Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Itai Linial"'
Autor:
D. R. Pasham, E. R. Coughlin, M. Zajaček, Itai Linial, Petra Suková, C. J. Nixon, Agnieszka Janiuk, M. Sniegowska, Vojtěch Witzany, V. Karas, M. Krumpe, D. Altamirano, T. Wevers, Riccardo Arcodia
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 2, p L47 (2024)
Quasiperiodic eruptions (QPEs) represent a novel class of extragalactic X-ray transients that are known to repeat at roughly regular intervals of a few hours to days. Their underlying physical mechanism is a topic of heated debate, with most models p
Externí odkaz:
https://doaj.org/article/2f3d3ef2748d46ad8b0d66a78af4ce6c
Autor:
Itai Linial, Brian D. Metzger
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L1 (2024)
“Quasiperiodic eruptions” (QPE) are recurrent nuclear transients with periods of several hours to almost a day, which thus far have been detected exclusively in the X-ray band. We have shown that many of the key properties of QPE flares (period,
Externí odkaz:
https://doaj.org/article/6b341bbb47f245dbab21b618f89e9ec4
Autor:
Itai Linial, Eliot Quataert
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 67 (2024)
We consider Roche lobe overflow (RLO) from a low-mass star on a nearly circular orbit, onto a supermassive black hole (SMBH). If mass transfer is unstable, its rate accelerates in a runaway process, resulting in highly super-Eddington mass accretion
Externí odkaz:
https://doaj.org/article/669b908f6ee54807b0ec82bff4a6d1d6
Autor:
Itai Linial, Brian D. Metzger
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 101 (2024)
A modest fraction of the stars in galactic nuclei fed toward the central supermassive black hole (SMBH) approach on low-eccentricity orbits driven by gravitational-wave radiation (extreme mass ratio inspiral (EMRI)). In the likely event that a gaseou
Externí odkaz:
https://doaj.org/article/6dc6035a4b54403f8dd01581e4621444
Autor:
Itai Linial, Brian D. Metzger
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 1, p 34 (2023)
Roughly half of the quasiperiodic eruption (QPE) sources in galactic nuclei exhibit a remarkably regular alternating “long-short” pattern of recurrence times between consecutive flares. We show that a main-sequence star (brought into the nucleus
Externí odkaz:
https://doaj.org/article/3994f724db004ea1b46264f57e8f6984
Stellar Collisions in the Galactic Center: Massive Stars, Collision Remnants, and Missing Red Giants
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 1, p 30 (2023)
Like most galaxies, the Milky Way harbors a supermassive black hole (SMBH) at its center, surrounded by a nuclear star cluster. In this dense star cluster, direct collisions can occur between stars before they evolve off the main sequence. Using a st
Externí odkaz:
https://doaj.org/article/5ca8a2f1a15447ef97835b20b8823c9f
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 1, p 14 (2023)
We examine the effects of two-body interactions in a nuclear star cluster surrounding a supermassive black hole. We evaluate the energy flux, analogously to the particle flux calculation of Bahcall and Wolf. We show that there are two types of power-
Externí odkaz:
https://doaj.org/article/4d2fc369bb2f4d7dbc22c66548e330d3
Autor:
Itai Linial, Re’em Sari
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 2, p 86 (2023)
We discuss the formation and evolution of systems composed of a low-mass ( M _⋆ ≲ 4 M _⊙ ) main-sequence star orbiting a 10 ^5 –10 ^7 M _⊙ supermassive black hole with an orbital period of order ∼hours and a mild eccentricity ( e ≈ 0.1
Externí odkaz:
https://doaj.org/article/7dca0290f33f4ef49daf098278da22b0
Publikováno v:
Toxins, Vol 4, Iss 11, Pp 1367-1384 (2012)
Cnidaria is a rich phylum that includes thousands of marine species. In this study, we focused on Anthozoa and Hydrozoa that are represented by the Nematostella vectensis (Sea anemone) and Hydra magnipapillata genomes. We present a method for ranking
Externí odkaz:
https://doaj.org/article/bfed6283bce9465c897d0a29cbadca76
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 501:4266-4275
Many massive stars appear to undergo enhanced mass loss during late stages of their evolution. In some cases, the ejected mass likely originates from non-terminal explosive outbursts, rather than continuous winds. Here we study the dependence of the