Results 31 to 40 of about 32,885 (244)

Sagittarius Tidal Debris 90 kpc from the Galactic Center

, 2003
A new overdensity of A-colored stars in distant parts of the Milky Way's stellar halo, at a dereddened SDSS magnitude of g_0 = 20.3, is presented. Identification of associated variable RR Lyrae candidates supports the claim that these are blue horizontal
Brinkmann, Jon, Grebel, Eva K., Hennessy, Greg, Ivezic, Zeljko, Lamb, Don Q., Martinez-Delgado, David, Newberg, Heidi Jo, Odenkirchen, Michael, Rix, Hans-Walter, Schneider, Donald P., Yanny, Brian, York, Donald G.   +11 more
core   +1 more source

The distance and neutral environment of the massive stellar cluster Westerlund 1 [PDF]

, 2006
The goal of this study is to determine a distance to Westerlund 1 independent of the characteristics of the stellar population and to study its neutral environment, using observations of atomic hydrogen.
Karkowski, J., Malec, E., Roszkowski , K.   +2 more
core   +3 more sources

Testing alternative theories of gravity by fitting the hot-spot data of Sgr A*

European Physical Journal C: Particles and Fields, 2022
We are fitting dynamics of electrically neutral hot-spot orbiting around Sagittarius A* (Sgr A*) source in Galactic center, represented by various modifications of the standard Kerr black hole (BH), to the three flares observed by the GRAVITY instrument ...
Misbah Shahzadi, Martin Kološ, Zdeněk Stuchlík, Yousaf Habib   +3 more
doaj   +1 more source

Red Clump Stars in the Sagittarius Tidal Streams

, 2012
We have probed a section (l ~ 150, b ~ -60) of the trailing tidal arm of the Sagittarius dwarf spheroidal galaxy by identifying a sample of Red Clump stream stars.
Carrell, Kenneth, Chen, Yuqin, Wilhelm, Ronald   +2 more
core   +1 more source

Sagittarius-A and the Philosophical Black Hole: What Lies at the Center?

Turkish Academic Research Review
Whether considered from a theological perspective or through the lens of classical physics, human beings have historically been placed at the center of the universe. Other living beings are deemed significant insofar as they contribute to the survival of
Ömer Fatih Tekin
doaj   +1 more source

Determining the Magnetic Field in the Galactic Plane from New Arecibo Pulsar Faraday Rotation Measurements

The Astrophysical Journal
We develop a new method for studying the Galactic magnetic field along the spiral arms using pulsar Faraday rotation measures (RMs). Our new technique accounts for the dot-product nature of Faraday rotation and also splits the associated path integral ...
Alice P. Curtin, Joel M. Weisberg, Joanna M. Rankin   +2 more
doaj   +1 more source

Prospects for a Dark Matter annihilation signal towards the Sagittarius dwarf galaxy with ground based Cherenkov telescopes

, 2011
Dwarf galaxies are widely believed to be among the best targets for indirect dark matter searches using high-energy gamma rays; and indeed gamma-ray emission from these objects has long been a subject of detailed study for ground-based atmospheric ...
A. Viana, Abdo, Acciari, Aharonian, Albert, Aleksic, Aliu, B. Peyaud, Bellazzini, Belokurov, Bergström, Bringmann, Cheng, Cherenkov Telescope Array, Di Pierro, E. Moulin, Ferrarese, HESS, Ibata, Ibata, J. F. Glicenstein, J. Peñarrubia, K. Kosack, Lanzoni, Law, M. C. Medina, M. Naumann-Godo, MAGIC, Majewski, Majewski, Martinez-Delgado, Martinez-Delgado, Mateo, Newberg, Niederste-Ostholt, Noyola, P. Brun, Paz Arribas, Peñarrubia, Peñarrubia, Peñarrubia, Venter, Venter, VERITAS, Vivas, Walker, Wood, Yanny, Łokas   +48 more
core   +1 more source

The extended structure of the dwarf irregular galaxy Sagittarius [PDF]

, 2014
We present a detailed study of the stellar and HI structure of the dwarf irregular galaxy Sagittarius. We use new deep and wide field photometry to trace the surface brightness profile of the galaxy out to ~5.0' (corresponding to ~1600 pc) and down to ...
Battaglia, G., Beccari, G., Bellazzini, M., Fraternali, F., Galleti, S., Oosterloo, T. A., Perina, S., Sollima, A., Testa, V.   +8 more
core   +3 more sources

On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way

The Astronomical Journal
We report measurements of trigonometric parallax and proper motion for two 6.7 GHz methanol and two 22 GHz water masers located in the far portion of the Sagittarius spiral arm as part of the BeSSeL Survey.
S. B. Bian, Y. W. Wu, Y. Xu, M. J. Reid, J. J. Li, B. Zhang, K. M. Menten, L. Moscadelli, A. Brunthaler   +8 more
doaj   +1 more source

GALACTIC CENTER MINISPIRAL: INTERACTION MODES OF NEUTRON STARS

Acta Polytechnica, 2015
Streams of gas and dust in the inner parsec of the Galactic center form a distinct feature known as the Minispiral, which has been studied in radio waveband as well as in the infrared wavebands.
Michal Zajacek, Vladimir Karas, Devaky Kunneriath   +2 more
doaj   +1 more source