X-Ray Spectral Correlations in a Sample of Low-mass Black Hole X-Ray Binaries in the Hard State
The power-law emission and reflection component provide valuable insights into the accretion process around a black hole. In this work, thanks to the broadband spectra coverage of the Nuclear Spectroscopic Telescope Array, we study the spectral properties for a sample of low-mass black hole X-ray bi...
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| Veröffentlicht in: | The Astrophysical journal 2023-03, Vol.945 (1), p.65 |
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| creator | You, Bei Dong, Yanting Yan, Zhen Liu, Zhu Tuo, Youli Yao, Yuanle Cao, Xinwu |
| description | The power-law emission and reflection component provide valuable insights into the accretion process around a black hole. In this work, thanks to the broadband spectra coverage of the Nuclear Spectroscopic Telescope Array, we study the spectral properties for a sample of low-mass black hole X-ray binaries (BHXRBs). We find that there is a positive correlation between the photon index Γ and the reflection fraction
R
(the ratio of the coronal intensity that illuminates the disk to the coronal intensity that reaches the observer), consistent with previous studies, but except for MAXI J1820+070. It is quite interesting that this source also deviates from the well-known “V”-shaped correlation between the photon index Γ and the X-ray luminosity
log
L
X
, when it is in the bright hard state. More specifically, the Λ-shaped correlation between Γ and log
L
X
is observed, as the luminosity decreases by a factor of 3 in a narrow range from ∼10
38
to 10
37.5
erg s
−1
. Furthermore, we discover a strong positive correlation between
R
and the X-ray luminosity for BHXRBs in the hard state, which puts a constraint on the disk-corona coupling and the evolution. |
| doi_str_mv | 10.3847/1538-4357/acba11 |
| format | Article |
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R
(the ratio of the coronal intensity that illuminates the disk to the coronal intensity that reaches the observer), consistent with previous studies, but except for MAXI J1820+070. It is quite interesting that this source also deviates from the well-known “V”-shaped correlation between the photon index Γ and the X-ray luminosity
log
L
X
, when it is in the bright hard state. More specifically, the Λ-shaped correlation between Γ and log
L
X
is observed, as the luminosity decreases by a factor of 3 in a narrow range from ∼10
38
to 10
37.5
erg s
−1
. Furthermore, we discover a strong positive correlation between
R
and the X-ray luminosity for BHXRBs in the hard state, which puts a constraint on the disk-corona coupling and the evolution.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/acba11</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Accretion ; Astrophysics ; Black hole physics ; Black holes ; Broadband ; Corona ; Correlation ; Deposition ; Luminosity ; Photons ; Reflection ; Spectroscopic telescopes ; Stellar accretion disks ; X ray binaries ; X ray spectra ; X ray stars ; X-ray astronomy ; X-ray transient sources ; X-rays</subject><ispartof>The Astrophysical journal, 2023-03, Vol.945 (1), p.65</ispartof><rights>2023. The Author(s). Published by the American Astronomical Society.</rights><rights>2023. The Author(s). Published by the American Astronomical Society. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c445t-2f1a86e5e5bbe17454d8e7cf434516762365ddb5c6e9787e0ee6fa522ba7fbc23</citedby><cites>FETCH-LOGICAL-c445t-2f1a86e5e5bbe17454d8e7cf434516762365ddb5c6e9787e0ee6fa522ba7fbc23</cites><orcidid>0000-0003-3127-0110 ; 0000-0002-5385-9586 ; 0000-0002-8231-063X ; 0000-0003-3014-8762 ; 0000-0002-2355-3498</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/acba11/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,780,784,864,2102,27924,27925,38890,53867</link.rule.ids></links><search><creatorcontrib>You, Bei</creatorcontrib><creatorcontrib>Dong, Yanting</creatorcontrib><creatorcontrib>Yan, Zhen</creatorcontrib><creatorcontrib>Liu, Zhu</creatorcontrib><creatorcontrib>Tuo, Youli</creatorcontrib><creatorcontrib>Yao, Yuanle</creatorcontrib><creatorcontrib>Cao, Xinwu</creatorcontrib><title>X-Ray Spectral Correlations in a Sample of Low-mass Black Hole X-Ray Binaries in the Hard State</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>The power-law emission and reflection component provide valuable insights into the accretion process around a black hole. In this work, thanks to the broadband spectra coverage of the Nuclear Spectroscopic Telescope Array, we study the spectral properties for a sample of low-mass black hole X-ray binaries (BHXRBs). We find that there is a positive correlation between the photon index Γ and the reflection fraction
R
(the ratio of the coronal intensity that illuminates the disk to the coronal intensity that reaches the observer), consistent with previous studies, but except for MAXI J1820+070. It is quite interesting that this source also deviates from the well-known “V”-shaped correlation between the photon index Γ and the X-ray luminosity
log
L
X
, when it is in the bright hard state. More specifically, the Λ-shaped correlation between Γ and log
L
X
is observed, as the luminosity decreases by a factor of 3 in a narrow range from ∼10
38
to 10
37.5
erg s
−1
. Furthermore, we discover a strong positive correlation between
R
and the X-ray luminosity for BHXRBs in the hard state, which puts a constraint on the disk-corona coupling and the evolution.</description><subject>Accretion</subject><subject>Astrophysics</subject><subject>Black hole physics</subject><subject>Black holes</subject><subject>Broadband</subject><subject>Corona</subject><subject>Correlation</subject><subject>Deposition</subject><subject>Luminosity</subject><subject>Photons</subject><subject>Reflection</subject><subject>Spectroscopic telescopes</subject><subject>Stellar accretion disks</subject><subject>X ray binaries</subject><subject>X ray spectra</subject><subject>X ray stars</subject><subject>X-ray astronomy</subject><subject>X-ray transient sources</subject><subject>X-rays</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>DOA</sourceid><recordid>eNp1kc1P3DAQxa0KpC7Qe4-W4NhA7PgrR3ZFWaSVKnVB4mZNnDFkya5TOwjx3zchaLnAZax5eu831gwhP1l-XhihL5gsTCYKqS_AVcDYNzLbSwdklue5yFSh77-To5Q2Y8vLckbsffYXXum6Q9dHaOkixIgt9E3YJdrsKNA1bLsWafB0FV6yLaRE5y24J7oMgzzF580OYoNvif4R6RJiTdc99HhCDj20CX-8v8fk7vfV7WKZrf5c3ywuV5kTQvYZ9wyMQomyqpBpIUVtUDsvCiGZ0ooXStZ1JZ3CUhuNOaLyIDmvQPvK8eKY3EzcOsDGdrHZQny1ARr7JoT4YCH2jWvRclky5NwYpbkApWGo6I2okGupFAys04nVxfDvGVNvN-E57obvW66NMKZURTm48snlYkgpot9PZbkdT2LH_dtx_3Y6yRA5myJN6D6Y0G1sKaRlVknb1X6w_frE9iX1Pxgpl50</recordid><startdate>20230301</startdate><enddate>20230301</enddate><creator>You, Bei</creator><creator>Dong, Yanting</creator><creator>Yan, Zhen</creator><creator>Liu, Zhu</creator><creator>Tuo, Youli</creator><creator>Yao, Yuanle</creator><creator>Cao, Xinwu</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0003-3127-0110</orcidid><orcidid>https://orcid.org/0000-0002-5385-9586</orcidid><orcidid>https://orcid.org/0000-0002-8231-063X</orcidid><orcidid>https://orcid.org/0000-0003-3014-8762</orcidid><orcidid>https://orcid.org/0000-0002-2355-3498</orcidid></search><sort><creationdate>20230301</creationdate><title>X-Ray Spectral Correlations in a Sample of Low-mass Black Hole X-Ray Binaries in the Hard State</title><author>You, Bei ; Dong, Yanting ; Yan, Zhen ; Liu, Zhu ; Tuo, Youli ; Yao, Yuanle ; Cao, Xinwu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c445t-2f1a86e5e5bbe17454d8e7cf434516762365ddb5c6e9787e0ee6fa522ba7fbc23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Accretion</topic><topic>Astrophysics</topic><topic>Black hole physics</topic><topic>Black holes</topic><topic>Broadband</topic><topic>Corona</topic><topic>Correlation</topic><topic>Deposition</topic><topic>Luminosity</topic><topic>Photons</topic><topic>Reflection</topic><topic>Spectroscopic telescopes</topic><topic>Stellar accretion disks</topic><topic>X ray binaries</topic><topic>X ray spectra</topic><topic>X ray stars</topic><topic>X-ray astronomy</topic><topic>X-ray transient sources</topic><topic>X-rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>You, Bei</creatorcontrib><creatorcontrib>Dong, Yanting</creatorcontrib><creatorcontrib>Yan, Zhen</creatorcontrib><creatorcontrib>Liu, Zhu</creatorcontrib><creatorcontrib>Tuo, Youli</creatorcontrib><creatorcontrib>Yao, Yuanle</creatorcontrib><creatorcontrib>Cao, Xinwu</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><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><collection>DOAJ Directory of Open Access Journals</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>You, Bei</au><au>Dong, Yanting</au><au>Yan, Zhen</au><au>Liu, Zhu</au><au>Tuo, Youli</au><au>Yao, Yuanle</au><au>Cao, Xinwu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>X-Ray Spectral Correlations in a Sample of Low-mass Black Hole X-Ray Binaries in the Hard State</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. 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R
(the ratio of the coronal intensity that illuminates the disk to the coronal intensity that reaches the observer), consistent with previous studies, but except for MAXI J1820+070. It is quite interesting that this source also deviates from the well-known “V”-shaped correlation between the photon index Γ and the X-ray luminosity
log
L
X
, when it is in the bright hard state. More specifically, the Λ-shaped correlation between Γ and log
L
X
is observed, as the luminosity decreases by a factor of 3 in a narrow range from ∼10
38
to 10
37.5
erg s
−1
. Furthermore, we discover a strong positive correlation between
R
and the X-ray luminosity for BHXRBs in the hard state, which puts a constraint on the disk-corona coupling and the evolution.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/acba11</doi><tpages>16</tpages><orcidid>https://orcid.org/0000-0003-3127-0110</orcidid><orcidid>https://orcid.org/0000-0002-5385-9586</orcidid><orcidid>https://orcid.org/0000-0002-8231-063X</orcidid><orcidid>https://orcid.org/0000-0003-3014-8762</orcidid><orcidid>https://orcid.org/0000-0002-2355-3498</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Accretion Astrophysics Black hole physics Black holes Broadband Corona Correlation Deposition Luminosity Photons Reflection Spectroscopic telescopes Stellar accretion disks X ray binaries X ray spectra X ray stars X-ray astronomy X-ray transient sources X-rays |
| title | X-Ray Spectral Correlations in a Sample of Low-mass Black Hole X-Ray Binaries in the Hard State |
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