The structure of energy-extracting black hole magnetospheres

dc.contributor.advisorChairperson, Graduate Committee: Yves U. Idzerdaen
dc.contributor.authorThoelecke, Kevinen
dc.date.accessioned2019-10-21T18:47:40Z
dc.date.available2019-10-21T18:47:40Z
dc.date.issued2019en
dc.description.abstractSpinning black holes can store enormous amounts of rotational energy. Efficiently extracting that rotational energy can lead to significant energy outflows capable of powering very high energy astrophysical phenomena, such as gamma-ray bursts and active galactic nuclei. Black holes are unique in that they do not exist as physical objects in the same way a rock, planet, or star exists; instead, black holes exist only as spacetime curvature. As such processes for extracting a black hole's rotational energy are largely unique to black holes. This work explores one such process, the extraction of a black hole's rotational energy via an appropriately configured magnetosphere. Both analytic perturbation techniques and numerical codes are developed in order to solve for thousands of energy-extracting black hole magnetospheres. Those magnetospheres broadly sample the relevant solution space, allowing correlations to be drawn between different rates of black hole rotational energy and angular momentum extraction and global magnetosphere structure. The most fundamental behavior discovered is that magnetospheres that extract the most energy per unit angular momentum direct that energy away from the black hole's rotational axis, while magnetospheres that extract the least amount of energy per unit angular momentum direct that energy into jet-like structures aligned with the black hole's rotational axis. Exploration of the solutions obtained also suggests that magnetospheres most compatible with nearby accreting matter can very naturally launch jets, implying that black hole energy extraction and jet launching are likely to be concurrent and common features of astrophysical black hole magnetospheres.en
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/15605en
dc.language.isoenen
dc.publisherMontana State University - Bozeman, College of Letters & Scienceen
dc.rights.holderCopyright 2019 by Kevin Thoeleckeen
dc.subject.lcshBlack holes (Astronomy)en
dc.subject.lcshRotational motionen
dc.subject.lcshMagnetohydrodynamicsen
dc.subject.lcshAstrophysicsen
dc.titleThe structure of energy-extracting black hole magnetospheresen
dc.typeDissertationen
mus.data.thumbpage189en
thesis.degree.committeemembersMembers, Graduate Committee: Sachiko Tsuruta; Jiong Qiu; Anton Vorontsov; Greg Francis; Nicolas Yunes.en
thesis.degree.departmentPhysics.en
thesis.degree.genreDissertationen
thesis.degree.namePhDen
thesis.format.extentfirstpage1en
thesis.format.extentlastpage346en

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