Results 1 to 10 of about 324,246 (376)

X-ray Insight into High-Energy Processes in Extreme Galactic Nuclear Environment

Universe, 2022
Nuclear regions of galaxies apparently play a disproportionately large role in regulating their formation and evolution. How this regulation works, however, remains very uncertain.
Q. Daniel Wang
doaj   +1 more source

Afterglow Light Curves from Off-Axis GRB Jets in Stratified Circumburst Medium

Universe, 2022
We study the gamma-ray burst (GRB) afterglow light curves produced by an off-axis jet in a stratified circumburst medium and summarize the temporal indices of the coasting phase, the deceleration phase, the Newtonian phase, and the deep Newtonian phase ...
Xiao-Hong Zhao, Kang-Fa Cheng
doaj   +1 more source

Instability in the Magnetized Accretion Disks with Outflows in the Presence of Self-Gravity [PDF]

Iranian Journal of Astronomy and Astrophysics, 2022
We study the stability of a model of magnetized accretion disk, in whichoutflows play a significant role in driving the inflow, and magnetic field is generated bya dynamo operating in the disk.
Sekine Karimzadeh, Alireza Khesali, Azar Khosravi   +2 more
doaj   +1 more source

Cosmic Ray Processes in Galactic Ecosystems

Galaxies, 2023
Galaxy evolution is an important topic, and our physical understanding must be complete to establish a correct picture. This includes a thorough treatment of feedback.
Ellis R. Owen, Kinwah Wu, Yoshiyuki Inoue, H.-Y. Karen Yang, Alison M. W. Mitchell   +4 more
doaj   +1 more source

Deconstructing the Characteristics of the Ionized Gas Component in Planetary Nebulae From Their Internal Motions

Frontiers in Astronomy and Space Sciences, 2022
The internal motions of the ionized gas in the shells of planetary nebulae (PNe) have served as relevant diagnostic tools to understand the development of this important stage of stellar evolution.
J. A. López
doaj   +1 more source

Dense Molecular Environments of B[e] Supergiants and Yellow Hypergiants

Galaxies, 2023
Massive stars expel large amounts of mass during their late evolutionary phases. We aim to unveil the physical conditions within the warm molecular environments of B[e] supergiants (B[e]SGs) and yellow hypergiants (YHGs), which are known to be embedded ...
Michaela Kraus, Michalis Kourniotis, María Laura Arias, Andrea F. Torres, Dieter H. Nickeler   +4 more
doaj   +1 more source

Unveiling the Evolutionary State of Three B Supergiant Stars: PU Gem, ϵ CMa, and η CMa

Galaxies, 2023
We aim to combine asteroseismology, spectroscopy, and evolutionary models to establish a comprehensive picture of the evolution of Galactic blue supergiant stars (BSG). To start such an investigation, we selected three BSG candidates for our analysis: HD
Julieta Paz Sánchez Arias, Péter Németh, Elisson Saldanha da Gama de Almeida, Matias Agustin Ruiz Diaz, Michaela Kraus, Maximiliano Haucke   +5 more
doaj   +1 more source

Ionised outflows in z $\sim$ 2.4 quasar host galaxies [PDF]

, 2015
AGN-driven outflows are invoked by galaxy evolutionary models to quench star formation and to explain the origin of the relations observed locally between super massive black holes and their host galaxies.
Balmaverde, B., Brusa, M., Cano-Díaz, M., Carniani, S., Cicone, C., Comastri, A., Cresci, G., Feruglio, C., Fiore, F., La Franca, F., Mainieri, V., Maiolino, R., Mannucci, F., Marconi, A., Nagao, T., Netzer, H., Piconcelli, E., Risaliti, G., Schneider, R., Shemmer, O.   +19 more
core   +3 more sources

Modeling of the Wind/Disk Outflow from Be Stars

Universe, 2021
The objective of this work is to reproduce the formation of the fast polar wind and viscous disk outflow from Be stars in a unified physical picture. Numerical modeling of the plasma outflow from fast rotating stars was performed taking into account the ...
Sergey Bogovalov, Maxim Petrov
doaj   +1 more source

Direct Evidence for Termination of Obscured Star Formation by Radiatively Driven Outflows in Reddened QSOs [PDF]

, 2011
We present optical to far-infrared photometry of 31 reddened QSOs that show evidence for radiatively driven outflows originating from AGN in their rest-frame UV spectra.
Alexander, Ammons, Andreas Efstathiou, Arav, Arav, Bautista, Becker, Benson, Best, Bower, Bower, Braito, Carol Lonsdale, Carrie Bridge, Casebeer, Chapman, Chartas, Chatterjee, Chung, Ciotti, Colin Borys, Dai, Debuhr, Desai, Dopita, Duncan Farrah, Dunn, Efstathiou, Ellis, Fabian, Farrah, Farrah, Farrah, Farrah, Ferrarese, Ferrarese, Gallagher, Genzel, Gibson, Granato, Granato, Gregg, Hall, Hambrick, Häring, Ilbert, Jahnke, Jarrett, Jose Afonso, Kormendy, Kristen Coppin, Kruegel, Lacy, Le Floc'h, Leighly, Lewis, Lutz, Lutz, Ma, Magorrian, Marchesini, Marconi, Mark Lacy, Menci, Moe, Müller-Sánchez, Nenkova, Ostriker, Patrick B. Hall, Peterson, Proga, Puchwein, Pérez-González, Rakos, Rieke, Roseboom, Rowan-Robinson, Rowan-Robinson, Rupke, Sara Petty, Schawinski, Schmidt, Shields, Shin, Short, Shupe, Silk, Silva, Skrutskie, Snyder, Spoon, Sturm, Tanya Urrutia, Tom Jarrett, Tombesi, Tremaine, Trump, Urrutia, Veilleux, Wagner, Werner, Wright, Wyithe, Xu, York   +104 more
core   +3 more sources