The FIRST-Optical-VLA Survey for Lensed Radio Lobes

Deborah B Haarsma; Joshua N Winn; Emilio E Falco; Christopher S Kochanek; Philip Ammar; Catherine Boersma; Shannon Fogwell; T W B Muxlow; Brian A McLeod; Joseph Lehár

The FIRST-Optical-VLA Survey for Lensed Radio Lobes

Deborah B Haarsma, Joshua N Winn, Emilio E Falco, Christopher S Kochanek, Philip Ammar, Catherine Boersma, Shannon Fogwell, T W B Muxlow, Brian A McLeod, Joseph Lehár

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Abstract

We present results from a survey for gravitationally lensed radio lobes. Lensed lobes are a potentially richer source of information about galaxy mass distributions than lensed point sources, which have been the exclusive focus of other recent surveys. Our approach is to identify radio lobes in the Faint Images of the Radio Sky at Twenty cm (FIRST) catalog and then search optical catalogs for coincident foreground galaxies, which are candidate lensing galaxies. We then obtain higher resolution images of these targets at both optical and radio wavelengths and obtain optical spectra for the most promising candidates. We present maps of several radio lobes that are nearly coincident with galaxies. We have not found any new and unambiguous cases of gravitational lensing. One radio lobe in particular, FOV J0743+1553, has two hot spots that could be multiple images produced by a z=0.19 spiral galaxy, but the lensing interpretation is problematic.

Original language	English
Pages (from-to)	1977-1995
Number of pages	19
Journal	The Astronomical Journal
Volume	130
Publication status	Published - 2005

Keywords

galaxies: individual (FOV J0743+1553)
Galaxies: Spiral
Gravitational Lensing
Radio Continuum: Galaxies

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http://adsabs.harvard.edu/abs/2005AJ....130.1977H

Cite this

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title = "The FIRST-Optical-VLA Survey for Lensed Radio Lobes",

abstract = "We present results from a survey for gravitationally lensed radio lobes. Lensed lobes are a potentially richer source of information about galaxy mass distributions than lensed point sources, which have been the exclusive focus of other recent surveys. Our approach is to identify radio lobes in the Faint Images of the Radio Sky at Twenty cm (FIRST) catalog and then search optical catalogs for coincident foreground galaxies, which are candidate lensing galaxies. We then obtain higher resolution images of these targets at both optical and radio wavelengths and obtain optical spectra for the most promising candidates. We present maps of several radio lobes that are nearly coincident with galaxies. We have not found any new and unambiguous cases of gravitational lensing. One radio lobe in particular, FOV J0743+1553, has two hot spots that could be multiple images produced by a z=0.19 spiral galaxy, but the lensing interpretation is problematic.",

keywords = "galaxies: individual (FOV J0743+1553), Galaxies: Spiral, Gravitational Lensing, Radio Continuum: Galaxies",

author = "Haarsma, {Deborah B} and Winn, {Joshua N} and Falco, {Emilio E} and Kochanek, {Christopher S} and Philip Ammar and Catherine Boersma and Shannon Fogwell and Muxlow, {T W B} and McLeod, {Brian A} and Joseph Leh{\'a}r",

year = "2005",

language = "English",

volume = "130",

pages = "1977--1995",

journal = "The Astronomical Journal",

issn = "0004-6256",

publisher = "IOP Publishing Ltd",

}

TY - JOUR

T1 - The FIRST-Optical-VLA Survey for Lensed Radio Lobes

AU - Haarsma, Deborah B

AU - Winn, Joshua N

AU - Falco, Emilio E

AU - Kochanek, Christopher S

AU - Ammar, Philip

AU - Boersma, Catherine

AU - Fogwell, Shannon

AU - Muxlow, T W B

AU - McLeod, Brian A

AU - Lehár, Joseph

PY - 2005

Y1 - 2005

N2 - We present results from a survey for gravitationally lensed radio lobes. Lensed lobes are a potentially richer source of information about galaxy mass distributions than lensed point sources, which have been the exclusive focus of other recent surveys. Our approach is to identify radio lobes in the Faint Images of the Radio Sky at Twenty cm (FIRST) catalog and then search optical catalogs for coincident foreground galaxies, which are candidate lensing galaxies. We then obtain higher resolution images of these targets at both optical and radio wavelengths and obtain optical spectra for the most promising candidates. We present maps of several radio lobes that are nearly coincident with galaxies. We have not found any new and unambiguous cases of gravitational lensing. One radio lobe in particular, FOV J0743+1553, has two hot spots that could be multiple images produced by a z=0.19 spiral galaxy, but the lensing interpretation is problematic.

AB - We present results from a survey for gravitationally lensed radio lobes. Lensed lobes are a potentially richer source of information about galaxy mass distributions than lensed point sources, which have been the exclusive focus of other recent surveys. Our approach is to identify radio lobes in the Faint Images of the Radio Sky at Twenty cm (FIRST) catalog and then search optical catalogs for coincident foreground galaxies, which are candidate lensing galaxies. We then obtain higher resolution images of these targets at both optical and radio wavelengths and obtain optical spectra for the most promising candidates. We present maps of several radio lobes that are nearly coincident with galaxies. We have not found any new and unambiguous cases of gravitational lensing. One radio lobe in particular, FOV J0743+1553, has two hot spots that could be multiple images produced by a z=0.19 spiral galaxy, but the lensing interpretation is problematic.

KW - galaxies: individual (FOV J0743+1553)

KW - Galaxies: Spiral

KW - Gravitational Lensing

KW - Radio Continuum: Galaxies

M3 - Article

SN - 0004-6256

VL - 130

SP - 1977

EP - 1995

JO - The Astronomical Journal

JF - The Astronomical Journal

ER -

The FIRST-Optical-VLA Survey for Lensed Radio Lobes

Abstract

Keywords

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