skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: HST/ACS EMISSION LINE IMAGING OF LOW-REDSHIFT 3CR RADIO GALAXIES. I. THE DATA

Abstract

We present 19 nearby (z < 0.3) 3CR radio galaxies imaged at low and high excitation as part of a Cycle 15 Hubble Space Telescope (HST) snapshot survey with the Advanced Camera for Surveys (ACS). These images consist of exposures of the H{alpha} (6563 A, plus [N II] contamination) and [O III]{lambda}5007 emission lines using narrowband linear ramp filters adjusted according to the redshift of the target. To facilitate continuum subtraction, a single-pointing 60 s line-free exposure was taken with a mediumband filter appropriate for the target's redshift. We discuss the steps taken to reduce these images independently of the automated recalibration pipeline so as to use more recent ACS flat-field data as well as to better reject cosmic rays. We describe the method used to produce continuum-free (pure line-emission) images, and present these images along with qualitative descriptions of the narrow-line region morphologies we observe. We present H{alpha}+[N II] and [O III] line fluxes from aperture photometry, finding the values to fall expectedly on the redshift-luminosity trend from a past HST/WFPC2 emission line study of a larger, generally higher redshift subset of the 3CR. We also find expected trends between emission line luminosity and total radio power, as wellmore » as a positive correlation between the size of the emission line region and redshift. We discuss the associated interpretation of these results, and conclude with a summary of future work enabled by this data set.« less

Authors:
; ; ;  [1]; ; ; ;  [2];  [3];  [4]; ;  [5];  [6]
  1. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)
  2. Rochester Institute of Technology, 84 Lomb Memorial Drive, Rochester, NY 14623 (United States)
  3. Centre de Donnees Astronomique, 11 Rue de l'Universite, 67000 Strasbourg (France)
  4. INAF-Osservatorio Astronomico di Torino, Strada Osservatorio 20, 10025 Pino Torinese (Italy)
  5. Las Campanas Observatory, Observatories of the Carnegie Institute of Washington, Casilla 601, La Serena (Chile)
  6. Physics and Space Sciences Department, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901 (United States)
Publication Date:
OSTI Identifier:
21301648
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal, Supplement Series
Additional Journal Information:
Journal Volume: 183; Journal Issue: 2; Other Information: DOI: 10.1088/0067-0049/183/2/278; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0067-0049
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; APERTURES; CAMERAS; COSMIC RADIATION; LUMINOSITY; MORPHOLOGY; PHOTOMETRY; QUASARS; RADIO GALAXIES; RED SHIFT; TELESCOPES

Citation Formats

Tremblay, Grant R, Chiaberge, Marco, Sparks, William B, Macchetto, F Duccio, Baum, Stefi A, Axon, David J, Noel-Storr, Jacob, O'Dea, Christopher P, Allen, Mark G, Capetti, Alessandro, Floyd, David J. E., Miley, George K, Perlman, Eric S, and Quillen, Alice C. HST/ACS EMISSION LINE IMAGING OF LOW-REDSHIFT 3CR RADIO GALAXIES. I. THE DATA. United States: N. p., 2009. Web. doi:10.1088/0067-0049/183/2/278; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
Tremblay, Grant R, Chiaberge, Marco, Sparks, William B, Macchetto, F Duccio, Baum, Stefi A, Axon, David J, Noel-Storr, Jacob, O'Dea, Christopher P, Allen, Mark G, Capetti, Alessandro, Floyd, David J. E., Miley, George K, Perlman, Eric S, & Quillen, Alice C. HST/ACS EMISSION LINE IMAGING OF LOW-REDSHIFT 3CR RADIO GALAXIES. I. THE DATA. United States. https://doi.org/10.1088/0067-0049/183/2/278; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)
Tremblay, Grant R, Chiaberge, Marco, Sparks, William B, Macchetto, F Duccio, Baum, Stefi A, Axon, David J, Noel-Storr, Jacob, O'Dea, Christopher P, Allen, Mark G, Capetti, Alessandro, Floyd, David J. E., Miley, George K, Perlman, Eric S, and Quillen, Alice C. 2009. "HST/ACS EMISSION LINE IMAGING OF LOW-REDSHIFT 3CR RADIO GALAXIES. I. THE DATA". United States. https://doi.org/10.1088/0067-0049/183/2/278; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
@article{osti_21301648,
title = {HST/ACS EMISSION LINE IMAGING OF LOW-REDSHIFT 3CR RADIO GALAXIES. I. THE DATA},
author = {Tremblay, Grant R and Chiaberge, Marco and Sparks, William B and Macchetto, F Duccio and Baum, Stefi A and Axon, David J and Noel-Storr, Jacob and O'Dea, Christopher P and Allen, Mark G and Capetti, Alessandro and Floyd, David J. E. and Miley, George K and Perlman, Eric S and Quillen, Alice C.},
abstractNote = {We present 19 nearby (z < 0.3) 3CR radio galaxies imaged at low and high excitation as part of a Cycle 15 Hubble Space Telescope (HST) snapshot survey with the Advanced Camera for Surveys (ACS). These images consist of exposures of the H{alpha} (6563 A, plus [N II] contamination) and [O III]{lambda}5007 emission lines using narrowband linear ramp filters adjusted according to the redshift of the target. To facilitate continuum subtraction, a single-pointing 60 s line-free exposure was taken with a mediumband filter appropriate for the target's redshift. We discuss the steps taken to reduce these images independently of the automated recalibration pipeline so as to use more recent ACS flat-field data as well as to better reject cosmic rays. We describe the method used to produce continuum-free (pure line-emission) images, and present these images along with qualitative descriptions of the narrow-line region morphologies we observe. We present H{alpha}+[N II] and [O III] line fluxes from aperture photometry, finding the values to fall expectedly on the redshift-luminosity trend from a past HST/WFPC2 emission line study of a larger, generally higher redshift subset of the 3CR. We also find expected trends between emission line luminosity and total radio power, as well as a positive correlation between the size of the emission line region and redshift. We discuss the associated interpretation of these results, and conclude with a summary of future work enabled by this data set.},
doi = {10.1088/0067-0049/183/2/278; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},
url = {https://www.osti.gov/biblio/21301648}, journal = {Astrophysical Journal, Supplement Series},
issn = {0067-0049},
number = 2,
volume = 183,
place = {United States},
year = {Sat Aug 01 00:00:00 EDT 2009},
month = {Sat Aug 01 00:00:00 EDT 2009}
}