The VVDS-VLA deep field II. Optical and near infrared identifications of VLA S1.4GHz > 80 μJy sources in the VIMOS VLT deep survey VVDS-02h field

P. Ciliegi, G. Zamorani, M. Bondi, L. Pozzetti, M. Bolzonella, L. Gregorini, B. Garilli, A. Iovino, H. J. McCracken, Y. Mellier, M. Radovich, H. R. De Ruiter, P. Parma, D. Bottini, V. Le Brun, O. Le Fèvre, D. Maccagni, J. P. Picat, R. Scaramella, M. ScodeggioL. Tresse, G. Vettolani, A. Zanichelli, C. Adami, M. Arnaboldi, S. Arnouts, S. Bardelli, A. Cappi, S. Charlot, T. Contini, S. Foucaud, P. Franzetti, L. Guzzo, O. Ilbert, B. Marano, C. Marinoni, G. Mathez, A. Mazure, B. Meneux, R. Merighi, P. Merluzzi, S. Paltani, A. Pollo, E. Zucca, A. Bongiorno, G. Busarello, I. Gavignaud, R. Pellò, V. Ripepi, D. Rizzo

Resultado de la investigación: Article

45 Citas (Scopus)

Resumen

In this paper we present the optical and near-infrared identifications of the 1054 radio sources detected in the 20 cm deep radio survey down to a 5σ flux limit of ∼80 μJy obtained with the VLA in the VIMOS VLT Deep Survey VVDS-02h deep field. Using U, B, V, R, I and K data, with limiting magnitudes of UAB ∼ 25.4, BAB ∼ 26.5, V AB ∼ 26.2, RAB ∼ 25.9 IAB ∼ 25.0, JAB ∼ 24.2, KAB ∼ 23.9 (50% completeness) we identified 718 radio sources (∼74% of the whole sample). The photometric redshift analysis shows that, in each magnitude bin, the radio sample has a higher median photometric redshift than the whole optical sample, while the median (V - I)AB color of the radio sources is redder than the median color of the whole optical sample. These results suggest that radio detection is preferentially selecting galaxies with higher intrinsic optical luminosity. From the analysis of the optical properties of the radio sources as function of the radio flux, we found that while about 35% of the radio sources are optically unidentified in the higher radio flux bin (S > 1.0 mJy), the percentage of unidentified sources decreases to about 25% in the faintest bins (S < 0.5 mJy). The median IAB magnitude for the total sample of radio sources, i.e. including also the unidentified ones, is brighter in the faintest radio bins than in the bin with higher radio flux. This suggests that most of the faintest radio sources are likely to be associated to relatively lower radio luminosity objects at relatively modest redshift, rather than radio-powerful, AGN type objects at high redshift. Using a classification in early-type and late-type galaxies based on the (B - I)AB color and the photometric redshift, we found that the majority of the radio sources below ∼0.15 mJy are indeed late-type star forming galaxies. Finally, the radio sources without optical counterpart in our deep imaging have a median radio flux of 0.15 mJy, equal to that of identified sources. Given the very faint optical limits, these unidentified radio sources probably contain a significant fraction of obscured and/or high redshift galaxies.

Idioma originalEnglish
Páginas (desde-hasta)879-891
Número de páginas13
PublicaciónAstronomy and Astrophysics
Volumen441
N.º3
DOI
EstadoPublished - 1 oct 2005

Huella dactilar

near infrared
radio
galaxies
color
luminosity
completeness
optical properties
stars
optical property

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Ciliegi, P. ; Zamorani, G. ; Bondi, M. ; Pozzetti, L. ; Bolzonella, M. ; Gregorini, L. ; Garilli, B. ; Iovino, A. ; McCracken, H. J. ; Mellier, Y. ; Radovich, M. ; De Ruiter, H. R. ; Parma, P. ; Bottini, D. ; Le Brun, V. ; Le Fèvre, O. ; Maccagni, D. ; Picat, J. P. ; Scaramella, R. ; Scodeggio, M. ; Tresse, L. ; Vettolani, G. ; Zanichelli, A. ; Adami, C. ; Arnaboldi, M. ; Arnouts, S. ; Bardelli, S. ; Cappi, A. ; Charlot, S. ; Contini, T. ; Foucaud, S. ; Franzetti, P. ; Guzzo, L. ; Ilbert, O. ; Marano, B. ; Marinoni, C. ; Mathez, G. ; Mazure, A. ; Meneux, B. ; Merighi, R. ; Merluzzi, P. ; Paltani, S. ; Pollo, A. ; Zucca, E. ; Bongiorno, A. ; Busarello, G. ; Gavignaud, I. ; Pellò, R. ; Ripepi, V. ; Rizzo, D. / The VVDS-VLA deep field II. Optical and near infrared identifications of VLA S1.4GHz > 80 μJy sources in the VIMOS VLT deep survey VVDS-02h field. En: Astronomy and Astrophysics. 2005 ; Vol. 441, N.º 3. pp. 879-891.
@article{4efcb1bfd66547fd8b5d39f524851557,
title = "The VVDS-VLA deep field II. Optical and near infrared identifications of VLA S1.4GHz > 80 μJy sources in the VIMOS VLT deep survey VVDS-02h field",
abstract = "In this paper we present the optical and near-infrared identifications of the 1054 radio sources detected in the 20 cm deep radio survey down to a 5σ flux limit of ∼80 μJy obtained with the VLA in the VIMOS VLT Deep Survey VVDS-02h deep field. Using U, B, V, R, I and K data, with limiting magnitudes of UAB ∼ 25.4, BAB ∼ 26.5, V AB ∼ 26.2, RAB ∼ 25.9 IAB ∼ 25.0, JAB ∼ 24.2, KAB ∼ 23.9 (50{\%} completeness) we identified 718 radio sources (∼74{\%} of the whole sample). The photometric redshift analysis shows that, in each magnitude bin, the radio sample has a higher median photometric redshift than the whole optical sample, while the median (V - I)AB color of the radio sources is redder than the median color of the whole optical sample. These results suggest that radio detection is preferentially selecting galaxies with higher intrinsic optical luminosity. From the analysis of the optical properties of the radio sources as function of the radio flux, we found that while about 35{\%} of the radio sources are optically unidentified in the higher radio flux bin (S > 1.0 mJy), the percentage of unidentified sources decreases to about 25{\%} in the faintest bins (S < 0.5 mJy). The median IAB magnitude for the total sample of radio sources, i.e. including also the unidentified ones, is brighter in the faintest radio bins than in the bin with higher radio flux. This suggests that most of the faintest radio sources are likely to be associated to relatively lower radio luminosity objects at relatively modest redshift, rather than radio-powerful, AGN type objects at high redshift. Using a classification in early-type and late-type galaxies based on the (B - I)AB color and the photometric redshift, we found that the majority of the radio sources below ∼0.15 mJy are indeed late-type star forming galaxies. Finally, the radio sources without optical counterpart in our deep imaging have a median radio flux of 0.15 mJy, equal to that of identified sources. Given the very faint optical limits, these unidentified radio sources probably contain a significant fraction of obscured and/or high redshift galaxies.",
keywords = "Cosmology: observations, Galaxies: general, Galaxies: starburst, Radio continuum: galaxies",
author = "P. Ciliegi and G. Zamorani and M. Bondi and L. Pozzetti and M. Bolzonella and L. Gregorini and B. Garilli and A. Iovino and McCracken, {H. J.} and Y. Mellier and M. Radovich and {De Ruiter}, {H. R.} and P. Parma and D. Bottini and {Le Brun}, V. and {Le F{\`e}vre}, O. and D. Maccagni and Picat, {J. P.} and R. Scaramella and M. Scodeggio and L. Tresse and G. Vettolani and A. Zanichelli and C. Adami and M. Arnaboldi and S. Arnouts and S. Bardelli and A. Cappi and S. Charlot and T. Contini and S. Foucaud and P. Franzetti and L. Guzzo and O. Ilbert and B. Marano and C. Marinoni and G. Mathez and A. Mazure and B. Meneux and R. Merighi and P. Merluzzi and S. Paltani and A. Pollo and E. Zucca and A. Bongiorno and G. Busarello and I. Gavignaud and R. Pell{\`o} and V. Ripepi and D. Rizzo",
year = "2005",
month = "10",
day = "1",
doi = "10.1051/0004-6361:20042204",
language = "English",
volume = "441",
pages = "879--891",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",
number = "3",

}

Ciliegi, P, Zamorani, G, Bondi, M, Pozzetti, L, Bolzonella, M, Gregorini, L, Garilli, B, Iovino, A, McCracken, HJ, Mellier, Y, Radovich, M, De Ruiter, HR, Parma, P, Bottini, D, Le Brun, V, Le Fèvre, O, Maccagni, D, Picat, JP, Scaramella, R, Scodeggio, M, Tresse, L, Vettolani, G, Zanichelli, A, Adami, C, Arnaboldi, M, Arnouts, S, Bardelli, S, Cappi, A, Charlot, S, Contini, T, Foucaud, S, Franzetti, P, Guzzo, L, Ilbert, O, Marano, B, Marinoni, C, Mathez, G, Mazure, A, Meneux, B, Merighi, R, Merluzzi, P, Paltani, S, Pollo, A, Zucca, E, Bongiorno, A, Busarello, G, Gavignaud, I, Pellò, R, Ripepi, V & Rizzo, D 2005, 'The VVDS-VLA deep field II. Optical and near infrared identifications of VLA S1.4GHz > 80 μJy sources in the VIMOS VLT deep survey VVDS-02h field', Astronomy and Astrophysics, vol. 441, n.º 3, pp. 879-891. https://doi.org/10.1051/0004-6361:20042204

The VVDS-VLA deep field II. Optical and near infrared identifications of VLA S1.4GHz > 80 μJy sources in the VIMOS VLT deep survey VVDS-02h field. / Ciliegi, P.; Zamorani, G.; Bondi, M.; Pozzetti, L.; Bolzonella, M.; Gregorini, L.; Garilli, B.; Iovino, A.; McCracken, H. J.; Mellier, Y.; Radovich, M.; De Ruiter, H. R.; Parma, P.; Bottini, D.; Le Brun, V.; Le Fèvre, O.; Maccagni, D.; Picat, J. P.; Scaramella, R.; Scodeggio, M.; Tresse, L.; Vettolani, G.; Zanichelli, A.; Adami, C.; Arnaboldi, M.; Arnouts, S.; Bardelli, S.; Cappi, A.; Charlot, S.; Contini, T.; Foucaud, S.; Franzetti, P.; Guzzo, L.; Ilbert, O.; Marano, B.; Marinoni, C.; Mathez, G.; Mazure, A.; Meneux, B.; Merighi, R.; Merluzzi, P.; Paltani, S.; Pollo, A.; Zucca, E.; Bongiorno, A.; Busarello, G.; Gavignaud, I.; Pellò, R.; Ripepi, V.; Rizzo, D.

En: Astronomy and Astrophysics, Vol. 441, N.º 3, 01.10.2005, p. 879-891.

Resultado de la investigación: Article

TY - JOUR

T1 - The VVDS-VLA deep field II. Optical and near infrared identifications of VLA S1.4GHz > 80 μJy sources in the VIMOS VLT deep survey VVDS-02h field

AU - Ciliegi, P.

AU - Zamorani, G.

AU - Bondi, M.

AU - Pozzetti, L.

AU - Bolzonella, M.

AU - Gregorini, L.

AU - Garilli, B.

AU - Iovino, A.

AU - McCracken, H. J.

AU - Mellier, Y.

AU - Radovich, M.

AU - De Ruiter, H. R.

AU - Parma, P.

AU - Bottini, D.

AU - Le Brun, V.

AU - Le Fèvre, O.

AU - Maccagni, D.

AU - Picat, J. P.

AU - Scaramella, R.

AU - Scodeggio, M.

AU - Tresse, L.

AU - Vettolani, G.

AU - Zanichelli, A.

AU - Adami, C.

AU - Arnaboldi, M.

AU - Arnouts, S.

AU - Bardelli, S.

AU - Cappi, A.

AU - Charlot, S.

AU - Contini, T.

AU - Foucaud, S.

AU - Franzetti, P.

AU - Guzzo, L.

AU - Ilbert, O.

AU - Marano, B.

AU - Marinoni, C.

AU - Mathez, G.

AU - Mazure, A.

AU - Meneux, B.

AU - Merighi, R.

AU - Merluzzi, P.

AU - Paltani, S.

AU - Pollo, A.

AU - Zucca, E.

AU - Bongiorno, A.

AU - Busarello, G.

AU - Gavignaud, I.

AU - Pellò, R.

AU - Ripepi, V.

AU - Rizzo, D.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - In this paper we present the optical and near-infrared identifications of the 1054 radio sources detected in the 20 cm deep radio survey down to a 5σ flux limit of ∼80 μJy obtained with the VLA in the VIMOS VLT Deep Survey VVDS-02h deep field. Using U, B, V, R, I and K data, with limiting magnitudes of UAB ∼ 25.4, BAB ∼ 26.5, V AB ∼ 26.2, RAB ∼ 25.9 IAB ∼ 25.0, JAB ∼ 24.2, KAB ∼ 23.9 (50% completeness) we identified 718 radio sources (∼74% of the whole sample). The photometric redshift analysis shows that, in each magnitude bin, the radio sample has a higher median photometric redshift than the whole optical sample, while the median (V - I)AB color of the radio sources is redder than the median color of the whole optical sample. These results suggest that radio detection is preferentially selecting galaxies with higher intrinsic optical luminosity. From the analysis of the optical properties of the radio sources as function of the radio flux, we found that while about 35% of the radio sources are optically unidentified in the higher radio flux bin (S > 1.0 mJy), the percentage of unidentified sources decreases to about 25% in the faintest bins (S < 0.5 mJy). The median IAB magnitude for the total sample of radio sources, i.e. including also the unidentified ones, is brighter in the faintest radio bins than in the bin with higher radio flux. This suggests that most of the faintest radio sources are likely to be associated to relatively lower radio luminosity objects at relatively modest redshift, rather than radio-powerful, AGN type objects at high redshift. Using a classification in early-type and late-type galaxies based on the (B - I)AB color and the photometric redshift, we found that the majority of the radio sources below ∼0.15 mJy are indeed late-type star forming galaxies. Finally, the radio sources without optical counterpart in our deep imaging have a median radio flux of 0.15 mJy, equal to that of identified sources. Given the very faint optical limits, these unidentified radio sources probably contain a significant fraction of obscured and/or high redshift galaxies.

AB - In this paper we present the optical and near-infrared identifications of the 1054 radio sources detected in the 20 cm deep radio survey down to a 5σ flux limit of ∼80 μJy obtained with the VLA in the VIMOS VLT Deep Survey VVDS-02h deep field. Using U, B, V, R, I and K data, with limiting magnitudes of UAB ∼ 25.4, BAB ∼ 26.5, V AB ∼ 26.2, RAB ∼ 25.9 IAB ∼ 25.0, JAB ∼ 24.2, KAB ∼ 23.9 (50% completeness) we identified 718 radio sources (∼74% of the whole sample). The photometric redshift analysis shows that, in each magnitude bin, the radio sample has a higher median photometric redshift than the whole optical sample, while the median (V - I)AB color of the radio sources is redder than the median color of the whole optical sample. These results suggest that radio detection is preferentially selecting galaxies with higher intrinsic optical luminosity. From the analysis of the optical properties of the radio sources as function of the radio flux, we found that while about 35% of the radio sources are optically unidentified in the higher radio flux bin (S > 1.0 mJy), the percentage of unidentified sources decreases to about 25% in the faintest bins (S < 0.5 mJy). The median IAB magnitude for the total sample of radio sources, i.e. including also the unidentified ones, is brighter in the faintest radio bins than in the bin with higher radio flux. This suggests that most of the faintest radio sources are likely to be associated to relatively lower radio luminosity objects at relatively modest redshift, rather than radio-powerful, AGN type objects at high redshift. Using a classification in early-type and late-type galaxies based on the (B - I)AB color and the photometric redshift, we found that the majority of the radio sources below ∼0.15 mJy are indeed late-type star forming galaxies. Finally, the radio sources without optical counterpart in our deep imaging have a median radio flux of 0.15 mJy, equal to that of identified sources. Given the very faint optical limits, these unidentified radio sources probably contain a significant fraction of obscured and/or high redshift galaxies.

KW - Cosmology: observations

KW - Galaxies: general

KW - Galaxies: starburst

KW - Radio continuum: galaxies

UR - http://www.scopus.com/inward/record.url?scp=26844552094&partnerID=8YFLogxK

U2 - 10.1051/0004-6361:20042204

DO - 10.1051/0004-6361:20042204

M3 - Article

AN - SCOPUS:26844552094

VL - 441

SP - 879

EP - 891

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - 3

ER -