Abstract
Despite extensive efforts, to date only two quasars have been found at z > 7, due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool dwarfs in quasar selection. This limits our current knowledge of the super-massive black hole growth mechanism and reionization history. In this Letter, we report the discovery of a luminous quasar at z = 7.021, DELS J003836.10-152723.6 (hereafter J0038-1527), selected using photometric data from Dark Energy Spectroscopic Instrument Legacy Imaging Survey, Pan-STARRS1 (PS1) imaging Survey, as well as Wide-field Infrared Survey Explore mid-infrared all-sky survey. With an absolute magnitude of M 1450 = -27.1 and bolometric luminosity of L Bol = 5.6 - 1013 L o, J0038-1527 is the most luminous quasar known at z > 7. Deep optical to near-infrared spectroscopic observations suggest that J0038-1527 hosts a 1.3 billion solar mass black hole accreting at the Eddington limit, with an Eddington ratio of 1.25 - 0.19. The C iv broad emission line of J0038-1527 is blueshifted by more than 3000 km s-1 relative to the quasar systemic redshift. More detailed investigations of the high-quality spectra reveal three extremely high-velocity C iv broad absorption lines with velocity from 0.08 to 0.14 times the speed of light and total "balnicity" index of more than 5000 km s-1, suggesting the presence of relativistic outflows. J0038-1527 is the first quasar found at the epoch of reionization with such strong outflows, and therefore provides a unique laboratory to investigate active galactic nuclei feedback on the formation and growth of the most massive galaxies in the early universe.
| Original language | English (US) |
|---|---|
| Article number | L9 |
| Journal | Astrophysical Journal Letters |
| Volume | 869 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 10 2018 |
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Keywords
- cosmology: observations
- early universe
- galaxies: active
- galaxies: high-redshift
- quasars: individual (J0038-1527)
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
Cite this
The Discovery of a Luminous Broad Absorption Line Quasar at a Redshift of 7.02. / Wang, Feige; Yang, Jinyi; Fan, Xiaohui; Yue, Minghao; Wu, Xue Bing; Schindler, Jan Torge; Bian, Fuyan; Li, Jiang Tao; Farina, Emanuele P.; Bañados, Eduardo; Davies, Frederick B.; Decarli, Roberto; Green, Richard; Jiang, Linhua; Hennawi, Joseph F.; Huang, Yun Hsin; Mazzucchelli, Chiara; McGreer, Ian D.; Venemans, Bram; Walter, Fabian; Beletsky, Yuri.
In: Astrophysical Journal Letters, Vol. 869, No. 1, L9, 10.12.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The Discovery of a Luminous Broad Absorption Line Quasar at a Redshift of 7.02
AU - Wang, Feige
AU - Yang, Jinyi
AU - Fan, Xiaohui
AU - Yue, Minghao
AU - Wu, Xue Bing
AU - Schindler, Jan Torge
AU - Bian, Fuyan
AU - Li, Jiang Tao
AU - Farina, Emanuele P.
AU - Bañados, Eduardo
AU - Davies, Frederick B.
AU - Decarli, Roberto
AU - Green, Richard
AU - Jiang, Linhua
AU - Hennawi, Joseph F.
AU - Huang, Yun Hsin
AU - Mazzucchelli, Chiara
AU - McGreer, Ian D.
AU - Venemans, Bram
AU - Walter, Fabian
AU - Beletsky, Yuri
PY - 2018/12/10
Y1 - 2018/12/10
N2 - Despite extensive efforts, to date only two quasars have been found at z > 7, due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool dwarfs in quasar selection. This limits our current knowledge of the super-massive black hole growth mechanism and reionization history. In this Letter, we report the discovery of a luminous quasar at z = 7.021, DELS J003836.10-152723.6 (hereafter J0038-1527), selected using photometric data from Dark Energy Spectroscopic Instrument Legacy Imaging Survey, Pan-STARRS1 (PS1) imaging Survey, as well as Wide-field Infrared Survey Explore mid-infrared all-sky survey. With an absolute magnitude of M 1450 = -27.1 and bolometric luminosity of L Bol = 5.6 - 1013 L o, J0038-1527 is the most luminous quasar known at z > 7. Deep optical to near-infrared spectroscopic observations suggest that J0038-1527 hosts a 1.3 billion solar mass black hole accreting at the Eddington limit, with an Eddington ratio of 1.25 - 0.19. The C iv broad emission line of J0038-1527 is blueshifted by more than 3000 km s-1 relative to the quasar systemic redshift. More detailed investigations of the high-quality spectra reveal three extremely high-velocity C iv broad absorption lines with velocity from 0.08 to 0.14 times the speed of light and total "balnicity" index of more than 5000 km s-1, suggesting the presence of relativistic outflows. J0038-1527 is the first quasar found at the epoch of reionization with such strong outflows, and therefore provides a unique laboratory to investigate active galactic nuclei feedback on the formation and growth of the most massive galaxies in the early universe.
AB - Despite extensive efforts, to date only two quasars have been found at z > 7, due to a combination of low spatial density and high contamination from more ubiquitous Galactic cool dwarfs in quasar selection. This limits our current knowledge of the super-massive black hole growth mechanism and reionization history. In this Letter, we report the discovery of a luminous quasar at z = 7.021, DELS J003836.10-152723.6 (hereafter J0038-1527), selected using photometric data from Dark Energy Spectroscopic Instrument Legacy Imaging Survey, Pan-STARRS1 (PS1) imaging Survey, as well as Wide-field Infrared Survey Explore mid-infrared all-sky survey. With an absolute magnitude of M 1450 = -27.1 and bolometric luminosity of L Bol = 5.6 - 1013 L o, J0038-1527 is the most luminous quasar known at z > 7. Deep optical to near-infrared spectroscopic observations suggest that J0038-1527 hosts a 1.3 billion solar mass black hole accreting at the Eddington limit, with an Eddington ratio of 1.25 - 0.19. The C iv broad emission line of J0038-1527 is blueshifted by more than 3000 km s-1 relative to the quasar systemic redshift. More detailed investigations of the high-quality spectra reveal three extremely high-velocity C iv broad absorption lines with velocity from 0.08 to 0.14 times the speed of light and total "balnicity" index of more than 5000 km s-1, suggesting the presence of relativistic outflows. J0038-1527 is the first quasar found at the epoch of reionization with such strong outflows, and therefore provides a unique laboratory to investigate active galactic nuclei feedback on the formation and growth of the most massive galaxies in the early universe.
KW - cosmology: observations
KW - early universe
KW - galaxies: active
KW - galaxies: high-redshift
KW - quasars: individual (J0038-1527)
UR - http://www.scopus.com/inward/record.url?scp=85058481567&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85058481567&partnerID=8YFLogxK
U2 - 10.3847/2041-8213/aaf1d2
DO - 10.3847/2041-8213/aaf1d2
M3 - Article
AN - SCOPUS:85058481567
VL - 869
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
SN - 2041-8205
IS - 1
M1 - L9
ER -