Optical validation and characterization of Planck PSZ1 sources at the Canary Islands observatories: I. First year of ITP13 observations

R. Barrena, A. Streblyanska, A. Ferragamo, J. A. Rubiño-Martín, A. Aguado-Barahona, D. Tramonte, R. T. Génova-Santos, A. Hempel, H. Lietzen, N. Aghanim, M. Arnaud, H. Böhringer, G. Chon, J. Democles, H. Dahle, M. Douspis, A. N. Lasenby, P. Mazzotta, J. B. Melin, E. PointecouteauG. W. Pratt, M. Rossetti, R. F.J. Van Der Burg

Resultado de la investigación: Article

4 Citas (Scopus)

Resumen

We have identified new clusters and characterized previously unknown Planck Sunyaev-Zeldovich (SZ) sources from the first Planck catalogue of SZ sources (PSZ1). The results presented here correspond to an optical follow-up observational programme developed during approximately one year (2014) at Roque de los Muchachos Observatory, using the 2.5 m Isaac Newton telescope, the 3.5 m Telescopio Nazionale Galileo, the 4.2 m William Herschel telescope and the 10.4 m Gran Telescopio Canarias. We have characterized 115 new PSZ1 sources using deep optical imaging and spectroscopy. We adopted robust criteria in order to consolidate the SZ counterparts by analysing the optical richness, the 2D galaxy distribution, and velocity dispersions of clusters. Confirmed counterparts are considered to be validated if they are rich structures, well aligned with the Planck PSZ1 coordinate and show relatively high velocity dispersion. Following this classification, we confirm 53 clusters, which means that 46% of this PSZ1 subsample has been validated and characterized with this technique. Sixty-Two SZ sources (54% of this PSZ1 subset) remain unconfirmed. In addition, we find that the fraction of unconfirmed clusters close to the galactic plane (at |b| < 25°) is greater than that at higher galactic latitudes (|b| > 25°), which indicates contamination produced by radio emission of galactic dust and gas clouds on these SZ detections. In fact, in the majority of the cases, we detect important galactic cirrus in the optical images, mainly in the SZ target located at low galactic latitudes, which supports this hypothesis.

Idioma originalEnglish
Número de artículoA42
PublicaciónAstronomy and Astrophysics
Volumen616
DOI
EstadoPublished - 1 ago 2018

Huella dactilar

Canary Islands
observatories
observatory
cirrus
spectroscopy
telescopes
radio
dust
radio emission
gas
newton
set theory
catalogs
contamination
galaxies
gases
programme
detection
distribution

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Barrena, R., Streblyanska, A., Ferragamo, A., Rubiño-Martín, J. A., Aguado-Barahona, A., Tramonte, D., ... Van Der Burg, R. F. J. (2018). Optical validation and characterization of Planck PSZ1 sources at the Canary Islands observatories: I. First year of ITP13 observations. Astronomy and Astrophysics, 616, [A42]. https://doi.org/10.1051/0004-6361/201732315
Barrena, R. ; Streblyanska, A. ; Ferragamo, A. ; Rubiño-Martín, J. A. ; Aguado-Barahona, A. ; Tramonte, D. ; Génova-Santos, R. T. ; Hempel, A. ; Lietzen, H. ; Aghanim, N. ; Arnaud, M. ; Böhringer, H. ; Chon, G. ; Democles, J. ; Dahle, H. ; Douspis, M. ; Lasenby, A. N. ; Mazzotta, P. ; Melin, J. B. ; Pointecouteau, E. ; Pratt, G. W. ; Rossetti, M. ; Van Der Burg, R. F.J. / Optical validation and characterization of Planck PSZ1 sources at the Canary Islands observatories : I. First year of ITP13 observations. En: Astronomy and Astrophysics. 2018 ; Vol. 616.
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abstract = "We have identified new clusters and characterized previously unknown Planck Sunyaev-Zeldovich (SZ) sources from the first Planck catalogue of SZ sources (PSZ1). The results presented here correspond to an optical follow-up observational programme developed during approximately one year (2014) at Roque de los Muchachos Observatory, using the 2.5 m Isaac Newton telescope, the 3.5 m Telescopio Nazionale Galileo, the 4.2 m William Herschel telescope and the 10.4 m Gran Telescopio Canarias. We have characterized 115 new PSZ1 sources using deep optical imaging and spectroscopy. We adopted robust criteria in order to consolidate the SZ counterparts by analysing the optical richness, the 2D galaxy distribution, and velocity dispersions of clusters. Confirmed counterparts are considered to be validated if they are rich structures, well aligned with the Planck PSZ1 coordinate and show relatively high velocity dispersion. Following this classification, we confirm 53 clusters, which means that 46{\%} of this PSZ1 subsample has been validated and characterized with this technique. Sixty-Two SZ sources (54{\%} of this PSZ1 subset) remain unconfirmed. In addition, we find that the fraction of unconfirmed clusters close to the galactic plane (at |b| < 25°) is greater than that at higher galactic latitudes (|b| > 25°), which indicates contamination produced by radio emission of galactic dust and gas clouds on these SZ detections. In fact, in the majority of the cases, we detect important galactic cirrus in the optical images, mainly in the SZ target located at low galactic latitudes, which supports this hypothesis.",
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Barrena, R, Streblyanska, A, Ferragamo, A, Rubiño-Martín, JA, Aguado-Barahona, A, Tramonte, D, Génova-Santos, RT, Hempel, A, Lietzen, H, Aghanim, N, Arnaud, M, Böhringer, H, Chon, G, Democles, J, Dahle, H, Douspis, M, Lasenby, AN, Mazzotta, P, Melin, JB, Pointecouteau, E, Pratt, GW, Rossetti, M & Van Der Burg, RFJ 2018, 'Optical validation and characterization of Planck PSZ1 sources at the Canary Islands observatories: I. First year of ITP13 observations', Astronomy and Astrophysics, vol. 616, A42. https://doi.org/10.1051/0004-6361/201732315

Optical validation and characterization of Planck PSZ1 sources at the Canary Islands observatories : I. First year of ITP13 observations. / Barrena, R.; Streblyanska, A.; Ferragamo, A.; Rubiño-Martín, J. A.; Aguado-Barahona, A.; Tramonte, D.; Génova-Santos, R. T.; Hempel, A.; Lietzen, H.; Aghanim, N.; Arnaud, M.; Böhringer, H.; Chon, G.; Democles, J.; Dahle, H.; Douspis, M.; Lasenby, A. N.; Mazzotta, P.; Melin, J. B.; Pointecouteau, E.; Pratt, G. W.; Rossetti, M.; Van Der Burg, R. F.J.

En: Astronomy and Astrophysics, Vol. 616, A42, 01.08.2018.

Resultado de la investigación: Article

TY - JOUR

T1 - Optical validation and characterization of Planck PSZ1 sources at the Canary Islands observatories

T2 - I. First year of ITP13 observations

AU - Barrena, R.

AU - Streblyanska, A.

AU - Ferragamo, A.

AU - Rubiño-Martín, J. A.

AU - Aguado-Barahona, A.

AU - Tramonte, D.

AU - Génova-Santos, R. T.

AU - Hempel, A.

AU - Lietzen, H.

AU - Aghanim, N.

AU - Arnaud, M.

AU - Böhringer, H.

AU - Chon, G.

AU - Democles, J.

AU - Dahle, H.

AU - Douspis, M.

AU - Lasenby, A. N.

AU - Mazzotta, P.

AU - Melin, J. B.

AU - Pointecouteau, E.

AU - Pratt, G. W.

AU - Rossetti, M.

AU - Van Der Burg, R. F.J.

PY - 2018/8/1

Y1 - 2018/8/1

N2 - We have identified new clusters and characterized previously unknown Planck Sunyaev-Zeldovich (SZ) sources from the first Planck catalogue of SZ sources (PSZ1). The results presented here correspond to an optical follow-up observational programme developed during approximately one year (2014) at Roque de los Muchachos Observatory, using the 2.5 m Isaac Newton telescope, the 3.5 m Telescopio Nazionale Galileo, the 4.2 m William Herschel telescope and the 10.4 m Gran Telescopio Canarias. We have characterized 115 new PSZ1 sources using deep optical imaging and spectroscopy. We adopted robust criteria in order to consolidate the SZ counterparts by analysing the optical richness, the 2D galaxy distribution, and velocity dispersions of clusters. Confirmed counterparts are considered to be validated if they are rich structures, well aligned with the Planck PSZ1 coordinate and show relatively high velocity dispersion. Following this classification, we confirm 53 clusters, which means that 46% of this PSZ1 subsample has been validated and characterized with this technique. Sixty-Two SZ sources (54% of this PSZ1 subset) remain unconfirmed. In addition, we find that the fraction of unconfirmed clusters close to the galactic plane (at |b| < 25°) is greater than that at higher galactic latitudes (|b| > 25°), which indicates contamination produced by radio emission of galactic dust and gas clouds on these SZ detections. In fact, in the majority of the cases, we detect important galactic cirrus in the optical images, mainly in the SZ target located at low galactic latitudes, which supports this hypothesis.

AB - We have identified new clusters and characterized previously unknown Planck Sunyaev-Zeldovich (SZ) sources from the first Planck catalogue of SZ sources (PSZ1). The results presented here correspond to an optical follow-up observational programme developed during approximately one year (2014) at Roque de los Muchachos Observatory, using the 2.5 m Isaac Newton telescope, the 3.5 m Telescopio Nazionale Galileo, the 4.2 m William Herschel telescope and the 10.4 m Gran Telescopio Canarias. We have characterized 115 new PSZ1 sources using deep optical imaging and spectroscopy. We adopted robust criteria in order to consolidate the SZ counterparts by analysing the optical richness, the 2D galaxy distribution, and velocity dispersions of clusters. Confirmed counterparts are considered to be validated if they are rich structures, well aligned with the Planck PSZ1 coordinate and show relatively high velocity dispersion. Following this classification, we confirm 53 clusters, which means that 46% of this PSZ1 subsample has been validated and characterized with this technique. Sixty-Two SZ sources (54% of this PSZ1 subset) remain unconfirmed. In addition, we find that the fraction of unconfirmed clusters close to the galactic plane (at |b| < 25°) is greater than that at higher galactic latitudes (|b| > 25°), which indicates contamination produced by radio emission of galactic dust and gas clouds on these SZ detections. In fact, in the majority of the cases, we detect important galactic cirrus in the optical images, mainly in the SZ target located at low galactic latitudes, which supports this hypothesis.

KW - Catalogs

KW - Galaxies: clusters: general

KW - Large-scale structure of Universe

UR - http://www.scopus.com/inward/record.url?scp=85052871332&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201732315

DO - 10.1051/0004-6361/201732315

M3 - Article

AN - SCOPUS:85052871332

VL - 616

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

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