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Discovery of a z = 0.65 post-starburst BAL quasar in the DES supernova fields

Discovery of a z = 0.65 post-starburst BAL quasar in the DES supernova fields
Discovery of a z = 0.65 post-starburst BAL quasar in the DES supernova fields
We present the discovery of a z = 0.65 low-ionization broad absorption line (LoBAL) quasar in a post-starburst galaxy in data from the Dark Energy Survey (DES) and spectroscopy from the Australian Dark Energy Survey (OzDES). LoBAL quasars are a minority of all BALs, and rarer still is that this object also exhibits broad Fe II (an FeLoBAL) and Balmer absorption. This is the first BAL quasar that has signatures of recently truncated star formation, which we estimate ended about 40 Myr ago. The characteristic signatures of an FeLoBAL require high column densities, which could be explained by the emergence of a young quasar from an early, dust-enshrouded phase, or by clouds compressed by a blast wave. The age of the starburst component is comparable to estimates of the lifetime of quasars, so if we assume the quasar activity is related to the truncation of the star formation, this object is better explained by the blast wave scenario.
galaxies: active, quasars: absorption lines, galaxies: starburst
1365-2966
3682-3688
Mudd, Dale
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Martini, Paul
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Lidman, Chris
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McMahon, Richard
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Davis, Tamara
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Sharp, Rob
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Uddin, Syed
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Walker, Alistair
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Mudd, Dale
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Martini, Paul
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Tie, Suk Sien
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Lidman, Chris
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McMahon, Richard
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Banerji, Manda
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Davis, Tamara
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Peterson, Bradley
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Sharp, Rob
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Seymour, Nicholas
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Childress, Michael
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Lewis, Geraint
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Yuan, Fang
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Abbot, Tim
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Abdalla, Filipe
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Bertin, Emmanuel
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Brooks, David
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Camero Rosell, A.
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Carrasco Kind, Matias
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Carretero, Jorge
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da Costa, Luiz N.
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Desai, Shantanu
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Diehl, Thomas
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Eifler, Tim
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Finley, David
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Flaugher, Brenna
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Glazebrook, Karl
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Gruen, Daniel
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Miquel, Ramon
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Ogando, Ricardo
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Plazas, Andres
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Riel, Kevin
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Sanchez, Eusebio
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Santiago, Basillio
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Schubnell, Michael
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Smith, Robert C.
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Suchyta, Eric
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Swanson, Molly
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Tarle, Gregory
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Thomas, Daniel
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Uddin, Syed
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Walker, Alistair
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Zhang, Bonnie
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Mudd, Dale, Martini, Paul, Tie, Suk Sien, Lidman, Chris, McMahon, Richard, Banerji, Manda, Davis, Tamara, Peterson, Bradley, Sharp, Rob, Seymour, Nicholas, Childress, Michael, Lewis, Geraint, Tucker, Brad, Yuan, Fang, Abbot, Tim, Abdalla, Filipe, Allam, Sahar, Benoit-Lévy, Aurélien, Bertin, Emmanuel, Brooks, David, Camero Rosell, A., Carrasco Kind, Matias, Carretero, Jorge, da Costa, Luiz N., Desai, Shantanu, Diehl, Thomas, Eifler, Tim, Finley, David, Flaugher, Brenna, Glazebrook, Karl, Gruen, Daniel, Gruendl, Robert, Gutierrez, Gaston, Hinton, Samuel, Honscheid, Klaus, James, David, Kuehn, Kyler, Kuropatkin, Nikolav, Macaulay, Edward, Maia, Marcio A. G., Miquel, Ramon, Ogando, Ricardo, Plazas, Andres, Riel, Kevin, Sanchez, Eusebio, Santiago, Basillio, Schubnell, Michael, Sevilla-Noarbe, Ignacio, Smith, Robert C., Soares-Santos, Marcelle, Sobreira, Flavia, Suchyta, Eric, Swanson, Molly, Tarle, Gregory, Thomas, Daniel, Uddin, Syed, Walker, Alistair and Zhang, Bonnie (2017) Discovery of a z = 0.65 post-starburst BAL quasar in the DES supernova fields. Monthly Notices Of The Royal Astronomical Society, 468 (3), 3682-3688. (doi:10.1093/mnras/stx708).

Record type: Article

Abstract

We present the discovery of a z = 0.65 low-ionization broad absorption line (LoBAL) quasar in a post-starburst galaxy in data from the Dark Energy Survey (DES) and spectroscopy from the Australian Dark Energy Survey (OzDES). LoBAL quasars are a minority of all BALs, and rarer still is that this object also exhibits broad Fe II (an FeLoBAL) and Balmer absorption. This is the first BAL quasar that has signatures of recently truncated star formation, which we estimate ended about 40 Myr ago. The characteristic signatures of an FeLoBAL require high column densities, which could be explained by the emergence of a young quasar from an early, dust-enshrouded phase, or by clouds compressed by a blast wave. The age of the starburst component is comparable to estimates of the lifetime of quasars, so if we assume the quasar activity is related to the truncation of the star formation, this object is better explained by the blast wave scenario.

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Published date: 1 July 2017
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Keywords: galaxies: active, quasars: absorption lines, galaxies: starburst

Identifiers

Local EPrints ID: 507488
URI: http://eprints.soton.ac.uk/id/eprint/507488
DOI: doi:10.1093/mnras/stx708
ISSN: 1365-2966
PURE UUID: f12e4df6-3faa-45e0-a4ca-c0bf79f11e3e
ORCID for Manda Banerji: ORCID iD orcid.org/0000-0002-0639-5141

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Date deposited: 10 Dec 2025 17:50
Last modified: 11 Dec 2025 02:59

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Contributors

Author: Dale Mudd
Author: Paul Martini
Author: Suk Sien Tie
Author: Chris Lidman
Author: Richard McMahon
Author: Manda Banerji ORCID iD
Author: Tamara Davis
Author: Bradley Peterson
Author: Rob Sharp
Author: Nicholas Seymour
Author: Michael Childress
Author: Geraint Lewis
Author: Brad Tucker
Author: Fang Yuan
Author: Tim Abbot
Author: Filipe Abdalla
Author: Sahar Allam
Author: Aurélien Benoit-Lévy
Author: Emmanuel Bertin
Author: David Brooks
Author: A. Camero Rosell
Author: Matias Carrasco Kind
Author: Jorge Carretero
Author: Luiz N. da Costa
Author: Shantanu Desai
Author: Thomas Diehl
Author: Tim Eifler
Author: David Finley
Author: Brenna Flaugher
Author: Karl Glazebrook
Author: Daniel Gruen
Author: Robert Gruendl
Author: Gaston Gutierrez
Author: Samuel Hinton
Author: Klaus Honscheid
Author: David James
Author: Kyler Kuehn
Author: Nikolav Kuropatkin
Author: Edward Macaulay
Author: Marcio A. G. Maia
Author: Ramon Miquel
Author: Ricardo Ogando
Author: Andres Plazas
Author: Kevin Riel
Author: Eusebio Sanchez
Author: Basillio Santiago
Author: Michael Schubnell
Author: Ignacio Sevilla-Noarbe
Author: Robert C. Smith
Author: Marcelle Soares-Santos
Author: Flavia Sobreira
Author: Eric Suchyta
Author: Molly Swanson
Author: Gregory Tarle
Author: Daniel Thomas
Author: Syed Uddin
Author: Alistair Walker
Author: Bonnie Zhang

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