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

Centre for Astrophysics Research (CAR)

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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	Undefined/Unknown
Journal	Astronomy & Astrophysics
Early online date	16 Aug 2018
DOIs	https://doi.org/10.1051/0004-6361/201833821
Publication status	E-pub ahead of print - 16 Aug 2018

Keywords

astro-ph.GA

Access to Document

10.1051/0004-6361/201833821

1811.07931v1
Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO
Accepted author manuscript, 3.32 MBLicence: Other

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. (2018). The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey. Astronomy & Astrophysics. Advance online publication. 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$\,$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 $\,",

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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. Reproduced with permission from Astronomy & Astrophysics. {\textcopyright} 2018 ESO ",

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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 2018, '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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T1 - The origin of radio emission in broad absorption line quasars: 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. Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO

PY - 2018/8/16

Y1 - 2018/8/16

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 -