-I down to m r ∼ 20.0, 172 are quasar candidates. In this paper we give the final assessment of the quasar sample from spectroscopic observations of the candidates. The final complete quasar sample consists of 125 objects. Furthermore 3 Bl Lac objects have been identified and two Bl Lac candidates.

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Structures, spectral indexes, and optical identifications of radio sources selected from the B3 catalogue

Cited by 79 publications

References 1 publication

The B3-VLA CSS sample

The B3-VLA CSS sample

Samples and statistics of CSS and GPS sources

The B3-VLA quasar sample

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