The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey

L. K. Morabito; J. H. Matthews; P. N. Best; G. Gürkan; M. J. Jarvis; I. Prandoni; K. J. Duncan; M. J. Hardcastle; M. Kunert-Bajraszewska; A. P. Mechev; S. Mooney; J. Sabater; H. J. A. Röttgering; T. W. Shimwell; D. J. B. Smith; C. Tasse; W. L. Williams

doi:10.1051/0004-6361/201833821

The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey

L. K. Morabito
, J. H. Matthews
, P. N. Best
, G. Gürkan
, M. J. Jarvis
, I. Prandoni
, K. J. Duncan
, M. J. Hardcastle
, M. Kunert-Bajraszewska
, A. P. Mechev
, S. Mooney
, J. Sabater
, H. J. A. Röttgering
, T. W. Shimwell
, D. J. B. Smith
, C. Tasse
, W. L. Williams

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present a study of the low-frequency radio properties of broad absorption line quasars (BALQSOs) from the LOFAR Two-metre Sky-Survey Data Release 1 (LDR1). The value-added LDR1 catalogue contains Pan-STARRS counterparts, which we match with the Sloan Digital Sky Survey (SDSS) DR7 and DR12 quasar catalogues. We find that BALQSOs are twice as likely to be detected at 144$\,$MHz than their non-BAL counterparts, and BALQSOs with low-ionisation species present in their spectra are three times more likely to be detected than those with only high-ionisation species. The BALQSO fraction at 144$\,$MHz is constant with increasing radio luminosity, which is inconsistent with previous results at 1.4$\,$GHz, indicating that observations at the different frequencies may be tracing different sources of radio emission. We cross-match radio sources between the Faint Images of the Radio Sky at Twenty Centimeters (FIRST) survey and LDR1, which provides a bridge via the LDR1 Pan-STARRS counterparts to identify BALQSOs in SDSS. Consequently we expand the sample of BALQSOs detected in FIRST by a factor of three. The LDR1-detected BALQSOs in our sample are almost exclusively radio-quiet (\logr $\,

Original language	English
Number of pages	19
Journal	Astronomy & Astrophysics
DOIs	https://doi.org/10.1051/0004-6361/201833821
Publication status	Published - 1 Feb 2019

Keywords / Materials (for Non-textual outputs)

astro-ph.GA

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10.1051/0004-6361/201833821

1811.07931Accepted author manuscript, 3.15 MB

https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/201833821

Astronomy and Astrophysics at Edinburgh
Taylor, A. (Principal Investigator), Best, P. (Co-investigator), Biller, B. (Co-investigator), Dunlop, J. (Co-investigator), Ivison, R. (Co-investigator), Khochfar, S. (Co-investigator), McLure, R. (Co-investigator) & Meiksin, A. (Co-investigator)
STFC
1/04/18 → 31/03/21
Project: Research
Astronomy and Astrophysics at Edinburgh
Dunlop, J. (Principal Investigator), Best, P. (Co-investigator), Biller, B. (Co-investigator), Ferguson, A. (Co-investigator), Hambly, N. (Co-investigator), Heymans, C. (Co-investigator), Khochfar, S. (Co-investigator), Lawrence, A. (Co-investigator), Liddle, A. (Co-investigator), Mann, B. (Co-investigator), McLure, R. (Co-investigator), Meiksin, A. (Co-investigator), Peacock, J. (Co-investigator), Penarrubia, J. (Co-investigator), Rice, K. (Co-investigator) & Taylor, A. (Co-investigator)
STFC
1/04/15 → 30/09/18
Project: Research

Cite this

Morabito, L. K., Matthews, J. H., Best, P. N., Gürkan, G., Jarvis, M. J., Prandoni, I., Duncan, K. J., Hardcastle, M. J., Kunert-Bajraszewska, M., Mechev, A. P., Mooney, S., Sabater, J., Röttgering, H. J. A., Shimwell, T. W., Smith, D. J. B., Tasse, C., & Williams, W. L. (2019). The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey. Astronomy & Astrophysics. https://doi.org/10.1051/0004-6361/201833821

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title = "The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey",

abstract = " We present a study of the low-frequency radio properties of broad absorption line quasars (BALQSOs) from the LOFAR Two-metre Sky-Survey Data Release 1 (LDR1). The value-added LDR1 catalogue contains Pan-STARRS counterparts, which we match with the Sloan Digital Sky Survey (SDSS) DR7 and DR12 quasar catalogues. We find that BALQSOs are twice as likely to be detected at 144\$\textbackslash{},\$MHz than their non-BAL counterparts, and BALQSOs with low-ionisation species present in their spectra are three times more likely to be detected than those with only high-ionisation species. The BALQSO fraction at 144\$\textbackslash{},\$MHz is constant with increasing radio luminosity, which is inconsistent with previous results at 1.4\$\textbackslash{},\$GHz, indicating that observations at the different frequencies may be tracing different sources of radio emission. We cross-match radio sources between the Faint Images of the Radio Sky at Twenty Centimeters (FIRST) survey and LDR1, which provides a bridge via the LDR1 Pan-STARRS counterparts to identify BALQSOs in SDSS. Consequently we expand the sample of BALQSOs detected in FIRST by a factor of three. The LDR1-detected BALQSOs in our sample are almost exclusively radio-quiet (\textbackslash{}logr \$\textbackslash{},",

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author = "Morabito, \{L. K.\} and Matthews, \{J. H.\} and Best, \{P. N.\} and G. G{\"u}rkan and Jarvis, \{M. J.\} and I. Prandoni and Duncan, \{K. J.\} and Hardcastle, \{M. J.\} and M. Kunert-Bajraszewska and Mechev, \{A. P.\} and S. Mooney and J. Sabater and R{\"o}ttgering, \{H. J. A.\} and Shimwell, \{T. W.\} and Smith, \{D. J. B.\} and C. Tasse and Williams, \{W. L.\}",

note = "16 figures, 3 tables and 19 pages. This paper is part of the LOFAR surveys data release 1 and has been accepted for publication in a special edition of A\&A that will appear in Feb 2019, volume 622. The catalogues and images from the data release will be publicly available on lofar-surveys.org upon publication of the journal",

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doi = "10.1051/0004-6361/201833821",

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Morabito, LK, Matthews, JH, Best, PN, Gürkan, G, Jarvis, MJ, Prandoni, I, Duncan, KJ, Hardcastle, MJ, Kunert-Bajraszewska, M, Mechev, AP, Mooney, S, Sabater, J, Röttgering, HJA, Shimwell, TW, Smith, DJB, Tasse, C & Williams, WL 2019, 'The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey', Astronomy & Astrophysics. https://doi.org/10.1051/0004-6361/201833821

TY - JOUR

T1 - The origin of radio emission in broad absorption line quasars

T2 - Results from the LOFAR Two-metre Sky Survey

AU - Morabito, L. K.

AU - Matthews, J. H.

AU - Best, P. N.

AU - Gürkan, G.

AU - Jarvis, M. J.

AU - Prandoni, I.

AU - Duncan, K. J.

AU - Hardcastle, M. J.

AU - Kunert-Bajraszewska, M.

AU - Mechev, A. P.

AU - Mooney, S.

AU - Sabater, J.

AU - Röttgering, H. J. A.

AU - Shimwell, T. W.

AU - Smith, D. J. B.

AU - Tasse, C.

AU - Williams, W. L.

N1 - 16 figures, 3 tables and 19 pages. This paper is part of the LOFAR surveys data release 1 and has been accepted for publication in a special edition of A&A that will appear in Feb 2019, volume 622. The catalogues and images from the data release will be publicly available on lofar-surveys.org upon publication of the journal

PY - 2019/2/1

Y1 - 2019/2/1

N2 - We present a study of the low-frequency radio properties of broad absorption line quasars (BALQSOs) from the LOFAR Two-metre Sky-Survey Data Release 1 (LDR1). The value-added LDR1 catalogue contains Pan-STARRS counterparts, which we match with the Sloan Digital Sky Survey (SDSS) DR7 and DR12 quasar catalogues. We find that BALQSOs are twice as likely to be detected at 144$\,$MHz than their non-BAL counterparts, and BALQSOs with low-ionisation species present in their spectra are three times more likely to be detected than those with only high-ionisation species. The BALQSO fraction at 144$\,$MHz is constant with increasing radio luminosity, which is inconsistent with previous results at 1.4$\,$GHz, indicating that observations at the different frequencies may be tracing different sources of radio emission. We cross-match radio sources between the Faint Images of the Radio Sky at Twenty Centimeters (FIRST) survey and LDR1, which provides a bridge via the LDR1 Pan-STARRS counterparts to identify BALQSOs in SDSS. Consequently we expand the sample of BALQSOs detected in FIRST by a factor of three. The LDR1-detected BALQSOs in our sample are almost exclusively radio-quiet (\logr $\,

AB - We present a study of the low-frequency radio properties of broad absorption line quasars (BALQSOs) from the LOFAR Two-metre Sky-Survey Data Release 1 (LDR1). The value-added LDR1 catalogue contains Pan-STARRS counterparts, which we match with the Sloan Digital Sky Survey (SDSS) DR7 and DR12 quasar catalogues. We find that BALQSOs are twice as likely to be detected at 144$\,$MHz than their non-BAL counterparts, and BALQSOs with low-ionisation species present in their spectra are three times more likely to be detected than those with only high-ionisation species. The BALQSO fraction at 144$\,$MHz is constant with increasing radio luminosity, which is inconsistent with previous results at 1.4$\,$GHz, indicating that observations at the different frequencies may be tracing different sources of radio emission. We cross-match radio sources between the Faint Images of the Radio Sky at Twenty Centimeters (FIRST) survey and LDR1, which provides a bridge via the LDR1 Pan-STARRS counterparts to identify BALQSOs in SDSS. Consequently we expand the sample of BALQSOs detected in FIRST by a factor of three. The LDR1-detected BALQSOs in our sample are almost exclusively radio-quiet (\logr $\,

KW - astro-ph.GA

U2 - 10.1051/0004-6361/201833821

DO - 10.1051/0004-6361/201833821

M3 - Article

SN - 0004-6361

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

ER -

The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey

Abstract

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Astronomy and Astrophysics at Edinburgh

Astronomy and Astrophysics at Edinburgh

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