Decoding the X-Ray Flare from MAXI J0709–159 Using Optical Spectroscopy and Multiepoch Photometry
We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709–159 in the direction of HD 54786 (LY CMa), on 2022 January 25. The X-ray luminosity during the flare was around 10 37 erg s −1 (MAXI), which g...
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| Veröffentlicht in: | Astrophysical journal. Letters 2022-07, Vol.933 (2), p.L34 |
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| creator | Bhattacharyya, Suman Mathew, Blesson Ezhikode, Savithri H Muneer, S. G., Selvakumar G., Maheswer Arun, R. Anilkumar, Hema Banerjee, Gourav Kumar S, Pramod Kartha, Sreeja S Paul, KT Velu, C. |
| description | We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709–159 in the direction of HD 54786 (LY CMa), on 2022 January 25. The X-ray luminosity during the flare was around 10
37
erg s
−1
(MAXI), which got reduced to 10
32
erg s
−1
(NuSTAR) after the flare. We took low-resolution spectra of HD 54786 from the 2.01 m Himalayan Chandra Telescope and the 2.34 m Vainu Bappu Telescope (VBT) facilities in India, on 2022 February 1 and 2. In addition to H
α
emission, we found emission lines of He
i
in the optical spectrum of this star. By comparing our spectrum of the object with those from the literature we found that He
i
lines show variability. Using photometric studies we estimate that the star has an effective temperature of 20,000 K. Although HD 54786 is reported as a supergiant in previous studies, our analysis favors it to be evolving off the main sequence in the color–magnitude diagram. We could not detect any infrared excess, ruling out the possibility of IR emission from a dusty circumstellar disk. Our present study suggests that HD 54786 is a Be/X-ray binary system with a compact object companion, possibly a neutron star. |
| doi_str_mv | 10.3847/2041-8213/ac7b8a |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_iop_j</sourceid><recordid>TN_cdi_iop_journals_10_3847_2041_8213_ac7b8a</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2688149969</sourcerecordid><originalsourceid>FETCH-LOGICAL-c381t-1c47a0ec54d87a9b315ac9099eca85e1bdd32021c903f5b9e95aa7d630fadc953</originalsourceid><addsrcrecordid>eNp1kLFOwzAURS0EEqWwM1pCYiLUjuPGHqtCoahVEVCpm-XYDk2V1sZxh2z8A3_Il5AoCBaY3tPVufc9XQDOMbomLEkHMUpwxGJMBlKlGZMHoPcjHf7siB6Dk6raIBSjIWY9oG6MsrrYvcKwNnAVPckaTkrpDcy93cL5aDWFDyhF_PP9A1MOl1XLLlwolCzhszMqeFsp62oodxrO92UojLNqDR_XNtitCb4-BUe5LCtz9j37YDm5fRnfR7PF3XQ8mkWKMBwirJJUIqNoolkqeUYwlYojzo2SjBqcaU1iFONGIznNuOFUylQPCcqlVpySPrjocp23b3tTBbGxe79rTop4yBhOOB_yhkIdpZrHK29y4Xyxlb4WGIm2StF2JdreRFdlY7nsLIV1v5nSbUrBCRGxmJFEOJ034NUf4L-5X64pgkE</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2688149969</pqid></control><display><type>article</type><title>Decoding the X-Ray Flare from MAXI J0709–159 Using Optical Spectroscopy and Multiepoch Photometry</title><source>IOP Publishing Free Content</source><source>DOAJ Directory of Open Access Journals</source><source>EZB-FREE-00999 freely available EZB journals</source><source>IOPscience extra</source><source>Alma/SFX Local Collection</source><creator>Bhattacharyya, Suman ; Mathew, Blesson ; Ezhikode, Savithri H ; Muneer, S. ; G., Selvakumar ; G., Maheswer ; Arun, R. ; Anilkumar, Hema ; Banerjee, Gourav ; Kumar S, Pramod ; Kartha, Sreeja S ; Paul, KT ; Velu, C.</creator><creatorcontrib>Bhattacharyya, Suman ; Mathew, Blesson ; Ezhikode, Savithri H ; Muneer, S. ; G., Selvakumar ; G., Maheswer ; Arun, R. ; Anilkumar, Hema ; Banerjee, Gourav ; Kumar S, Pramod ; Kartha, Sreeja S ; Paul, KT ; Velu, C.</creatorcontrib><description>We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709–159 in the direction of HD 54786 (LY CMa), on 2022 January 25. The X-ray luminosity during the flare was around 10
37
erg s
−1
(MAXI), which got reduced to 10
32
erg s
−1
(NuSTAR) after the flare. We took low-resolution spectra of HD 54786 from the 2.01 m Himalayan Chandra Telescope and the 2.34 m Vainu Bappu Telescope (VBT) facilities in India, on 2022 February 1 and 2. In addition to H
α
emission, we found emission lines of He
i
in the optical spectrum of this star. By comparing our spectrum of the object with those from the literature we found that He
i
lines show variability. Using photometric studies we estimate that the star has an effective temperature of 20,000 K. Although HD 54786 is reported as a supergiant in previous studies, our analysis favors it to be evolving off the main sequence in the color–magnitude diagram. We could not detect any infrared excess, ruling out the possibility of IR emission from a dusty circumstellar disk. Our present study suggests that HD 54786 is a Be/X-ray binary system with a compact object companion, possibly a neutron star.</description><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.3847/2041-8213/ac7b8a</identifier><language>eng</language><publisher>Austin: The American Astronomical Society</publisher><subject>Accretion disks ; Be stars ; Binary stars ; Companion stars ; Emission analysis ; Emission lines ; H alpha line ; Hard X-rays ; Luminosity ; Neutron stars ; Photometry ; Spectroscopy ; Spectrum analysis ; Stellar flares ; X ray binaries ; X ray stars ; X-ray binary stars ; X-ray sources ; X-rays</subject><ispartof>Astrophysical journal. Letters, 2022-07, Vol.933 (2), p.L34</ispartof><rights>2022. The Author(s). Published by the American Astronomical Society.</rights><rights>2022. 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-c381t-1c47a0ec54d87a9b315ac9099eca85e1bdd32021c903f5b9e95aa7d630fadc953</citedby><cites>FETCH-LOGICAL-c381t-1c47a0ec54d87a9b315ac9099eca85e1bdd32021c903f5b9e95aa7d630fadc953</cites><orcidid>0000-0002-1920-6055 ; 0000-0002-4024-956X ; 0000-0002-4999-2990 ; 0000-0001-8873-1171 ; 0000-0003-1795-3281 ; 0000-0002-7666-1062 ; 0000-0002-7254-191X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.3847/2041-8213/ac7b8a/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,776,780,860,27901,27902,38845,38867,53815,53842</link.rule.ids></links><search><creatorcontrib>Bhattacharyya, Suman</creatorcontrib><creatorcontrib>Mathew, Blesson</creatorcontrib><creatorcontrib>Ezhikode, Savithri H</creatorcontrib><creatorcontrib>Muneer, S.</creatorcontrib><creatorcontrib>G., Selvakumar</creatorcontrib><creatorcontrib>G., Maheswer</creatorcontrib><creatorcontrib>Arun, R.</creatorcontrib><creatorcontrib>Anilkumar, Hema</creatorcontrib><creatorcontrib>Banerjee, Gourav</creatorcontrib><creatorcontrib>Kumar S, Pramod</creatorcontrib><creatorcontrib>Kartha, Sreeja S</creatorcontrib><creatorcontrib>Paul, KT</creatorcontrib><creatorcontrib>Velu, C.</creatorcontrib><title>Decoding the X-Ray Flare from MAXI J0709–159 Using Optical Spectroscopy and Multiepoch Photometry</title><title>Astrophysical journal. Letters</title><addtitle>APJL</addtitle><addtitle>Astrophys. J. Lett</addtitle><description>We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709–159 in the direction of HD 54786 (LY CMa), on 2022 January 25. The X-ray luminosity during the flare was around 10
37
erg s
−1
(MAXI), which got reduced to 10
32
erg s
−1
(NuSTAR) after the flare. We took low-resolution spectra of HD 54786 from the 2.01 m Himalayan Chandra Telescope and the 2.34 m Vainu Bappu Telescope (VBT) facilities in India, on 2022 February 1 and 2. In addition to H
α
emission, we found emission lines of He
i
in the optical spectrum of this star. By comparing our spectrum of the object with those from the literature we found that He
i
lines show variability. Using photometric studies we estimate that the star has an effective temperature of 20,000 K. Although HD 54786 is reported as a supergiant in previous studies, our analysis favors it to be evolving off the main sequence in the color–magnitude diagram. We could not detect any infrared excess, ruling out the possibility of IR emission from a dusty circumstellar disk. Our present study suggests that HD 54786 is a Be/X-ray binary system with a compact object companion, possibly a neutron star.</description><subject>Accretion disks</subject><subject>Be stars</subject><subject>Binary stars</subject><subject>Companion stars</subject><subject>Emission analysis</subject><subject>Emission lines</subject><subject>H alpha line</subject><subject>Hard X-rays</subject><subject>Luminosity</subject><subject>Neutron stars</subject><subject>Photometry</subject><subject>Spectroscopy</subject><subject>Spectrum analysis</subject><subject>Stellar flares</subject><subject>X ray binaries</subject><subject>X ray stars</subject><subject>X-ray binary stars</subject><subject>X-ray sources</subject><subject>X-rays</subject><issn>2041-8205</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><recordid>eNp1kLFOwzAURS0EEqWwM1pCYiLUjuPGHqtCoahVEVCpm-XYDk2V1sZxh2z8A3_Il5AoCBaY3tPVufc9XQDOMbomLEkHMUpwxGJMBlKlGZMHoPcjHf7siB6Dk6raIBSjIWY9oG6MsrrYvcKwNnAVPckaTkrpDcy93cL5aDWFDyhF_PP9A1MOl1XLLlwolCzhszMqeFsp62oodxrO92UojLNqDR_XNtitCb4-BUe5LCtz9j37YDm5fRnfR7PF3XQ8mkWKMBwirJJUIqNoolkqeUYwlYojzo2SjBqcaU1iFONGIznNuOFUylQPCcqlVpySPrjocp23b3tTBbGxe79rTop4yBhOOB_yhkIdpZrHK29y4Xyxlb4WGIm2StF2JdreRFdlY7nsLIV1v5nSbUrBCRGxmJFEOJ034NUf4L-5X64pgkE</recordid><startdate>20220701</startdate><enddate>20220701</enddate><creator>Bhattacharyya, Suman</creator><creator>Mathew, Blesson</creator><creator>Ezhikode, Savithri H</creator><creator>Muneer, S.</creator><creator>G., Selvakumar</creator><creator>G., Maheswer</creator><creator>Arun, R.</creator><creator>Anilkumar, Hema</creator><creator>Banerjee, Gourav</creator><creator>Kumar S, Pramod</creator><creator>Kartha, Sreeja S</creator><creator>Paul, KT</creator><creator>Velu, C.</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><orcidid>https://orcid.org/0000-0002-1920-6055</orcidid><orcidid>https://orcid.org/0000-0002-4024-956X</orcidid><orcidid>https://orcid.org/0000-0002-4999-2990</orcidid><orcidid>https://orcid.org/0000-0001-8873-1171</orcidid><orcidid>https://orcid.org/0000-0003-1795-3281</orcidid><orcidid>https://orcid.org/0000-0002-7666-1062</orcidid><orcidid>https://orcid.org/0000-0002-7254-191X</orcidid></search><sort><creationdate>20220701</creationdate><title>Decoding the X-Ray Flare from MAXI J0709–159 Using Optical Spectroscopy and Multiepoch Photometry</title><author>Bhattacharyya, Suman ; Mathew, Blesson ; Ezhikode, Savithri H ; Muneer, S. ; G., Selvakumar ; G., Maheswer ; Arun, R. ; Anilkumar, Hema ; Banerjee, Gourav ; Kumar S, Pramod ; Kartha, Sreeja S ; Paul, KT ; Velu, C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c381t-1c47a0ec54d87a9b315ac9099eca85e1bdd32021c903f5b9e95aa7d630fadc953</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Accretion disks</topic><topic>Be stars</topic><topic>Binary stars</topic><topic>Companion stars</topic><topic>Emission analysis</topic><topic>Emission lines</topic><topic>H alpha line</topic><topic>Hard X-rays</topic><topic>Luminosity</topic><topic>Neutron stars</topic><topic>Photometry</topic><topic>Spectroscopy</topic><topic>Spectrum analysis</topic><topic>Stellar flares</topic><topic>X ray binaries</topic><topic>X ray stars</topic><topic>X-ray binary stars</topic><topic>X-ray sources</topic><topic>X-rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bhattacharyya, Suman</creatorcontrib><creatorcontrib>Mathew, Blesson</creatorcontrib><creatorcontrib>Ezhikode, Savithri H</creatorcontrib><creatorcontrib>Muneer, S.</creatorcontrib><creatorcontrib>G., Selvakumar</creatorcontrib><creatorcontrib>G., Maheswer</creatorcontrib><creatorcontrib>Arun, R.</creatorcontrib><creatorcontrib>Anilkumar, Hema</creatorcontrib><creatorcontrib>Banerjee, Gourav</creatorcontrib><creatorcontrib>Kumar S, Pramod</creatorcontrib><creatorcontrib>Kartha, Sreeja S</creatorcontrib><creatorcontrib>Paul, KT</creatorcontrib><creatorcontrib>Velu, C.</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><jtitle>Astrophysical journal. Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bhattacharyya, Suman</au><au>Mathew, Blesson</au><au>Ezhikode, Savithri H</au><au>Muneer, S.</au><au>G., Selvakumar</au><au>G., Maheswer</au><au>Arun, R.</au><au>Anilkumar, Hema</au><au>Banerjee, Gourav</au><au>Kumar S, Pramod</au><au>Kartha, Sreeja S</au><au>Paul, KT</au><au>Velu, C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Decoding the X-Ray Flare from MAXI J0709–159 Using Optical Spectroscopy and Multiepoch Photometry</atitle><jtitle>Astrophysical journal. Letters</jtitle><stitle>APJL</stitle><addtitle>Astrophys. J. Lett</addtitle><date>2022-07-01</date><risdate>2022</risdate><volume>933</volume><issue>2</issue><spage>L34</spage><pages>L34-</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709–159 in the direction of HD 54786 (LY CMa), on 2022 January 25. The X-ray luminosity during the flare was around 10
37
erg s
−1
(MAXI), which got reduced to 10
32
erg s
−1
(NuSTAR) after the flare. We took low-resolution spectra of HD 54786 from the 2.01 m Himalayan Chandra Telescope and the 2.34 m Vainu Bappu Telescope (VBT) facilities in India, on 2022 February 1 and 2. In addition to H
α
emission, we found emission lines of He
i
in the optical spectrum of this star. By comparing our spectrum of the object with those from the literature we found that He
i
lines show variability. Using photometric studies we estimate that the star has an effective temperature of 20,000 K. Although HD 54786 is reported as a supergiant in previous studies, our analysis favors it to be evolving off the main sequence in the color–magnitude diagram. We could not detect any infrared excess, ruling out the possibility of IR emission from a dusty circumstellar disk. Our present study suggests that HD 54786 is a Be/X-ray binary system with a compact object companion, possibly a neutron star.</abstract><cop>Austin</cop><pub>The American Astronomical Society</pub><doi>10.3847/2041-8213/ac7b8a</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0002-1920-6055</orcidid><orcidid>https://orcid.org/0000-0002-4024-956X</orcidid><orcidid>https://orcid.org/0000-0002-4999-2990</orcidid><orcidid>https://orcid.org/0000-0001-8873-1171</orcidid><orcidid>https://orcid.org/0000-0003-1795-3281</orcidid><orcidid>https://orcid.org/0000-0002-7666-1062</orcidid><orcidid>https://orcid.org/0000-0002-7254-191X</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Accretion disks Be stars Binary stars Companion stars Emission analysis Emission lines H alpha line Hard X-rays Luminosity Neutron stars Photometry Spectroscopy Spectrum analysis Stellar flares X ray binaries X ray stars X-ray binary stars X-ray sources X-rays |
| title | Decoding the X-Ray Flare from MAXI J0709–159 Using Optical Spectroscopy and Multiepoch Photometry |
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