Structure of the super-Eddington outflow and its impact on the cosmological scale
نویسندگان
چکیده
It is one of the biggest issues in black hole (BH) astrophysics how to precisely evaluate BH feedback its environments. Aiming at studying unique gas dynamics super-Eddington flow around supermassive (SMBH) seeds high redshift, we carried out axisymmetric two dimensional radiation hydrodynamic simulations by a nested simulation-box method. Here divide simulation box into inner zone $(2 - 3 \times 10^3) r_{\rm{Sch}}$ (with $r_{\rm Sch}$ being Schwarzschild radius) and outer $(2\times 10^{3} 3\times 10^6) r_{\rm{Sch}}$, with smooth connection physical quantities, such as density, velocity, energy. We start calculation injecting mass through boundary constant rate $\dot{M}_{\rm{inj}}=10^3L_{\rm{Edd}}/c^2$, where $L_{\rm{Edd}}$ Eddington luminosity $c$ speed light. A powerful outflow generated innermost region it propagates from zone. The outflows are characterized velocity 0.02$c$ (0.7$c$) density $10^{-17}$ ($10^{-19}$) g cm$^{-3}$ for near edge-on (face-on) direction. gradually accelerated travels accepting radiation-pressure force. final outermost $\dot{M}_{\rm{out}}\sim 0.3 \dot{M}_{\rm{inj}}$. By extrapolating structure further larger scale, find that momentum energy fluxes $r \sim 0.1$ pc $\sim 10-100 L_{\rm{Edd}}/c $ 0.1-10 L_{\rm{Edd}}$, respectively. Moreover, impacts highly anisotropic sense given towards face-on direction than These results indicate will more efficiently work on interstellar medium assumed cosmological simulations.
منابع مشابه
the geopolitics of afghanistan after september 11, 2001, and its impact on iranian national security
abstract u.s. attack to afghanistan after 9/11 provided opportunities for us who tried to become the dominant power after collapse of ussr and bipolar world. thinkers like fukuyama believed american liberal democrats thought would be universally accepted without resistances. liberal democracy is the best and final model of governance; in this regard, united state has moral responsibilities for...
15 صفحه اولthe u.s. policy in central asia and its impact on the colored revolutions in the region (the case study of tulip revolution in kyrgyzstan)
چکیده ندارد.
15 صفحه اولan investigation of the impact of self monitoring on langauge teachers motivational practice and its effect on learners motivation
the central purpose of this study was to conduct a case study about the role of self monitoring in teacher’s use of motivational strategies. furthermore it focused on how these strategies affected students’ motivational behavior. although many studies have been done to investigate teachers’ motivational strategies use (cheng & d?rnyei, 2007; d?rnyei & csizer, 1998; green, 2001, guilloteaux & d?...
the impact of attending efl classes on the level of depression of iranian female learners and their attributional complexity
می توان گفت واقعیت چند لایه ا ی کلاس های زبان انگلیسی بسیار حائز اهمیت است، زیرا عواطف و بینش های زبان آموزان تحت تاثیر قرار می گیرد. در پژوهش پیش رو، گفته می شود که دبیران با در پیش گرفتن رویکرد فرا-انسانگرایی ، قادرند در زندگی دانش آموزانشان نقش مهمی را ایفا سازند. بر اساس گفته ی ویلیامز و بردن (2000)، برای کرل راجرز، یکی از بنیان گذاران رویکرد انسانگرایی ، یادگیری بر مبنای تجربه، نوعی از یاد...
the impact of morphological awareness on the vocabulary development of the iranian efl students
this study investigated the impact of explicit instruction of morphemic analysis and synthesis on the vocabulary development of the students. the participants were 90 junior high school students divided into two experimental groups and one control group. morphological awareness techniques (analysis/synthesis) and conventional techniques were used to teach vocabulary in the experimental groups a...
15 صفحه اولذخیره 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: Publications of the Astronomical Society of Japan
سال: 2022
ISSN: ['2053-051X', '0004-6264']
DOI: https://doi.org/10.1093/pasj/psac001