Enhanced X-Ray Emission from the Most Radio-powerful Quasar in the Universe’s First Billion Years
We present deep (265 ks) Chandra X-ray observations of PSO J352.4034−15.3373, a quasar at z = 5.831 that, with a radio-to-optical flux ratio of R > 1000, is one of the radio-loudest quasars in the early universe and is the only quasar with observed extended radio jets of kiloparsec scale at z ≳ 6...
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| Veröffentlicht in: | The Astrophysical journal 2021-04, Vol.911 (2), p.120 |
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| creator | Connor, Thomas Bañados, Eduardo Stern, Daniel Carilli, Chris Fabian, Andrew Momjian, Emmanuel Rojas-Ruiz, Sofía Decarli, Roberto Farina, Emanuele Paolo Mazzucchelli, Chiara Earnshaw, Hannah P. |
| description | We present deep (265 ks) Chandra X-ray observations of PSO J352.4034−15.3373, a quasar at
z
= 5.831 that, with a radio-to-optical flux ratio of
R
> 1000, is one of the radio-loudest quasars in the early universe and is the only quasar with observed extended radio jets of kiloparsec scale at
z
≳ 6. Modeling the X-ray spectrum of the quasar with a power law, we find a best fit of
Γ
=
1.99
−
0.28
+
0.29
, leading to an X-ray luminosity of
L
2
–
10
=
1.26
−
0.33
+
0.45
×
10
45
erg
s
−
1
and an X-ray to UV brightness ratio of
α
OX
= −1.45 ± −0.11. We identify a diffuse structure 50 kpc (∼8″) to the NW of the quasar along the jet axis that corresponds to a 3
σ
enhancement in the angular density of emission and can be ruled out as a background fluctuation with a probability of
P
= 0.9985. While with few detected photons the spectral fit of the structure is uncertain, we find that it has a luminosity of
L
2–10
∼ 10
44
erg s
−1
. These observations therefore potentially represent the most distant quasar jet yet seen in X-rays. We find no evidence for excess X-ray emission where the previously reported radio jets are seen (which have an overall linear extent of 0.″28), and a bright X-ray point source located along the jet axis to the SE is revealed by optical and NIR imaging to not be associated with the quasar. |
| doi_str_mv | 10.3847/1538-4357/abe710 |
| format | Article |
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z
= 5.831 that, with a radio-to-optical flux ratio of
R
> 1000, is one of the radio-loudest quasars in the early universe and is the only quasar with observed extended radio jets of kiloparsec scale at
z
≳ 6. Modeling the X-ray spectrum of the quasar with a power law, we find a best fit of
Γ
=
1.99
−
0.28
+
0.29
, leading to an X-ray luminosity of
L
2
–
10
=
1.26
−
0.33
+
0.45
×
10
45
erg
s
−
1
and an X-ray to UV brightness ratio of
α
OX
= −1.45 ± −0.11. We identify a diffuse structure 50 kpc (∼8″) to the NW of the quasar along the jet axis that corresponds to a 3
σ
enhancement in the angular density of emission and can be ruled out as a background fluctuation with a probability of
P
= 0.9985. While with few detected photons the spectral fit of the structure is uncertain, we find that it has a luminosity of
L
2–10
∼ 10
44
erg s
−1
. These observations therefore potentially represent the most distant quasar jet yet seen in X-rays. We find no evidence for excess X-ray emission where the previously reported radio jets are seen (which have an overall linear extent of 0.″28), and a bright X-ray point source located along the jet axis to the SE is revealed by optical and NIR imaging to not be associated with the quasar.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/abe710</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; Emission ; Jets ; Luminosity ; Point sources ; Quasars ; Radio jets (astronomy) ; Radio loud quasars ; Universe ; X ray spectra ; X-ray astronomy ; X-ray emissions ; X-ray quasars ; X-rays</subject><ispartof>The Astrophysical journal, 2021-04, Vol.911 (2), p.120</ispartof><rights>2021. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Apr 01, 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c380t-c53a9459f818bb20eb02b619362cb2ebbe5c7805ae07bc14d0414b8c88759dce3</citedby><cites>FETCH-LOGICAL-c380t-c53a9459f818bb20eb02b619362cb2ebbe5c7805ae07bc14d0414b8c88759dce3</cites><orcidid>0000-0001-5857-5622 ; 0000-0003-3168-5922 ; 0000-0002-2662-8803 ; 0000-0002-6822-2254 ; 0000-0002-9378-4072 ; 0000-0002-2931-7824 ; 0000-0002-7898-7664 ; 0000-0002-5941-5214 ; 0000-0003-2686-9241 ; 0000-0001-6647-3861 ; 0000-0003-2349-9310</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/abe710/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,776,780,27903,27904,38869,53845</link.rule.ids><linktorsrc>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/abe710$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc></links><search><creatorcontrib>Connor, Thomas</creatorcontrib><creatorcontrib>Bañados, Eduardo</creatorcontrib><creatorcontrib>Stern, Daniel</creatorcontrib><creatorcontrib>Carilli, Chris</creatorcontrib><creatorcontrib>Fabian, Andrew</creatorcontrib><creatorcontrib>Momjian, Emmanuel</creatorcontrib><creatorcontrib>Rojas-Ruiz, Sofía</creatorcontrib><creatorcontrib>Decarli, Roberto</creatorcontrib><creatorcontrib>Farina, Emanuele Paolo</creatorcontrib><creatorcontrib>Mazzucchelli, Chiara</creatorcontrib><creatorcontrib>Earnshaw, Hannah P.</creatorcontrib><title>Enhanced X-Ray Emission from the Most Radio-powerful Quasar in the Universe’s First Billion Years</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>We present deep (265 ks) Chandra X-ray observations of PSO J352.4034−15.3373, a quasar at
z
= 5.831 that, with a radio-to-optical flux ratio of
R
> 1000, is one of the radio-loudest quasars in the early universe and is the only quasar with observed extended radio jets of kiloparsec scale at
z
≳ 6. Modeling the X-ray spectrum of the quasar with a power law, we find a best fit of
Γ
=
1.99
−
0.28
+
0.29
, leading to an X-ray luminosity of
L
2
–
10
=
1.26
−
0.33
+
0.45
×
10
45
erg
s
−
1
and an X-ray to UV brightness ratio of
α
OX
= −1.45 ± −0.11. We identify a diffuse structure 50 kpc (∼8″) to the NW of the quasar along the jet axis that corresponds to a 3
σ
enhancement in the angular density of emission and can be ruled out as a background fluctuation with a probability of
P
= 0.9985. While with few detected photons the spectral fit of the structure is uncertain, we find that it has a luminosity of
L
2–10
∼ 10
44
erg s
−1
. These observations therefore potentially represent the most distant quasar jet yet seen in X-rays. We find no evidence for excess X-ray emission where the previously reported radio jets are seen (which have an overall linear extent of 0.″28), and a bright X-ray point source located along the jet axis to the SE is revealed by optical and NIR imaging to not be associated with the quasar.</description><subject>Astrophysics</subject><subject>Emission</subject><subject>Jets</subject><subject>Luminosity</subject><subject>Point sources</subject><subject>Quasars</subject><subject>Radio jets (astronomy)</subject><subject>Radio loud quasars</subject><subject>Universe</subject><subject>X ray spectra</subject><subject>X-ray astronomy</subject><subject>X-ray emissions</subject><subject>X-ray quasars</subject><subject>X-rays</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp9kE9LwzAYh4MoOKd3jwHxZl3-tEt6VNlUmIjDwTyFJE1ZRtfUpFV282v49fwktlb0Ip5e3pfn93vhAeAYo3PKYzbCCeVRTBM2ksowjHbA4Oe0CwYIoTgaU7bcBwchrLuVpOkA6Em5kqU2GVxGc7mFk40NwboS5t5tYL0y8M6FGs5lZl1UuVfj86aAD40M0kNbfhGL0r4YH8zH23uAU-tb_tIWRdfyZKQPh2Avl0UwR99zCBbTyePVTTS7v769uphFmnJURzqhMo2TNOeYK0WQUYioMU7pmGhFjFIm0YyjRBrElMZxhmIcK645Z0maaUOH4KTvrbx7bkyoxdo1vmxfCpJgzhiKEW8p1FPauxC8yUXl7Ub6rcBIdCpF50103kSvso2c9RHrqt_Of_DTP3BZrUWKsSACEySqLKefmaOCfA</recordid><startdate>20210401</startdate><enddate>20210401</enddate><creator>Connor, Thomas</creator><creator>Bañados, Eduardo</creator><creator>Stern, Daniel</creator><creator>Carilli, Chris</creator><creator>Fabian, Andrew</creator><creator>Momjian, Emmanuel</creator><creator>Rojas-Ruiz, Sofía</creator><creator>Decarli, Roberto</creator><creator>Farina, Emanuele Paolo</creator><creator>Mazzucchelli, Chiara</creator><creator>Earnshaw, Hannah P.</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-5857-5622</orcidid><orcidid>https://orcid.org/0000-0003-3168-5922</orcidid><orcidid>https://orcid.org/0000-0002-2662-8803</orcidid><orcidid>https://orcid.org/0000-0002-6822-2254</orcidid><orcidid>https://orcid.org/0000-0002-9378-4072</orcidid><orcidid>https://orcid.org/0000-0002-2931-7824</orcidid><orcidid>https://orcid.org/0000-0002-7898-7664</orcidid><orcidid>https://orcid.org/0000-0002-5941-5214</orcidid><orcidid>https://orcid.org/0000-0003-2686-9241</orcidid><orcidid>https://orcid.org/0000-0001-6647-3861</orcidid><orcidid>https://orcid.org/0000-0003-2349-9310</orcidid></search><sort><creationdate>20210401</creationdate><title>Enhanced X-Ray Emission from the Most Radio-powerful Quasar in the Universe’s First Billion Years</title><author>Connor, Thomas ; Bañados, Eduardo ; Stern, Daniel ; Carilli, Chris ; Fabian, Andrew ; Momjian, Emmanuel ; Rojas-Ruiz, Sofía ; Decarli, Roberto ; Farina, Emanuele Paolo ; Mazzucchelli, Chiara ; Earnshaw, Hannah P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-c53a9459f818bb20eb02b619362cb2ebbe5c7805ae07bc14d0414b8c88759dce3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Astrophysics</topic><topic>Emission</topic><topic>Jets</topic><topic>Luminosity</topic><topic>Point sources</topic><topic>Quasars</topic><topic>Radio jets (astronomy)</topic><topic>Radio loud quasars</topic><topic>Universe</topic><topic>X ray spectra</topic><topic>X-ray astronomy</topic><topic>X-ray emissions</topic><topic>X-ray quasars</topic><topic>X-rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Connor, Thomas</creatorcontrib><creatorcontrib>Bañados, Eduardo</creatorcontrib><creatorcontrib>Stern, Daniel</creatorcontrib><creatorcontrib>Carilli, Chris</creatorcontrib><creatorcontrib>Fabian, Andrew</creatorcontrib><creatorcontrib>Momjian, Emmanuel</creatorcontrib><creatorcontrib>Rojas-Ruiz, Sofía</creatorcontrib><creatorcontrib>Decarli, Roberto</creatorcontrib><creatorcontrib>Farina, Emanuele Paolo</creatorcontrib><creatorcontrib>Mazzucchelli, Chiara</creatorcontrib><creatorcontrib>Earnshaw, Hannah P.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Connor, Thomas</au><au>Bañados, Eduardo</au><au>Stern, Daniel</au><au>Carilli, Chris</au><au>Fabian, Andrew</au><au>Momjian, Emmanuel</au><au>Rojas-Ruiz, Sofía</au><au>Decarli, Roberto</au><au>Farina, Emanuele Paolo</au><au>Mazzucchelli, Chiara</au><au>Earnshaw, Hannah P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enhanced X-Ray Emission from the Most Radio-powerful Quasar in the Universe’s First Billion Years</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2021-04-01</date><risdate>2021</risdate><volume>911</volume><issue>2</issue><spage>120</spage><pages>120-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We present deep (265 ks) Chandra X-ray observations of PSO J352.4034−15.3373, a quasar at
z
= 5.831 that, with a radio-to-optical flux ratio of
R
> 1000, is one of the radio-loudest quasars in the early universe and is the only quasar with observed extended radio jets of kiloparsec scale at
z
≳ 6. Modeling the X-ray spectrum of the quasar with a power law, we find a best fit of
Γ
=
1.99
−
0.28
+
0.29
, leading to an X-ray luminosity of
L
2
–
10
=
1.26
−
0.33
+
0.45
×
10
45
erg
s
−
1
and an X-ray to UV brightness ratio of
α
OX
= −1.45 ± −0.11. We identify a diffuse structure 50 kpc (∼8″) to the NW of the quasar along the jet axis that corresponds to a 3
σ
enhancement in the angular density of emission and can be ruled out as a background fluctuation with a probability of
P
= 0.9985. While with few detected photons the spectral fit of the structure is uncertain, we find that it has a luminosity of
L
2–10
∼ 10
44
erg s
−1
. These observations therefore potentially represent the most distant quasar jet yet seen in X-rays. We find no evidence for excess X-ray emission where the previously reported radio jets are seen (which have an overall linear extent of 0.″28), and a bright X-ray point source located along the jet axis to the SE is revealed by optical and NIR imaging to not be associated with the quasar.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/abe710</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0001-5857-5622</orcidid><orcidid>https://orcid.org/0000-0003-3168-5922</orcidid><orcidid>https://orcid.org/0000-0002-2662-8803</orcidid><orcidid>https://orcid.org/0000-0002-6822-2254</orcidid><orcidid>https://orcid.org/0000-0002-9378-4072</orcidid><orcidid>https://orcid.org/0000-0002-2931-7824</orcidid><orcidid>https://orcid.org/0000-0002-7898-7664</orcidid><orcidid>https://orcid.org/0000-0002-5941-5214</orcidid><orcidid>https://orcid.org/0000-0003-2686-9241</orcidid><orcidid>https://orcid.org/0000-0001-6647-3861</orcidid><orcidid>https://orcid.org/0000-0003-2349-9310</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | The Astrophysical journal, 2021-04, Vol.911 (2), p.120 |
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| language | eng |
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| subjects | Astrophysics Emission Jets Luminosity Point sources Quasars Radio jets (astronomy) Radio loud quasars Universe X ray spectra X-ray astronomy X-ray emissions X-ray quasars X-rays |
| title | Enhanced X-Ray Emission from the Most Radio-powerful Quasar in the Universe’s First Billion Years |
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