Westerbork ultra-deep survey of HI at z=0.2

Marc Verheijen, Boris Deshev, Jacqueline Van Gorkom, Bianca Poggianti, Aeree Chung, Ryan Cybulski, K. S. Dwarakanath, María Montero-Castaño, Glenn Morrison, David Schiminovich, Arpad Szomoru, Min Yun

Research output: Contribution to journalConference article

Abstract

In this contribution, we present some preliminary observational results from the completed ultra-deep survey of 21cm emission from neutral hydrogen at redshifts z=0.164−0.224 with the Westerbork Synthesis Radio Telescope. In two separate fields, a total of 160 individual galaxies has been detected in neutral hydrogen, with HI masses varying from 1.1×109 to 4.0×1010 M. The largest galaxies are spatially resolved by the synthesized beam of 23×37 arcsec2 while the velocity resolution of 19 km/s allowed the HI emission lines to be well resolved. The large scale structure in the surveyed volume is traced well in HI, apart from the highest density regions like the cores of galaxy clusters. All significant HI detections have obvious or plausible optical counterparts which are usually blue late-type galaxies that are UV-bright. One of the observed fields contains a massive Butcher-Oemler cluster but none of the associated blue galaxies has been detected in HI. The data suggest that the lower-luminosity galaxies at z≈0.2 are more gas-rich than galaxies of similar luminosities at z=0, pending a careful analysis of the completeness near the detection limit. Optical counterparts of the HI detected galaxies are mostly located in the'blue cloud' of the galaxy population although several galaxies on the'red sequence' are also detected in HI. These results hold great promise for future deep 21cm surveys of neutral hydrogen with MeerKAT, APERTIF, ASKAP, and ultimately the Square Kilometre Array.

Original languageEnglish
Article number054
JournalProceedings of Science
Volume112
Publication statusPublished - 2010 Jan 1
Event2010 ISKAF Science Meeting, ISKAF 2010 - Assen, Netherlands
Duration: 2010 Jun 102010 Jun 14

Fingerprint

galaxies
hydrogen
luminosity
radio telescopes
completeness
synthesis
gases

All Science Journal Classification (ASJC) codes

  • General

Cite this

Verheijen, M., Deshev, B., Van Gorkom, J., Poggianti, B., Chung, A., Cybulski, R., ... Yun, M. (2010). Westerbork ultra-deep survey of HI at z=0.2. Proceedings of Science, 112, [054].
Verheijen, Marc ; Deshev, Boris ; Van Gorkom, Jacqueline ; Poggianti, Bianca ; Chung, Aeree ; Cybulski, Ryan ; Dwarakanath, K. S. ; Montero-Castaño, María ; Morrison, Glenn ; Schiminovich, David ; Szomoru, Arpad ; Yun, Min. / Westerbork ultra-deep survey of HI at z=0.2. In: Proceedings of Science. 2010 ; Vol. 112.
@article{c6dd8879f6644d2f9a90cd91b082d4e6,
title = "Westerbork ultra-deep survey of HI at z=0.2",
abstract = "In this contribution, we present some preliminary observational results from the completed ultra-deep survey of 21cm emission from neutral hydrogen at redshifts z=0.164−0.224 with the Westerbork Synthesis Radio Telescope. In two separate fields, a total of 160 individual galaxies has been detected in neutral hydrogen, with HI masses varying from 1.1×109 to 4.0×1010 M☉. The largest galaxies are spatially resolved by the synthesized beam of 23×37 arcsec2 while the velocity resolution of 19 km/s allowed the HI emission lines to be well resolved. The large scale structure in the surveyed volume is traced well in HI, apart from the highest density regions like the cores of galaxy clusters. All significant HI detections have obvious or plausible optical counterparts which are usually blue late-type galaxies that are UV-bright. One of the observed fields contains a massive Butcher-Oemler cluster but none of the associated blue galaxies has been detected in HI. The data suggest that the lower-luminosity galaxies at z≈0.2 are more gas-rich than galaxies of similar luminosities at z=0, pending a careful analysis of the completeness near the detection limit. Optical counterparts of the HI detected galaxies are mostly located in the'blue cloud' of the galaxy population although several galaxies on the'red sequence' are also detected in HI. These results hold great promise for future deep 21cm surveys of neutral hydrogen with MeerKAT, APERTIF, ASKAP, and ultimately the Square Kilometre Array.",
author = "Marc Verheijen and Boris Deshev and {Van Gorkom}, Jacqueline and Bianca Poggianti and Aeree Chung and Ryan Cybulski and Dwarakanath, {K. S.} and Mar{\'i}a Montero-Casta{\~n}o and Glenn Morrison and David Schiminovich and Arpad Szomoru and Min Yun",
year = "2010",
month = "1",
day = "1",
language = "English",
volume = "112",
journal = "Proceedings of Science",
issn = "1824-8039",
publisher = "Sissa Medialab Srl",

}

Verheijen, M, Deshev, B, Van Gorkom, J, Poggianti, B, Chung, A, Cybulski, R, Dwarakanath, KS, Montero-Castaño, M, Morrison, G, Schiminovich, D, Szomoru, A & Yun, M 2010, 'Westerbork ultra-deep survey of HI at z=0.2', Proceedings of Science, vol. 112, 054.

Westerbork ultra-deep survey of HI at z=0.2. / Verheijen, Marc; Deshev, Boris; Van Gorkom, Jacqueline; Poggianti, Bianca; Chung, Aeree; Cybulski, Ryan; Dwarakanath, K. S.; Montero-Castaño, María; Morrison, Glenn; Schiminovich, David; Szomoru, Arpad; Yun, Min.

In: Proceedings of Science, Vol. 112, 054, 01.01.2010.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Westerbork ultra-deep survey of HI at z=0.2

AU - Verheijen, Marc

AU - Deshev, Boris

AU - Van Gorkom, Jacqueline

AU - Poggianti, Bianca

AU - Chung, Aeree

AU - Cybulski, Ryan

AU - Dwarakanath, K. S.

AU - Montero-Castaño, María

AU - Morrison, Glenn

AU - Schiminovich, David

AU - Szomoru, Arpad

AU - Yun, Min

PY - 2010/1/1

Y1 - 2010/1/1

N2 - In this contribution, we present some preliminary observational results from the completed ultra-deep survey of 21cm emission from neutral hydrogen at redshifts z=0.164−0.224 with the Westerbork Synthesis Radio Telescope. In two separate fields, a total of 160 individual galaxies has been detected in neutral hydrogen, with HI masses varying from 1.1×109 to 4.0×1010 M☉. The largest galaxies are spatially resolved by the synthesized beam of 23×37 arcsec2 while the velocity resolution of 19 km/s allowed the HI emission lines to be well resolved. The large scale structure in the surveyed volume is traced well in HI, apart from the highest density regions like the cores of galaxy clusters. All significant HI detections have obvious or plausible optical counterparts which are usually blue late-type galaxies that are UV-bright. One of the observed fields contains a massive Butcher-Oemler cluster but none of the associated blue galaxies has been detected in HI. The data suggest that the lower-luminosity galaxies at z≈0.2 are more gas-rich than galaxies of similar luminosities at z=0, pending a careful analysis of the completeness near the detection limit. Optical counterparts of the HI detected galaxies are mostly located in the'blue cloud' of the galaxy population although several galaxies on the'red sequence' are also detected in HI. These results hold great promise for future deep 21cm surveys of neutral hydrogen with MeerKAT, APERTIF, ASKAP, and ultimately the Square Kilometre Array.

AB - In this contribution, we present some preliminary observational results from the completed ultra-deep survey of 21cm emission from neutral hydrogen at redshifts z=0.164−0.224 with the Westerbork Synthesis Radio Telescope. In two separate fields, a total of 160 individual galaxies has been detected in neutral hydrogen, with HI masses varying from 1.1×109 to 4.0×1010 M☉. The largest galaxies are spatially resolved by the synthesized beam of 23×37 arcsec2 while the velocity resolution of 19 km/s allowed the HI emission lines to be well resolved. The large scale structure in the surveyed volume is traced well in HI, apart from the highest density regions like the cores of galaxy clusters. All significant HI detections have obvious or plausible optical counterparts which are usually blue late-type galaxies that are UV-bright. One of the observed fields contains a massive Butcher-Oemler cluster but none of the associated blue galaxies has been detected in HI. The data suggest that the lower-luminosity galaxies at z≈0.2 are more gas-rich than galaxies of similar luminosities at z=0, pending a careful analysis of the completeness near the detection limit. Optical counterparts of the HI detected galaxies are mostly located in the'blue cloud' of the galaxy population although several galaxies on the'red sequence' are also detected in HI. These results hold great promise for future deep 21cm surveys of neutral hydrogen with MeerKAT, APERTIF, ASKAP, and ultimately the Square Kilometre Array.

UR - http://www.scopus.com/inward/record.url?scp=85053840267&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85053840267&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85053840267

VL - 112

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

M1 - 054

ER -

Verheijen M, Deshev B, Van Gorkom J, Poggianti B, Chung A, Cybulski R et al. Westerbork ultra-deep survey of HI at z=0.2. Proceedings of Science. 2010 Jan 1;112. 054.