Feedback from γ Cassiopeiae: Large Expanding Cavity, Accelerating Cometary Globules, and Peculiar X-Ray Emission
We present wide-field multiwavelength observations of γ Cassiopeiae (or γ Cas for short) in order to study its feedback toward the interstellar environment. A large expanding cavity is discovered toward γ Cas in the neutral hydrogen (H i ) images at a systemic velocity of about −10 km s −1 . The mea...
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| Veröffentlicht in: | The Astrophysical journal 2021-12, Vol.922 (2), p.183 |
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| creator | Chen, Xuepeng Guo, Weihua Sun, Li Feng, Jiangchen Su, Yang Sun, Yan Zhang, Shaobo Zhou, Xin Yan, Qing-Zeng Fang, Min Yang, Ji |
| description | We present wide-field multiwavelength observations of
γ
Cassiopeiae (or
γ
Cas for short) in order to study its feedback toward the interstellar environment. A large expanding cavity is discovered toward
γ
Cas in the neutral hydrogen (H
i
) images at a systemic velocity of about −10 km s
−1
. The measured dimension of the cavity is roughly 2.°0 × 1.°4 (or 6.0 pc × 4.2 pc at a distance of 168 pc), while the expansion velocity is ∼5.0 ± 0.5 km s
−1
. The CO observations reveal systematic velocity gradients in IC 63 (∼20 km s
−1
pc
−1
) and IC 59 (∼30 km s
−1
pc
−1
), two cometary globules illuminated by
γ
Cas, proving fast acceleration of the globules under stellar radiation pressure. The gas kinematics indicate that the cavity is opened by strong stellar wind, which has high potential to lead to the peculiar X-ray emission observed in
γ
Cas. Our result favors a new scenario that emphasizes the roles of stellar wind and binarity in the X-ray emission of the
γ
Cas stars. |
| doi_str_mv | 10.3847/1538-4357/ac2507 |
| format | Article |
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γ
Cassiopeiae (or
γ
Cas for short) in order to study its feedback toward the interstellar environment. A large expanding cavity is discovered toward
γ
Cas in the neutral hydrogen (H
i
) images at a systemic velocity of about −10 km s
−1
. The measured dimension of the cavity is roughly 2.°0 × 1.°4 (or 6.0 pc × 4.2 pc at a distance of 168 pc), while the expansion velocity is ∼5.0 ± 0.5 km s
−1
. The CO observations reveal systematic velocity gradients in IC 63 (∼20 km s
−1
pc
−1
) and IC 59 (∼30 km s
−1
pc
−1
), two cometary globules illuminated by
γ
Cas, proving fast acceleration of the globules under stellar radiation pressure. The gas kinematics indicate that the cavity is opened by strong stellar wind, which has high potential to lead to the peculiar X-ray emission observed in
γ
Cas. Our result favors a new scenario that emphasizes the roles of stellar wind and binarity in the X-ray emission of the
γ
Cas stars.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/ac2507</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Acceleration ; Astrophysics ; Be stars ; Comets ; Emission ; Feedback ; Gamma Cassiopeiae stars ; Globules ; Hydrogen ; Interstellar medium ; Kinematics ; Radiation ; Radiation pressure ; Stellar radiation ; Stellar wind bubbles ; Stellar winds ; Velocity ; Velocity gradient ; X-ray emissions ; X-rays</subject><ispartof>The Astrophysical journal, 2021-12, Vol.922 (2), p.183</ispartof><rights>2021. The Author(s). Published by the American Astronomical Society.</rights><rights>Copyright IOP Publishing Dec 01, 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c380t-7263991b3634966221a22773ccabdd544072235e6cd7c7db6f466164dd00a23c3</citedby><cites>FETCH-LOGICAL-c380t-7263991b3634966221a22773ccabdd544072235e6cd7c7db6f466164dd00a23c3</cites><orcidid>0000-0003-3151-8964 ; 0000-0001-7768-7320 ; 0000-0003-4586-7751 ; 0000-0002-8589-9611 ; 0000-0002-3904-1622 ; 0000-0003-2418-3350 ; 0000-0003-2549-7247</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/ac2507/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,780,784,27924,27925,38890,53867</link.rule.ids></links><search><creatorcontrib>Chen, Xuepeng</creatorcontrib><creatorcontrib>Guo, Weihua</creatorcontrib><creatorcontrib>Sun, Li</creatorcontrib><creatorcontrib>Feng, Jiangchen</creatorcontrib><creatorcontrib>Su, Yang</creatorcontrib><creatorcontrib>Sun, Yan</creatorcontrib><creatorcontrib>Zhang, Shaobo</creatorcontrib><creatorcontrib>Zhou, Xin</creatorcontrib><creatorcontrib>Yan, Qing-Zeng</creatorcontrib><creatorcontrib>Fang, Min</creatorcontrib><creatorcontrib>Yang, Ji</creatorcontrib><title>Feedback from γ Cassiopeiae: Large Expanding Cavity, Accelerating Cometary Globules, and Peculiar X-Ray Emission</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>We present wide-field multiwavelength observations of
γ
Cassiopeiae (or
γ
Cas for short) in order to study its feedback toward the interstellar environment. A large expanding cavity is discovered toward
γ
Cas in the neutral hydrogen (H
i
) images at a systemic velocity of about −10 km s
−1
. The measured dimension of the cavity is roughly 2.°0 × 1.°4 (or 6.0 pc × 4.2 pc at a distance of 168 pc), while the expansion velocity is ∼5.0 ± 0.5 km s
−1
. The CO observations reveal systematic velocity gradients in IC 63 (∼20 km s
−1
pc
−1
) and IC 59 (∼30 km s
−1
pc
−1
), two cometary globules illuminated by
γ
Cas, proving fast acceleration of the globules under stellar radiation pressure. The gas kinematics indicate that the cavity is opened by strong stellar wind, which has high potential to lead to the peculiar X-ray emission observed in
γ
Cas. Our result favors a new scenario that emphasizes the roles of stellar wind and binarity in the X-ray emission of the
γ
Cas stars.</description><subject>Acceleration</subject><subject>Astrophysics</subject><subject>Be stars</subject><subject>Comets</subject><subject>Emission</subject><subject>Feedback</subject><subject>Gamma Cassiopeiae stars</subject><subject>Globules</subject><subject>Hydrogen</subject><subject>Interstellar medium</subject><subject>Kinematics</subject><subject>Radiation</subject><subject>Radiation pressure</subject><subject>Stellar radiation</subject><subject>Stellar wind bubbles</subject><subject>Stellar winds</subject><subject>Velocity</subject><subject>Velocity gradient</subject><subject>X-ray emissions</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><sourceid>O3W</sourceid><recordid>eNp9kN9KwzAUh4MoOKf3XgbEu9WlSZq03snYpjBQRGF3IU3S0dl_S1pxz-V7-EymVvRGvDqck-_8DvkAOA_RFYkpn4YRiQNKIj6VCkeIH4DRz-gQjBBCNGCEr4_BiXPbvsVJMgK7hTE6leoFZrYu4cc7nEnn8roxuTTXcCXtxsD5WyMrnVcb__iat_sJvFHKFMbK9mtYl6aVdg-XRZ12hXET6HH4YFRX5NLCdfAo93Be5n1wdQqOMlk4c_Zdx-B5MX-a3Qar--Xd7GYVKBKjNuCYkSQJU8IITRjDOJQYc06UkqnWEaWIY0wiw5TmiuuUZZSxkFGtEZKYKDIGF0NuY-tdZ1wrtnVnK39SYIZoFMUcIU-hgVK2ds6aTDQ2L_1nRIhEL1b0FkVvUQxi_cpkWPGWfjP_wS__wGWzFQnGAoswJqLRGfkEI5CFYQ</recordid><startdate>20211201</startdate><enddate>20211201</enddate><creator>Chen, Xuepeng</creator><creator>Guo, Weihua</creator><creator>Sun, Li</creator><creator>Feng, Jiangchen</creator><creator>Su, Yang</creator><creator>Sun, Yan</creator><creator>Zhang, Shaobo</creator><creator>Zhou, Xin</creator><creator>Yan, Qing-Zeng</creator><creator>Fang, Min</creator><creator>Yang, Ji</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/0000-0003-3151-8964</orcidid><orcidid>https://orcid.org/0000-0001-7768-7320</orcidid><orcidid>https://orcid.org/0000-0003-4586-7751</orcidid><orcidid>https://orcid.org/0000-0002-8589-9611</orcidid><orcidid>https://orcid.org/0000-0002-3904-1622</orcidid><orcidid>https://orcid.org/0000-0003-2418-3350</orcidid><orcidid>https://orcid.org/0000-0003-2549-7247</orcidid></search><sort><creationdate>20211201</creationdate><title>Feedback from γ Cassiopeiae: Large Expanding Cavity, Accelerating Cometary Globules, and Peculiar X-Ray Emission</title><author>Chen, Xuepeng ; Guo, Weihua ; Sun, Li ; Feng, Jiangchen ; Su, Yang ; Sun, Yan ; Zhang, Shaobo ; Zhou, Xin ; Yan, Qing-Zeng ; Fang, Min ; Yang, Ji</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-7263991b3634966221a22773ccabdd544072235e6cd7c7db6f466164dd00a23c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Acceleration</topic><topic>Astrophysics</topic><topic>Be stars</topic><topic>Comets</topic><topic>Emission</topic><topic>Feedback</topic><topic>Gamma Cassiopeiae stars</topic><topic>Globules</topic><topic>Hydrogen</topic><topic>Interstellar medium</topic><topic>Kinematics</topic><topic>Radiation</topic><topic>Radiation pressure</topic><topic>Stellar radiation</topic><topic>Stellar wind bubbles</topic><topic>Stellar winds</topic><topic>Velocity</topic><topic>Velocity gradient</topic><topic>X-ray emissions</topic><topic>X-rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Xuepeng</creatorcontrib><creatorcontrib>Guo, Weihua</creatorcontrib><creatorcontrib>Sun, Li</creatorcontrib><creatorcontrib>Feng, Jiangchen</creatorcontrib><creatorcontrib>Su, Yang</creatorcontrib><creatorcontrib>Sun, Yan</creatorcontrib><creatorcontrib>Zhang, Shaobo</creatorcontrib><creatorcontrib>Zhou, Xin</creatorcontrib><creatorcontrib>Yan, Qing-Zeng</creatorcontrib><creatorcontrib>Fang, Min</creatorcontrib><creatorcontrib>Yang, Ji</creatorcontrib><collection>Institute of Physics Open Access Journal Titles</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>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Xuepeng</au><au>Guo, Weihua</au><au>Sun, Li</au><au>Feng, Jiangchen</au><au>Su, Yang</au><au>Sun, Yan</au><au>Zhang, Shaobo</au><au>Zhou, Xin</au><au>Yan, Qing-Zeng</au><au>Fang, Min</au><au>Yang, Ji</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Feedback from γ Cassiopeiae: Large Expanding Cavity, Accelerating Cometary Globules, and Peculiar X-Ray Emission</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2021-12-01</date><risdate>2021</risdate><volume>922</volume><issue>2</issue><spage>183</spage><pages>183-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We present wide-field multiwavelength observations of
γ
Cassiopeiae (or
γ
Cas for short) in order to study its feedback toward the interstellar environment. A large expanding cavity is discovered toward
γ
Cas in the neutral hydrogen (H
i
) images at a systemic velocity of about −10 km s
−1
. The measured dimension of the cavity is roughly 2.°0 × 1.°4 (or 6.0 pc × 4.2 pc at a distance of 168 pc), while the expansion velocity is ∼5.0 ± 0.5 km s
−1
. The CO observations reveal systematic velocity gradients in IC 63 (∼20 km s
−1
pc
−1
) and IC 59 (∼30 km s
−1
pc
−1
), two cometary globules illuminated by
γ
Cas, proving fast acceleration of the globules under stellar radiation pressure. The gas kinematics indicate that the cavity is opened by strong stellar wind, which has high potential to lead to the peculiar X-ray emission observed in
γ
Cas. Our result favors a new scenario that emphasizes the roles of stellar wind and binarity in the X-ray emission of the
γ
Cas stars.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/ac2507</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0003-3151-8964</orcidid><orcidid>https://orcid.org/0000-0001-7768-7320</orcidid><orcidid>https://orcid.org/0000-0003-4586-7751</orcidid><orcidid>https://orcid.org/0000-0002-8589-9611</orcidid><orcidid>https://orcid.org/0000-0002-3904-1622</orcidid><orcidid>https://orcid.org/0000-0003-2418-3350</orcidid><orcidid>https://orcid.org/0000-0003-2549-7247</orcidid><oa>free_for_read</oa></addata></record> |
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| source | Institute of Physics Open Access Journal Titles; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Acceleration Astrophysics Be stars Comets Emission Feedback Gamma Cassiopeiae stars Globules Hydrogen Interstellar medium Kinematics Radiation Radiation pressure Stellar radiation Stellar wind bubbles Stellar winds Velocity Velocity gradient X-ray emissions X-rays |
| title | Feedback from γ Cassiopeiae: Large Expanding Cavity, Accelerating Cometary Globules, and Peculiar X-Ray Emission |
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