Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars

Rajib Ganguly; Michael S. Brotherton; Nahum Arav; Sara R. Heap; Lutz Wisotzki; Thomas L. Aldcroft; Danielle Alloin; Ehud Behar; Gabriela Canalizo; D. Michael Crenshaw; Martijn de Kool; Kenneth Chambers; Gerald Cecil; Eleni Chatzichristou; John Everett; Jack Gabel; C. Martin Gaskell; Emmanuel Galliano; Richard F. Green; Patrick B. Hall; Dean C. Hines; Vesa T. Junkkarinen; Jelle S. Kaastra; Mary Elizabeth Kaiser; Demosthenes Kazanas; Arieh Konigl; Kirk T. Korista; Gerard A. Kriss; Ari Laor; Karen M. Leighly; Smita Mathur; Patrick Ogle; Daniel Proga; Bassem Sabra; Ran Sivron; Stephanie Snedden; Randal Telfer; Marianne Vestergaard

doi:10.1086/510129

Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars

Rajib Ganguly, Michael S. Brotherton, Nahum Arav, Sara R. Heap, Lutz Wisotzki, Thomas L. Aldcroft, Danielle Alloin, Ehud Behar, Gabriela Canalizo, D. Michael Crenshaw, Martijn de Kool, Kenneth Chambers, Gerald Cecil, Eleni Chatzichristou, John Everett, Jack Gabel, C. Martin Gaskell, Emmanuel Galliano, Richard F. Green, Patrick B. HallDean C. Hines, Vesa T. Junkkarinen, Jelle S. Kaastra, Mary Elizabeth Kaiser, Demosthenes Kazanas, Arieh Konigl, Kirk T. Korista, Gerard A. Kriss, Ari Laor, Karen M. Leighly, Smita Mathur, Patrick Ogle, Daniel Proga, Bassem Sabra, Ran Sivron, Stephanie Snedden, Randal Telfer, Marianne Vestergaard

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Abstract

We present low-resolution ultraviolet spectra of 14 low redshift (z zz 1.4 Large Bright Quasar samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the v ~ L^0.62 relation derived by Laor & Brandt (2002). Another quasar, HE0441-2826, contains extremely weak emission lines and our spectrum is consistent with a simple power-law continuum. The quasar is radio-loud, but has a steep spectral index and a lobe-dominated morphology, which argues against it being a blazar. The unusual spectrum of this quasar resembles the spectra of the quasars PG1407+265, SDSSJ1136+0242, and PKS1004+13 for which several possible explanations have been entertained.

Originalsprog	Engelsk
Artikelnummer	479
Tidsskrift	Astrophysical Journal
Vol/bind	133
Udgave nummer	2
ISSN	0004-637X
DOI	https://doi.org/10.1086/510129
Status	Udgivet - 8 jan. 2007

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Ganguly, R., Brotherton, M. S., Arav, N., Heap, S. R., Wisotzki, L., Aldcroft, T. L., Alloin, D., Behar, E., Canalizo, G., Crenshaw, D. M., Kool, M. D., Chambers, K., Cecil, G., Chatzichristou, E., Everett, J., Gabel, J., Gaskell, C. M., Galliano, E., Green, R. F., ... Vestergaard, M. (2007). Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars. Astrophysical Journal, 133(2), [479]. https://doi.org/10.1086/510129

Ganguly, R, Brotherton, MS, Arav, N, Heap, SR, Wisotzki, L, Aldcroft, TL, Alloin, D, Behar, E, Canalizo, G, Crenshaw, DM, Kool, MD, Chambers, K, Cecil, G, Chatzichristou, E, Everett, J, Gabel, J, Gaskell, CM, Galliano, E, Green, RF, Hall, PB, Hines, DC, Junkkarinen, VT, Kaastra, JS, Kaiser, ME, Kazanas, D, Konigl, A, Korista, KT, Kriss, GA, Laor, A, Leighly, KM, Mathur, S, Ogle, P, Proga, D, Sabra, B, Sivron, R, Snedden, S, Telfer, R & Vestergaard, M 2007, 'Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars', Astrophysical Journal, bind 133, nr. 2, 479. https://doi.org/10.1086/510129

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title = "Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars",

abstract = "We present low-resolution ultraviolet spectra of 14 low redshift (z zz 1.4 Large Bright Quasar samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the v ~ L^0.62 relation derived by Laor & Brandt (2002). Another quasar, HE0441-2826, contains extremely weak emission lines and our spectrum is consistent with a simple power-law continuum. The quasar is radio-loud, but has a steep spectral index and a lobe-dominated morphology, which argues against it being a blazar. The unusual spectrum of this quasar resembles the spectra of the quasars PG1407+265, SDSSJ1136+0242, and PKS1004+13 for which several possible explanations have been entertained.",

keywords = "astro-ph",

author = "Rajib Ganguly and Brotherton, {Michael S.} and Nahum Arav and Heap, {Sara R.} and Lutz Wisotzki and Aldcroft, {Thomas L.} and Danielle Alloin and Ehud Behar and Gabriela Canalizo and Crenshaw, {D. Michael} and Kool, {Martijn de} and Kenneth Chambers and Gerald Cecil and Eleni Chatzichristou and John Everett and Jack Gabel and Gaskell, {C. Martin} and Emmanuel Galliano and Green, {Richard F.} and Hall, {Patrick B.} and Hines, {Dean C.} and Junkkarinen, {Vesa T.} and Kaastra, {Jelle S.} and Kaiser, {Mary Elizabeth} and Demosthenes Kazanas and Arieh Konigl and Korista, {Kirk T.} and Kriss, {Gerard A.} and Ari Laor and Leighly, {Karen M.} and Smita Mathur and Patrick Ogle and Daniel Proga and Bassem Sabra and Ran Sivron and Stephanie Snedden and Randal Telfer and Marianne Vestergaard",

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doi = "10.1086/510129",

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journal = "Astrophysical Journal",

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T1 - Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars

AU - Ganguly, Rajib

AU - Brotherton, Michael S.

AU - Arav, Nahum

AU - Heap, Sara R.

AU - Wisotzki, Lutz

AU - Aldcroft, Thomas L.

AU - Alloin, Danielle

AU - Behar, Ehud

AU - Canalizo, Gabriela

AU - Crenshaw, D. Michael

AU - Kool, Martijn de

AU - Chambers, Kenneth

AU - Cecil, Gerald

AU - Chatzichristou, Eleni

AU - Everett, John

AU - Gabel, Jack

AU - Gaskell, C. Martin

AU - Galliano, Emmanuel

AU - Green, Richard F.

AU - Hall, Patrick B.

AU - Hines, Dean C.

AU - Junkkarinen, Vesa T.

AU - Kaastra, Jelle S.

AU - Kaiser, Mary Elizabeth

AU - Kazanas, Demosthenes

AU - Konigl, Arieh

AU - Korista, Kirk T.

AU - Kriss, Gerard A.

AU - Laor, Ari

AU - Leighly, Karen M.

AU - Mathur, Smita

AU - Ogle, Patrick

AU - Proga, Daniel

AU - Sabra, Bassem

AU - Sivron, Ran

AU - Snedden, Stephanie

AU - Telfer, Randal

AU - Vestergaard, Marianne

PY - 2007/1/8

Y1 - 2007/1/8

N2 - We present low-resolution ultraviolet spectra of 14 low redshift (z zz 1.4 Large Bright Quasar samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the v ~ L^0.62 relation derived by Laor & Brandt (2002). Another quasar, HE0441-2826, contains extremely weak emission lines and our spectrum is consistent with a simple power-law continuum. The quasar is radio-loud, but has a steep spectral index and a lobe-dominated morphology, which argues against it being a blazar. The unusual spectrum of this quasar resembles the spectra of the quasars PG1407+265, SDSSJ1136+0242, and PKS1004+13 for which several possible explanations have been entertained.

AB - We present low-resolution ultraviolet spectra of 14 low redshift (z zz 1.4 Large Bright Quasar samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the v ~ L^0.62 relation derived by Laor & Brandt (2002). Another quasar, HE0441-2826, contains extremely weak emission lines and our spectrum is consistent with a simple power-law continuum. The quasar is radio-loud, but has a steep spectral index and a lobe-dominated morphology, which argues against it being a blazar. The unusual spectrum of this quasar resembles the spectra of the quasars PG1407+265, SDSSJ1136+0242, and PKS1004+13 for which several possible explanations have been entertained.

KW - astro-ph

U2 - 10.1086/510129

DO - 10.1086/510129

M3 - Journal article

SN - 0004-637X

VL - 133

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 479

ER -

Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars

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