Oblique magnetic fields and the role of frame dragging
Astronomische Nachrichten, Volume 340, Issue 1-3, pp. 100-104 (2019) Magnetic null points can develop near the ergosphere boundary of a rotating black hole by the combined effects of strong gravitational field and the frame-dragging mechanism. The electric component does not vanish in the magnetic n...
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| creator | Karas, Vladimir Kopacek, Ondrej Kunneriath, Devaky Tahamtan, Tayebeh |
| description | Astronomische Nachrichten, Volume 340, Issue 1-3, pp. 100-104
(2019) Magnetic null points can develop near the ergosphere boundary of a rotating
black hole by the combined effects of strong gravitational field and the
frame-dragging mechanism. The electric component does not vanish in the
magnetic null and an efficient process or particle acceleration can occur. The
situation is relevant for starving (low-accretion-rate, such as the Milky Way's
supermassive black hole) nuclei of some galaxies which exhibit only episodic
accretion events. The presence of the magnetic field field of an external
origin is an important aspect. We propose that such conditions can develop when
a magnetized neutron star approaches the supermassive black hole during late
stages of its inspiral motion. The field lines of the neutron star dipole
thread the black hole's event horizon and change rapidly their connectivity. We
put in comparison the case of a dipole-type magnetic field of a sinking and
orbiting star near a non-rotating black hole, and the near-horizon structure of
an asymptotically uniform magnetic field of a distant source near a
fast-rotating black hole. Although the two cases are qualitatively different
from each other, they both develop magnetically neutral null points near the
event horizon. |
| doi_str_mv | 10.48550/arxiv.1901.06499 |
| format | Article |
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(2019) Magnetic null points can develop near the ergosphere boundary of a rotating
black hole by the combined effects of strong gravitational field and the
frame-dragging mechanism. The electric component does not vanish in the
magnetic null and an efficient process or particle acceleration can occur. The
situation is relevant for starving (low-accretion-rate, such as the Milky Way's
supermassive black hole) nuclei of some galaxies which exhibit only episodic
accretion events. The presence of the magnetic field field of an external
origin is an important aspect. We propose that such conditions can develop when
a magnetized neutron star approaches the supermassive black hole during late
stages of its inspiral motion. The field lines of the neutron star dipole
thread the black hole's event horizon and change rapidly their connectivity. We
put in comparison the case of a dipole-type magnetic field of a sinking and
orbiting star near a non-rotating black hole, and the near-horizon structure of
an asymptotically uniform magnetic field of a distant source near a
fast-rotating black hole. Although the two cases are qualitatively different
from each other, they both develop magnetically neutral null points near the
event horizon.</description><identifier>DOI: 10.48550/arxiv.1901.06499</identifier><language>eng</language><subject>Physics - High Energy Astrophysical Phenomena</subject><creationdate>2019-01</creationdate><rights>http://arxiv.org/licenses/nonexclusive-distrib/1.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,780,885</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/1901.06499$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.1901.06499$$DView paper in arXiv$$Hfree_for_read</backlink><backlink>$$Uhttps://doi.org/10.1002/asna.201913569$$DView published paper (Access to full text may be restricted)$$Hfree_for_read</backlink></links><search><creatorcontrib>Karas, Vladimir</creatorcontrib><creatorcontrib>Kopacek, Ondrej</creatorcontrib><creatorcontrib>Kunneriath, Devaky</creatorcontrib><creatorcontrib>Tahamtan, Tayebeh</creatorcontrib><title>Oblique magnetic fields and the role of frame dragging</title><description>Astronomische Nachrichten, Volume 340, Issue 1-3, pp. 100-104
(2019) Magnetic null points can develop near the ergosphere boundary of a rotating
black hole by the combined effects of strong gravitational field and the
frame-dragging mechanism. The electric component does not vanish in the
magnetic null and an efficient process or particle acceleration can occur. The
situation is relevant for starving (low-accretion-rate, such as the Milky Way's
supermassive black hole) nuclei of some galaxies which exhibit only episodic
accretion events. The presence of the magnetic field field of an external
origin is an important aspect. We propose that such conditions can develop when
a magnetized neutron star approaches the supermassive black hole during late
stages of its inspiral motion. The field lines of the neutron star dipole
thread the black hole's event horizon and change rapidly their connectivity. We
put in comparison the case of a dipole-type magnetic field of a sinking and
orbiting star near a non-rotating black hole, and the near-horizon structure of
an asymptotically uniform magnetic field of a distant source near a
fast-rotating black hole. Although the two cases are qualitatively different
from each other, they both develop magnetically neutral null points near the
event horizon.</description><subject>Physics - High Energy Astrophysical Phenomena</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNpjYJA0NNAzsTA1NdBPLKrILNMztDQw1DMwM7G05GQw80_KySwsTVXITUzPSy3JTFZIy0zNSSlWSMxLUSjJSFUoys9JVchPU0grSsxNVUgpSkxPz8xL52FgTUvMKU7lhdLcDPJuriHOHrpgG-ILijJzE4sq40E2xYNtMiasAgB9XTK4</recordid><startdate>20190119</startdate><enddate>20190119</enddate><creator>Karas, Vladimir</creator><creator>Kopacek, Ondrej</creator><creator>Kunneriath, Devaky</creator><creator>Tahamtan, Tayebeh</creator><scope>GOX</scope></search><sort><creationdate>20190119</creationdate><title>Oblique magnetic fields and the role of frame dragging</title><author>Karas, Vladimir ; Kopacek, Ondrej ; Kunneriath, Devaky ; Tahamtan, Tayebeh</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-arxiv_primary_1901_064993</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Physics - High Energy Astrophysical Phenomena</topic><toplevel>online_resources</toplevel><creatorcontrib>Karas, Vladimir</creatorcontrib><creatorcontrib>Kopacek, Ondrej</creatorcontrib><creatorcontrib>Kunneriath, Devaky</creatorcontrib><creatorcontrib>Tahamtan, Tayebeh</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Karas, Vladimir</au><au>Kopacek, Ondrej</au><au>Kunneriath, Devaky</au><au>Tahamtan, Tayebeh</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Oblique magnetic fields and the role of frame dragging</atitle><date>2019-01-19</date><risdate>2019</risdate><abstract>Astronomische Nachrichten, Volume 340, Issue 1-3, pp. 100-104
(2019) Magnetic null points can develop near the ergosphere boundary of a rotating
black hole by the combined effects of strong gravitational field and the
frame-dragging mechanism. The electric component does not vanish in the
magnetic null and an efficient process or particle acceleration can occur. The
situation is relevant for starving (low-accretion-rate, such as the Milky Way's
supermassive black hole) nuclei of some galaxies which exhibit only episodic
accretion events. The presence of the magnetic field field of an external
origin is an important aspect. We propose that such conditions can develop when
a magnetized neutron star approaches the supermassive black hole during late
stages of its inspiral motion. The field lines of the neutron star dipole
thread the black hole's event horizon and change rapidly their connectivity. We
put in comparison the case of a dipole-type magnetic field of a sinking and
orbiting star near a non-rotating black hole, and the near-horizon structure of
an asymptotically uniform magnetic field of a distant source near a
fast-rotating black hole. Although the two cases are qualitatively different
from each other, they both develop magnetically neutral null points near the
event horizon.</abstract><doi>10.48550/arxiv.1901.06499</doi><oa>free_for_read</oa></addata></record> |
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| title | Oblique magnetic fields and the role of frame dragging |
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