Results 101 to 110 of about 21,097,663 (248)

Herpetofauna of Katerniaghat Wildlife Sanctuary, Uttar Pradesh, India

Journal of Threatened Taxa, 2012
A herpetofaunal inventory based on field surveys, literature records and photographic records is presented for Katerniaghat Wildlife Sanctuary and its environs, situated in the Terai region of Uttar Pradesh, India.
Abhijit Das, Dhruvajyoti Basu, Laurel Converse, Su-resh C Choudhury   +3 more
doaj   +1 more source

Resolved magnetic-field structure and variability near the event horizon of Sagittarius A* [PDF]

, 2015
Michael D. Johnson, Vincent L. Fish, Sheperd S. Doeleman, Daniel P. Marrone, R. L. Plambeck, J. F. C. Wardle, Kazunori Akiyama, Keiichi Asada, Christopher Beaudoin, Lindy Blackburn, Ray Blundell, Geoffrey C. Bower, Christiaan D. Brinkerink, Avery E. Broderick, R. J. Cappallo, Andrew Chael, G. Crew, Jason Dexter, Matt Dexter, R. Freund, Per Friberg, Roman Gold, Mark Gurwell, Paul T. P. Ho, Mareki Honma, Makoto Inoue, Michael Kosowsky, T. P. Krichbaum, James W. Lamb, Abraham Loeb, Ru-Sen Lu, David H. E. MacMahon, Jonathan C. McKinney, J. M. Moran, Ramesh Narayan, Rurik A. Primiani, Dimitrios Psaltis, A. E. E. Rogers, Katherine Rosenfeld, Jason Soohoo, R. P. J. Tilanus, Michael Titus, Laura Vertatschitsch, Jonathan Weintroub, M. C. H. Wright, Ken Young, J. A. Zensus, L. M. Ziurys   +47 more
openalex   +1 more source

A wide angle view of the Sagittarius dwarf spheroidal galaxy [PDF]

, 2010
G. Giuffrida, L. Sbordone, S. Zaggia, G. Marconi, P. Bonifacio, C. Izzo, T. Szeifert, R. Buonanno   +7 more
openalex   +1 more source

An OGLE view of the bulge and Sagittarius [PDF]

, 2013
Shoko Jin, E. K. Grebel, Raoul Haschke
openalex   +1 more source

Properties of H2O Masers and Their Associated Sources in Sagittarius B2

The Astrophysical Journal
We present high-resolution Karl G. Jansky Very Large Array observations of the 22 GHz H _2 O maser line in the extended Sagittarius B2 cloud. We detect 499 H _2 O masers across the observed velocities between −39 and 172 km s ^−1 .
Nazar Budaiev, Adam Ginsburg, Ciriaco Goddi, Álvaro Sánchez-Monge, Anika Schmiedeke, Desmond Jeff, Peter Schilke, Christopher De Pree   +7 more
doaj   +1 more source

Radio Variability of Sagittarius A*—a 106 Day Cycle

The Astrophysical Journal, 2001
We report the presence of a 106-day cycle in the radio variability of Sgr A* based on an analysis of data observed with the Very Large Array (VLA) over the past 20 years. The pulsed signal is most clearly seen at 1.3 cm with a ratio of cycle frequency to frequency width f/Delta_f= 2.2+/-0.3. The periodic signal is also clearly observed at 2 cm.
Zhao, Jun-Hui, Bower, G. C., Goss, W. M.
openaire   +2 more sources

Bounds on ultralight bosons from the Event Horizon Telescope observation of Sgr A $$^*$$ ∗

European Physical Journal C: Particles and Fields
Recent observation of Sagittarius A $$^*$$ ∗ (Sgr A $$^*$$ ∗ ) by the Event Horizon Telescope (EHT) collaboration has uncovered various unanswered questions in black hole (BH) physics.
Akash Kumar Saha, Priyank Parashari, Tarak Nath Maity, Abhishek Dubey, Subhadip Bouri, Ranjan Laha   +5 more
doaj   +1 more source

A past capture event at Sagittarius A* inferred from the fluorescent X-ray emission of Sagittarius B clouds [PDF]

, 2010
Yun-Wei Yu, K. S. Cheng, D. O. Chernyshov, V. A. Dogiel   +3 more
openalex   +1 more source

Dark Drag Around Sagittarius A*

We analyze the effect of Dark Matter (DM) - Standard Model (SM) non-gravitational interactions on the orbital dynamics of celestial bodies near the supermassive black hole Sagittarius A*, where the DM density is generically expected to be high. We outline the conditions under which a DM-SM scattering channel gives rise to a drag force on objects in ...
Acevedo, Javier F., Reilly, Aidan J., Santos-Olmsted, Lillian   +2 more
openaire   +2 more sources

Sagittarius A* in the Infrared

Journal of Physics: Conference Series, 2012
The central black hole of the Milky Way, Sagittarius A* (SgrA*) is, in terms of Eddington luminosity, the weakest accreting object of its class accessible to detailed observations. It is therefore key to the refinement of theoretical models of radiatively inefficient accretion.
openaire   +1 more source