Results 61 to 70 of about 32,885 (244)

Detailed Chemical Evolution of Carina and Sagittarius Dwarf Spheroidal Galaxies

, 2006
In order to verify the effects of the most recent data on the evolution of Carina and Sagittarius Dwarf Spheroidal Galaxies (dSph) and to set tight constraints on the main parameters of chemical evolution models, we study in detail the chemical evolution
Aloisi, Bonifacio, Bonifacio, Busso, Carigi, Cescutti, Chiappini, Chiappini, Chiappini, Dolphin, F. Matteucci, François, G. A. Lanfranchi, G. Cescutti, Geisler, Greggio, Grevesse, Harbeck, Hernandez, Hurley-Keller, Ikuta, Kawata, Lanfranchi, Lanfranchi, Lanfranchi, Mateo, Matteucci, Matteucci, Matteucci, Matteucci, Matteucci, Meynet, Monaco, Nomoto, Renzini, Rizzi, Sadakane, Salpeter, Schmidt, Shetrone, Shetrone, Smecker-Hane, Thielemann, Tinsley, Tolstoy, Tolstoy, Van den Hoeck, Venn, Woosley, Woosley   +49 more
core   +1 more source

Protostellar Cores in Sagittarius B2 N and M

The Astrophysical Journal
We present 500 and 700 au resolution 1 and 3 mm Atacama Large Millimeter/submillimeter Array observations, respectively, of protostellar cores in protoclusters Sagittarius B2 (Sgr B2) North (N) and Main (M), parts of the most actively star-forming cloud ...
Nazar Budaiev, Adam Ginsburg, Desmond Jeff, Ciriaco Goddi, Fanyi Meng, Álvaro Sánchez-Monge, Peter Schilke, Anika Schmiedeke, Taehwa Yoo   +8 more
doaj   +1 more source

Evidence for coupling between the Sagittarius dwarf galaxy and the Milky Way warp [PDF]

, 2003
Using recent determinations of the mass and orbit of Sagittarius, I calculate its orbital angular momentum. From the latest observational data, I also calculate the angular momentum of the Milky Way's warp.
Battaner E., Binney J., Drimmel R., Ibata R. A., Jeremy Bailin, Lynden-Bell D., Ostriker E. C., Reshetnikov V., Sparke L. S.   +8 more
core   +3 more sources

Dynamical Inference from Polarized Light Curves of Sagittarius A*

The Astrophysical Journal
Polarimetric light curves of Sagittarius A* (Sgr A*) sometimes exhibit loops in the Stokes Q and U plane over time, often interpreted as orbiting hotspot motion. In this work, we apply the differential geometry of planar curves to develop a new technique
Angelo Ricarte, Nicholas S. Conroy, Maciek Wielgus, Daniel C. M. Palumbo, Razieh Emami, Chi-Kwan Chan   +5 more
doaj   +1 more source

Soft gamma-ray constraints on a bright flare from the Galactic Center supermassive black hole

, 2009
Sagittarius A* (Sgr A*) is the supermassive black hole residing at the center of the Milky Way. It has been the main target of an extensive multiwavelength campaign we carried out in April 2007.
A. Goldwurm, Aitken, Baganoff, Baganoff, Baganoff, Balick, Bélanger, Bélanger, Bélanger, Chiar, Clénet, Cotera, Courvoisier, D. Porquet, Degenaar, Do, Doeleman, E. Pantin, Eckart, Eckart, Eckart, Eckart, Eckart, Eisenhauer, F. Melia, F. Yusef-Zadeh, Falanga, Falanga, Ferrando, G. Bélanger, G. Trap, Genzel, Ghez, Ghez, Ghez, Ghez, Gillessen, Goldwurm, Goldwurm, Goldwurm, Goldwurm, Haubois, Herrnstein, Hinton, Hornstein, Jansen, K. Dodds-Eden, Krabbe, Krawczynski, Lagage, Lebrun, Lenzen, Liu, Liu, Liu, Liu, Lund, Lutz, Markoff, Marrone, Melia, Melia, Meyer, Meyer, Meyer, Morris, N. Grosso, P. Ferrando, P.O. Lagage, Pantin, Porquet, Porquet, R. Genzel, R. Terrier, Reid, Reid, Revnivtsev, Revnivtsev, Rousset, Rybicki, S. Gillessen, Schödel, Schödel, Stolovy, Tagger, Telesco, Trippe, Tsuboi, Ubertini, Wang, Westergaard, Winkler, Yuan, Yuan, Yusef-Zadeh, Yusef-Zadeh, Yusef-Zadeh, Zhao, Zhao, Zylka, Čadež   +100 more
core   +3 more sources

Tomographic Imaging of the Sagittarius Spiral Arm's Magnetic Field Structure

The Astrophysical Journal
The Galactic global magnetic field is thought to play a vital role in shaping Galactic structures such as spiral arms and giant molecular clouds. However, our knowledge of magnetic field structures in the Galactic plane at different distances is limited,
Yasuo Doi, Kengo Nakamura, Koji S. Kawabata, Masafumi Matsumura, Hiroshi Akitaya, Simon Coudé, Claudia V. Rodrigues, Jungmi Kwon, Motohide Tamura, Mehrnoosh Tahani, Antonio Mario Magalhães, Reinaldo Santos-Lima, Yenifer Angarita, José Versteeg, Marijke Haverkorn, Tetsuo Hasegawa, Sarah Sadavoy, Doris Arzoumanian, Pierre Bastien   +18 more
doaj   +1 more source

Neutron-Capture Element Abundances in Planetary Nebulae

Galaxies, 2020
Nebular spectroscopy is a valuable tool for assessing the production of heavy elements by slow neutron(n)-capture nucleosynthesis (the s-process). Several transitions of n-capture elements have been identified in planetary nebulae (PNe) in the last few ...
N. C. Sterling
doaj   +1 more source

M 54 + Sagittarius = omega Centauri

, 2010
We derive homogeneous abundances of Fe, O, Na and alpha-elements from high resolution FLAMES spectra for 76 red giant stars in NGC 6715 (M 54) and for 25 red giants in the surrounding nucleus of the Sagittarius (Sgr) dwarf galaxy. Our main findings are that: (i) we confirm that M 54 shows intrinsic metallicity dispersion, ~0.19 dex r.m.s.; (ii) when ...
Carretta E, Bragaglia A, Gratton RG, Lucatello S, Bellazzini M, CATANZARO, GIOVANNI, LEONE, Francesco, Momany Y, Piotto G, D'Orazi V.   +9 more
openaire   +3 more sources

Inside the Stagnation Radius of the Nearest Billion-solar-mass Black Hole

The Astrophysical Journal
We used the NSF Jansky Very Large Array at a frequency ν  = 22 GHz to study the nearest billion-solar-mass black hole (BH), in the early-type galaxy NGC 3115 at a distance of 9.7 Mpc.
J. M. Wrobel, D. W. Pesce, K. E. Nyland
doaj   +1 more source

Physical Properties and Galactic Distribution of Molecular Clouds identified in the Galactic Ring Survey

, 2010
We derive the physical properties of 580 molecular clouds based on their 12CO and 13CO line emission detected in the University of Massachusetts-Stony Brook (UMSB) and Galactic Ring surveys.
Allen, Anderson, Bacmann, Benjamin, Benjamin, Bernard, Bloemen, Boulanger, Elmegreen, Falgarone, Federrath, Glover, Goldsmith, Gordon, Heitsch, Heyer, Heyer, Heyer, Jackson, James M. Jackson, Jill Rathborne, Julia Roman-Duval, Kerr, Klessen, Larson, Mandelbrot, Mark Heyer, Oort, Quireza, Rathborne, Rathborne, Reid, Robert Simon, Rohlfs, Roman-Duval, Scalo, Scalo, Simon, Sodroski, Strong, Tasker, Urquhart, Wakker, Whittet, Williams, Williams, Wolfire, Wolfire   +47 more
core   +1 more source