Results 41 to 50 of about 72,254 (220)

Effects of Biases in Virial Mass Estimation on Cosmic Synchronization of Quasar Accretion

, 2011
Recent work using virial mass estimates and the quasar mass-luminosity plane has yielded several new puzzles regarding quasar accretion, including a sub-Eddington boundary on most quasar accretion, near-independence of the accretion rate from properties ...
Begelman, Blanton, Charles L. Steinhardt, Ferrarese, Gabor, Gebhardt, Grogin, Ho, Jaroszynski, Jester, Kelly, Madau, Marconi, Onken, Peterson, Pierce, Rafiee, Richards, Risaliti, Schneider, Schneider, Schneider, Shen, Soltan, Steinhardt, Thompson, Vestergaard, Wang   +27 more
core   +1 more source

Numerical simulations on the relative importance of starbursts and AGN in ultra-luminous infrared galaxies [PDF]

, 2005
We investigate the relative importance of starbursts and AGN in nuclear activities of ultra-luminous infrared galaxies (ULIRGs) based on chemodynamical simulations combined with spectrophotometric synthesis codes.
Armus, Bahcall, Baldwin, Barger, Barnes, Barnes, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Binney, Binney, Blain, Blake, Bondi, Borne, Borne, Bushouse, Canalizo, Canalizo, Cid Fernandes, Clements, Colina, Colina, Cui, Di Matteo, Disney, Dopita, Faber, Farrah, Floyd, Frank, Gao, Genzel, Gerritsen, Goto, Goto, Hausman, Hennawi, Hernquist, Hopkins, Hoyle, Huo, Hutchings, Imanishi, Iwasawa, Jones, Jonsson, Kauffmann, Kauffmann, Kenji Bekki, Kennicutt, Kennicutt, Kewley, Kraemer, Larson, Liu, Lutz, Magorrian, Matthew Whiting, Mihos, Mihos, Mortlock, Mouri, Murphy, Navarro, Noguchi, Olson, Poggianti, Ponman, Pracy, Rees, Ruffert, Sanders, Sanders, Sanders, Schmidt, Schwarz, Scoville, Shapiro, Shioya, Shioya, Shioya, Shioya, Shioya, Shlosman, Smail, Smail, Smail, Soifer, Solomon, Springel, Springel, Stockton, Sugimoto, Surace, Tacconi, Taniguchi, Thornton, Trentham, Van Den Bergh, Veilleux, Veilleux, Veilleux, Weil, Wielen, Xia, Yasuhiro Shioya, Zheng   +116 more
core   +3 more sources

Jet–Accretion System in the Nearby mJy Radio Galaxies

The Astrophysical Journal, 2021
Abstract It is generally thought that FRII radio galaxies host thin optically thick disks, while FRIs are powered by advection-dominated accretion flows. Sources with an efficient engine are optically classified as high-excitation radio galaxies (HERGs) and those with an inefficient motor as low-excitation radio galaxies (LERGs ...
Paola Grandi, Eleonora Torresi, Duccio Macconi, Bia Boccardi, Alessandro Capetti   +4 more
openaire   +3 more sources

Programming Next‐Generation Synthetic Biosensors by Genetic Circuit Design

Advanced Science, EarlyView.
Synthetic biology enables genetic circuit‐based biosensing to detect diverse targets, process signals, and transduce them into readable outputs or intracellular regulatory activities. However, field deployment and real‐world application of such synthetic biosensors face considerable challenges in sensitivity, specificity, speed, stability, and ...
Yuanli Gao, Cheng Huang, Jiaxuan Deng, Lei Wang, Baojun Wang   +4 more
wiley   +1 more source

Radiating Bondi and Cooling Site Flows

, 2012
Steady accretion of a radiating gas onto a central mass point is described and compared to classic Bondi accretion. Radiation losses are essential for accretion flows to be observed. Unlike Bondi flows, radiating Bondi flows pass through a sonic point at
Bondi, Brighenti, Donahue, Fabian, Fulai Guo, Guo, Humphrey, Humphrey, Johansson, Kim, Mathews, McNamara, Park, Quataert, Rafferty, William G. Mathews   +15 more
core   +1 more source

RADIATIVELY INEFFICIENT ACCRETION IN NEARBY GALAXIES

The Astrophysical Journal, 2009
To appear in ApJ, 15 pages, 4 ...
openaire   +2 more sources

A WARM MODE OF GAS ACCRETION ON FORMING GALAXIES [PDF]

The Astrophysical Journal, 2012
We present results from high--resolution cosmological hydrodynamical simulations of a Milky--Way-sized halo, aimed at studying the effect of feedback on the nature of gas accretion. Simulations include a model of inter-stellar medium and star formation, in which SN explosions provide effective thermal feedback. We distinguish between gas accretion onto
Murante G., Calabrese M., De Lucia G., MONACO, Pierluigi, BORGANI, STEFANO, Dolag K.   +5 more
openaire   +3 more sources

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, EarlyView.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source

Disk Galaxy Models Driven by Stochastic Self-Propagating Star Formation

Open Astronomy, 2010
We present a model of chemical and spectrophotometric evolution of disk galaxies based on a stochastic self-propagating star formation scenario. The model incorporates galaxy formation through the process of accretion, chemical and photometric evolution ...
Mineikis T., Vansevičius V.
doaj   +1 more source

Gas accretion on to galaxies and Kelvin–Helmholtz turbulence

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACTContinued star formation over the lifetime of a galaxy suggests that gas is steadily flowing in from the circumgalactic medium. Also, cosmological simulations of large-scale structure formation imply that gas is accreted on to galaxies from the halo inside which they formed.
Itzhak Goldman, Robert Fleck
openaire   +2 more sources