Accretion disks around naked singularities
نویسندگان
چکیده
منابع مشابه
Sporadically Torqued Accretion Disks Around Black Holes
The assumption that black hole accretion disks possess an untorqued inner boundary, the so-called zero torque boundary condition, has been employed by models of black hole disks for many years. However, recent theoretical and observational work suggests that magnetic forces may appreciably torque the inner disk. This raises the question of the effect that a time-changing magnetic torque may hav...
متن کاملModels of Accretion Disks around Young Stars
We discuss the importance of accretion in calculating disk models for young stellar objects. In particular, we show that a disk inner rim, irradiated by both the star and the accretion shocks at the stellar surface, can naturally explain recent observations of DG Tau with the Keck interferometer. We present models for two objects, with mass accretion rates differing by almost two orders of magn...
متن کاملPerfect fluid around black holes and naked singularities
We find analytical solutions for the spherically symmetric stationary distribution of a test perfect fluid with an arbitrary equation of state in the ReissnerNordström metric. These solutions describe the stationary accretion onto black hole and the static atmosphere of a fluid around the naked singularity. The electrically charged black hole evolves to a near extreme state by accretion of a ph...
متن کاملPhysics Fundamentals of Luminous Accretion Disks around Black Holes
These lectures provide an overview of the theory of accretion disks with application to bright sources containing black holes. I focus on the fundamental physics of these flows, stressing modern developments and outstanding questions wherever possible. After a review of standard Shakura-Sunyaev based models and their problems and uncertainties, I describe the basic principles that determine the...
متن کاملAccretion Disks around Young Stars: Lifetimes, Disk Locking and Variability
We report the findings of a comprehensive study of disk accretion and related phenomena in four of the nearest young stellar associations spanning 6-30 million years in age, an epoch that may coincide with the late stages of planet formation. We have obtained ∼650 multi-epoch high-resolution optical spectra of 100 lowmass stars that are likely members of the η Chamaeleontis (∼6 Myr), TW Hydrae ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2020
ISSN: 0264-9381,1361-6382
DOI: 10.1088/1361-6382/abce44