Abstract
We present low-resolution ultraviolet spectra of 14 low-redshift (z em ≲ 0.8) quasars observed with the Hubble Space Telescope STIS as part of a Snapshot project to understand the relationship between quasar outflows and luminosity. By design, all observations cover the C IV emission line. Ten of the quasars are from the Hamburg-ESO catalog, three are from the Palomar-Green catalog, and one is from the Parkes catalog. The sample contains a few interesting quasars, including two broad absorption line (BAL) quasars (HE 0143-3535 and HE 0436-2614), one quasar with a mini-BAL (HE 1105-0746), and one quasar with associated narrow absorption (HE 0409-5004). These BAL quasars are among the brightest known (although not the most luminous) since they lie at zem <0.8. We compare the properties of these BAL quasars to the zem <0.5 Palomar-Green and zem > 1-4 Large Bright Quasar Survey samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the v ∼ L0.62 relation derived by Laor & Brandt (2002). Another quasar, HE 0441-2826, 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 PG 1407+265, SDSS J1136+0242, and PKS 1004+13, for which several possible explanations have been entertained.
| Original language | English |
|---|---|
| Pages (from-to) | 479-486 |
| Number of pages | 8 |
| Journal | Astronomical Journal |
| Volume | 133 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2007 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Space and Planetary Science
- Astronomy and Astrophysics
Cite this
Hubble space telescope ultraviolet spectroscopy of 14 low-redshift quasars. / Ganguly, Rajib; Brotherton, Michael S.; Arav, Nahum; Heap, Sara R.; Wisotzki, Lutz; Aldcroft, Thomas L.; Alloin, Danielle; Behar, Ehud; Canalizo, Gabriela; Michael Crenshaw, D.; De Kool, Martijn; Chambers, Kenneth; Cecil, Gerald; Chatzichristou, Eleni; Evererr, John; Gabel, Jack; Martin Gaskell, C.; Galliano, Emmanuel; Green, Richard F.; Hall, Patrick B.; Hines, Dean C.; Junkkarinen, Vesa T.; Kaastra, Jelle S.; Kaiser, Mary Elizabeth; Kazanas, Demosthenes; Konigl, Arieh; Korista, Kirk T.; Kriss, Gerard A.; Laor, Ari; Leighly, Karen M.; Mathur, Smita; Ogle, Patrick; Proga, Daniel; Sabra, Bassem; Sivron, Ran; Snedden, Stephanie; Telfer, Randal; Vestergaard, Marianne.
In: Astronomical Journal, Vol. 133, No. 2, 02.2007, p. 479-486.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hubble space telescope ultraviolet spectroscopy of 14 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 - Michael Crenshaw, D.
AU - De Kool, Martijn
AU - Chambers, Kenneth
AU - Cecil, Gerald
AU - Chatzichristou, Eleni
AU - Evererr, John
AU - Gabel, Jack
AU - Martin Gaskell, C.
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 - 2007/2
Y1 - 2007/2
N2 - We present low-resolution ultraviolet spectra of 14 low-redshift (z em ≲ 0.8) quasars observed with the Hubble Space Telescope STIS as part of a Snapshot project to understand the relationship between quasar outflows and luminosity. By design, all observations cover the C IV emission line. Ten of the quasars are from the Hamburg-ESO catalog, three are from the Palomar-Green catalog, and one is from the Parkes catalog. The sample contains a few interesting quasars, including two broad absorption line (BAL) quasars (HE 0143-3535 and HE 0436-2614), one quasar with a mini-BAL (HE 1105-0746), and one quasar with associated narrow absorption (HE 0409-5004). These BAL quasars are among the brightest known (although not the most luminous) since they lie at zem <0.8. We compare the properties of these BAL quasars to the zem <0.5 Palomar-Green and zem > 1-4 Large Bright Quasar Survey samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the v ∼ L0.62 relation derived by Laor & Brandt (2002). Another quasar, HE 0441-2826, 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 PG 1407+265, SDSS J1136+0242, and PKS 1004+13, for which several possible explanations have been entertained.
AB - We present low-resolution ultraviolet spectra of 14 low-redshift (z em ≲ 0.8) quasars observed with the Hubble Space Telescope STIS as part of a Snapshot project to understand the relationship between quasar outflows and luminosity. By design, all observations cover the C IV emission line. Ten of the quasars are from the Hamburg-ESO catalog, three are from the Palomar-Green catalog, and one is from the Parkes catalog. The sample contains a few interesting quasars, including two broad absorption line (BAL) quasars (HE 0143-3535 and HE 0436-2614), one quasar with a mini-BAL (HE 1105-0746), and one quasar with associated narrow absorption (HE 0409-5004). These BAL quasars are among the brightest known (although not the most luminous) since they lie at zem <0.8. We compare the properties of these BAL quasars to the zem <0.5 Palomar-Green and zem > 1-4 Large Bright Quasar Survey samples. By design, our objects sample luminosities in between these two surveys, and our four absorbed objects are consistent with the v ∼ L0.62 relation derived by Laor & Brandt (2002). Another quasar, HE 0441-2826, 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 PG 1407+265, SDSS J1136+0242, and PKS 1004+13, for which several possible explanations have been entertained.
UR - http://www.scopus.com/inward/record.url?scp=33847406218&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33847406218&partnerID=8YFLogxK
U2 - 10.1086/510129
DO - 10.1086/510129
M3 - Article
VL - 133
SP - 479
EP - 486
JO - Astronomical Journal
JF - Astronomical Journal
SN - 0004-6256
IS - 2
ER -