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quasar

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A LUMINOUS QUASAR AT REDSHIFT 7.642

Redazione
(AGENPARL) – GARCHING (GERMANY), gio 04 febbraio 2021 First Author: Wang, FeigeInstruments: ALMA_Band_6, ALMA_Bands, VIRCAMProgramIDs: 179.A-2010, 2019.A.00017.SBibCode: 2021ApJ…907L…1W 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 been found at......
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THE CGM AT COSMIC NOON WITH KCWI: OUTFLOWS FROM A STAR-FORMING GALAXY AT Z = 2.071

Redazione
(AGENPARL) – GARCHING (GERMANY), sab 23 gennaio 2021 First Author: Nielsen, Nikole M.Instruments: UVESProgramIDs: 079.A-0656, 081.A-0478BibCode: 2020ApJ…904..164N We present the first results from our “CGM at Cosmic Noon with KCWI” program to study gas flows in the circumgalactic medium (CGM) at z = 2─3. Combining the power of a high-resolution......
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DISENTANGLING THE MULTIPHASE CIRCUMGALACTIC MEDIUM SHARED BETWEEN A DWARF AND A MASSIVE STAR-FORMING GALAXY AT Z∼0.4

Redazione
(AGENPARL) – GARCHING (GERMANY), sab 23 gennaio 2021 First Author: Nateghi, HastiInstruments: UVESProgramIDs: 075.A-0841BibCode: 2021MNRAS.500.3987N The multiphase circumgalactic medium (CGM) arises within the complex environment around a galaxy, or collection of galaxies, and possibly originates from a wide range of physical mechanisms. In this paper, we attempt to disentangle the......
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CONSTRAINING THE GRAVITATIONAL LENSING OF Z ≳ 6 QUASARS FROM THEIR PROXIMITY ZONES

Redazione
(AGENPARL) – GARCHING (GERMANY), sab 23 gennaio 2021 First Author: Davies, Frederick B.Instruments: XSHOOTERProgramIDs: 096.A-0095BibCode: 2020ApJ…904L..32D Since their discovery 20 years ago, the observed luminosity function of z ≳ 6 quasars has been suspected to be biased by gravitational lensing. Apart from the recent discovery of UHS J0439+1634 at z......
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SEARCH FOR INTRINSIC NALS IN BAL/MINI-BAL QUASAR SPECTRA

Redazione
(AGENPARL) – GARCHING (GERMANY), ven 15 gennaio 2021 First Author: Itoh, DaisukeInstruments: UVESProgramIDs: 075.B-0190, 079.B-0469, 080.A-0482, 081.A-0334, 081.A-0479, 081.B-0285, 083.A-0042, 091.A-0018, 092.B-0574, 185.A-0745, 273.A-5020BibCode: 2020MNRAS.499.3094I Some fraction of narrow absorption lines (NALs) are physically associated to the quasar/host-galaxy materials (i.e. intrinsic NALs) like those of broad absorption lines (BALs) and......
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THE ROCKY ROAD TO QUIESCENCE: COMPACTION AND QUENCHING OF QUASAR HOST GALAXIES AT Z ∼ 2

Redazione
(AGENPARL) – GARCHING (GERMANY), gio 14 gennaio 2021 First Author: Stacey, H. R.Instruments: ALMA_Band_7, ALMA_BandsProgramIDs: 2012.1.00175.S, 2015.1.01309.S, 2017.1.01081.S, 2017.1.01368.S, 2018.1.01591.SBibCode: 2021MNRAS.500.3667S We resolve the host galaxies of seven gravitationally lensed quasars at redshift 1.5-2.8 using observations with the Atacama Large (sub)Millimetre Array. Using a visibility plane lens modelling technique, we......
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ASTRONOMERS DISCOVER MOST DISTANT QUASAR

Redazione
(AGENPARL) – ANN ARBOR (MICHIGAN), mer 13 gennaio 2021 A team of astronomers including a University of Michigan researcher has observed a luminous quasar 13.03 billion light-years from Earth—the most distant quasar discovered to date. The quasar—a luminous object with a supermassive black hole at the center—sheds light on how......
Agenparl English Ambiente Educazione Scienza e Tecnologia Social Network Storie e Curiosità

QUASAR DISCOVERY SETS NEW DISTANCE RECORD

Redazione
(AGENPARL) – CHARLOTTESVILLE (VIRGINIA), mar 12 gennaio 2021 An international team of astronomers has discovered the most distant quasar yet found — a cosmic monster more than 13 billion light-years from Earth powered by a supermassive black hole more than 1.6 billion times more massive than the Sun and more......
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KILOPARSEC-SCALE ALMA IMAGING OF [C II] AND DUST CONTINUUM EMISSION OF 27 QUASAR HOST GALAXIES AT Z ∼ 6

Redazione
(AGENPARL) – GARCHING (GERMANY), mer 23 dicembre 2020 First Author: Venemans, Bram P.Instruments: ALMA_Band_6, ALMA_BandsProgramIDs: 2012.1.00240.S, 2012.1.00882.S, 2013.1.00273.S, 2015.1.00399.S, 2015.1.00692.S, 2016.1.00544.S, 2016.A.00018.S, 2017.1.00396.S, 2017.1.01301.S, 2018.1.00908.SBibCode: 2020ApJ…904..130V We present a study of the [C II] 158 μm line and underlying far-infrared (FIR) continuum emission of 27 quasar host galaxies at z......
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THREE LYα EMITTING GALAXIES WITHIN A QUASAR PROXIMITY ZONE AT Z ∼ 5.8

Redazione
(AGENPARL) – GARCHING (GERMANY), dom 20 dicembre 2020 First Author: Bosman, Sarah E. I.Instruments: XSHOOTERProgramIDs: 084.A-0390BibCode: 2020ApJ…896…49B Quasar proximity zones at $zgt 5.5$ correspond to overdense and overionized environments. Galaxies found inside proximity zones can therefore display features that would otherwise be masked by absorption in the intergalactic medium. We......

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