An 800-million-solar-mass black hole in a significantly neutral Universe at a redshift of 7.5
@article{Baados2018An8B, title={An 800-million-solar-mass black hole in a significantly neutral Universe at a redshift of 7.5}, author={Eduardo Ba{\~n}ados and Bram P. Venemans and Chiara Mazzucchelli and Emanuele Paolo Farina and Fabian Walter and Feige Wang and Roberto Decarli and Daniel Stern and Xiaohui Fan and Frederick B. Davies and Joseph F. Hennawi and Robert A. Simcoe and Monica L. Turner and Hans-Walter Rix and Jinyi Yang and Daniel D. Kelson and Gwen C. Rudie and Jack M. Winters}, journal={Nature}, year={2018}, volume={553}, pages={473-476} }
Quasars are the most luminous non-transient objects known and as a result they enable studies of the Universe at the earliest cosmic epochs. Despite extensive efforts, however, the quasar ULAS J1120 + 0641 at redshift z = 7.09 has remained the only one known at z > 7 for more than half a decade. Here we report observations of the quasar ULAS J134208.10 + 092838.61 (hereafter J1342 + 0928) at redshift z = 7.54. This quasar has a bolometric luminosity of 4 × 1013 times the luminosity of the Sun…
503 Citations
Probing Early Supermassive Black Hole Growth and Quasar Evolution with Near-infrared Spectroscopy of 37 Reionization-era Quasars at 6.3 < z ≤ 7.64
- PhysicsThe Astrophysical Journal
- 2021
We report the results of near-infrared spectroscopic observations of 37 quasars in the redshift range 6.3 < z ≤ 7.64, including 32 quasars at z > 6.5, forming the largest quasar near-infrared…
The Discovery of a Highly Accreting, Radio-loud Quasar at z = 6.82
- Physics
- 2021
Radio sources at the highest redshifts can provide unique information on the first massive galaxies and black holes, the densest primordial environments, and the epoch of reionization. The number of…
Rapid black hole growth at the dawn of the Universe: a super-Eddington quasar atz = 6.6
- PhysicsMonthly Notices of the Royal Astronomical Society
- 2019
We present the analysis of a new near-infrared (NIR) spectrum of a recently discovered z = 6.621 quasar PSO J006 + 39 in an attempt to explore the early growth of supermassive black holes (SMBHs).…
Evidence for Low Radiative Efficiency or Highly Obscured Growth of z > 7 Quasars
- PhysicsThe Astrophysical Journal
- 2019
The supermassive black holes (SMBHs) observed at the centers of all massive galaxies are believed to have grown via luminous accretion during quasar phases in the distant past. The fraction of…
A thirty-four billion solar mass black hole in SMSS J2157–3602, the most luminous known quasar
- PhysicsMonthly Notices of the Royal Astronomical Society
- 2020
From near-infrared spectroscopic measurements of the Mg ii emission line doublet, we estimate the black hole (BH) mass of the quasar, SMSS J215728.21–360215.1, as being (3.4 ± 0.6) × 1010 M⊙ and…
A Luminous Quasar at Redshift 7.642
- Physics
- 2021
Distant quasars are unique tracers to study the formation of the earliest supermassive black holes (SMBHs) and the history of cosmic reionization. Despite extensive efforts, only two quasars have…
A tiny host galaxy for the first giant black hole:z = 7.5 quasar in BlueTides
- PhysicsMonthly Notices of the Royal Astronomical Society
- 2018
The most distant known quasar recently discovered by Banados et al. (2018) is at z=7.5 (690 Myr after the Big Bang), at the dawn of galaxy formation. We explore the host galaxy of the brightest…
Conditions for Direct Black Hole Seed Collapse near a Radio-loud Quasar 1 Gyr after the Big Bang
- PhysicsThe Astrophysical Journal
- 2022
Observations of luminous quasars and their supermassive black holes at z ≳ 6 suggest that they formed at dense matter peaks in the early universe. However, few studies have found definitive evidence…
A dusty compact object bridging galaxies and quasars at cosmic dawn.
- PhysicsNature
- 2022
Understanding how super-massive black holes form and grow in the early Universe has become a major challenge1,2 since it was discovered that luminous quasars existed only 700 million years after the…
Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). VI. Black Hole Mass Measurements of Six Quasars at 6.1 ≤ z ≤ 6.7
- PhysicsThe Astrophysical Journal
- 2019
We present deep near-infrared spectroscopy of six quasars at 6.1 5.8 quasars with measured black hole masses. From single-epoch mass measurements based on MgII {\lambda}2798, we find a wide range in…
References
SHOWING 1-10 OF 44 REFERENCES
An ultraluminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
- PhysicsNature
- 2015
The discovery of an ultraluminous quasar, SDSS J010013.02+280225.8, at redshift z = 6.30, which has an optical and near-infrared luminosity a few times greater than those of previously known z > 6 quasars.
A luminous quasar at a redshift of z = 7.085
- PhysicsNature
- 2011
Observations of a quasar at a redshift of 7.3 are reported, suggesting that the neutral fraction of the intergalactic medium in front of ULAS J1120+0641 exceeded 0.1.
Extremely metal-poor gas at a redshift of 7
- PhysicsNature
- 2012
Observations of hydrogen and heavy-element absorption in a spectrum of a quasar at z = 7.04 imply that the Universe was neither ionized by starlight nor chemically enriched in this neighbourhood at z, and the inferred abundance is too low to promote efficient cooling.
How neutral is the intergalactic medium surrounding the redshift z = 7.085 quasar ULAS J1120+0641?
- Physics
- 2011
The quasar ULAS J1120+0641 at redshift z = 7.085 has a highly ionized near zone which is smaller than those around quasars of similar luminosity at z ≃ 6. The spectrum also exhibits evidence for a…
Copious Amounts of Dust and Gas in a z=7.5 Quasar Host Galaxy
- Physics
- 2017
We present IRAM/NOEMA and JVLA observations of the quasar J1342+0928 at z=7.54 and report detections of copious amounts of dust and [CII] emission in the interstellar medium (ISM) of its host galaxy.…
Bright [CII] and dust emission in three z>6.6 quasar host galaxies observed by ALMA
- Physics
- 2015
We present ALMA detections of the [CII] 158 micron emission line and the underlying far-infrared continuum of three quasars at 6.6 ~6 quasar hosts correlate with the quasar's bolometric luminosity.…
The effect of nuclear gas distribution on the mass determination of supermassive black holes
- Physics
- 2017
Supermassive black holes reside in the nuclei of most galaxies. During their active episodes, black holes are powered by accretion discs where gravitational energy is converted into radiation1.…
The Pan-STARRS1 Distant z > 5.6 Quasar Survey: More than 100 Quasars within the First Gyr of the Universe
- Physics
- 2016
Luminous quasars at z > 5.6 can be studied in detail with the current generation of telescopes and provide us with unique information on the first gigayear of the universe. Thus far, these studies…
Evidence of patchy hydrogen reionization from an extreme Lyα trough below redshift six
- Physics
- 2015
We report the discovery of an extremely long (∼110 Mpc/h) and dark (τeff≳7) Lyα trough extending down to z≃5.5 towards the zem≃6.0 quasar ULAS J0148+0600. We use these new data in combination with…
MASS FUNCTIONS OF THE ACTIVE BLACK HOLES IN DISTANT QUASARS FROM THE LARGE BRIGHT QUASAR SURVEY, THE BRIGHT QUASAR SURVEY, AND THE COLOR-SELECTED SAMPLE OF THE SDSS FALL EQUATORIAL STRIPE.
- Physics
- 2009
We present mass functions of distant actively accreting supermassive black holes residing in luminous quasars discovered in the Large Bright Quasar Survey (LBQS), the Bright Quasar Survey (BQS), and…