Results 111 to 120 of about 4,353 (224)

Inner galactic disc metallicity distributions and the bulge-disc relation

EPJ Web of Conferences, 2012
The intermediate-to-old population of the inner galactic disk remains a relatively uncharted territory. We present the results of a high resolution spectroscopic survey of over 200 red clump stars in the inner galactic disc (3–5 kpc from the galactic ...
Haywood M., Gómez A., Babusiaux C., Hill V., Katz D., Royer F.   +5 more
doaj   +1 more source

Nucleosynthesis of Cobalt and Copper

Galaxies
Chemical abundances of cobalt (Co; Z = 27) and copper (Cu; Z = 29) in bulge and halo stars are presented and compared with chemical evolution models.
Beatriz Barbuy, Amâncio C. S. Friaça, Heitor Ernandes   +2 more
doaj   +1 more source

Ancient Relic Moderately Metal-rich Bulge Cluster Tonantzintla 2

The Astrophysical Journal Letters
The assembly history of the Galactic bulge is intimately tied to the formation of the proto–Milky Way, yet reconstructing this early phase is difficult because mergers and secular evolution have erased most of its original structure.
Sergio Ortolani, Stefano O. Souza, Domenico Nardiello, Beatriz Barbuy, Eduardo Bica, Bernardo P.L. Ferreira, Cristina Chiappini, José G. Fernández-Trincado, Heitor Ernandes   +8 more
doaj   +1 more source

OH/IR stars in the inner Galactic bulge

Astronomy & Astrophysics
Context. Stars on the asymptotic giant branch (AGB) play important roles in a number of astronomical contexts. To quantify these roles, it is necessary to establish the mass-loss characteristics of stars as they evolve up and beyond the AGB. Aims.
Olofsson H., Khouri T., Muller S., Unnikrishnan R., Groenewegen M. A. T., Blommaert J. A. D. L., De Beck E., Kastner J. H., Maercker M., Patel N., Ryde N., Sargent B. A., Srinivasan S., Vlemmings W. H. T.   +13 more
doaj   +1 more source

Interstellar extinction towards the inner Galactic Bulge

, 1999
4 pages, 4 figures, accepted for publication in A&A as a letter, see also http://www-denis.iap.fr/articles/extinction/DENIS observations in the J (1.2 micron) and K_S (2.15 micron) bands together with isochrones calculated for the RGB and AGB phase are ...
Simon, Grégory, Fouque, P., Omont, A., Borsenberger, J., Copet, E., Schultheis, M., Epchtein, N., Ganesh, S., Alard, C., Simon, G., Habing, H.   +10 more
core  

RR Lyrae binary systems in the Galactic bulge

EPJ Web of Conferences, 2017
The possibility of a direct mass measurement of RR Lyrae variable stars in binary systems has remained elusive for many years, due to the apparent paucity of such systems.
Hajdu Gergely, Catelan Márcio
doaj   +1 more source

Gaia: new perspectives in understanding the galactic bulge

, 2010
Although the Milky Way bulge is our closest opportunity to study in detail such a complex chemo-dynamical system, its formation and evolution is still poorly understood.
Babusiaux, Carine, C. Babusiaux
core   +1 more source

Einstein@Home Searches for Gamma-Ray Pulsars in the Inner Galaxy

The Astrophysical Journal
The Fermi Large Area Telescope (LAT) has revealed a mysterious extended excess of GeV gamma-ray emission around the Galactic Center (GC), which can potentially be explained by unresolved emission from a population of pulsars, particularly millisecond ...
C. J. Clark, M. Di Mauro, J. Wu, B. Allen, O. Behnke, H. B. Eggenstein, B. Machenschalk, L. Nieder, P. M. Saz Parkinson, A. Ashok, P. Bruel, B. McGloughlin, M. A. Papa, F. Camilo, M. Kerr, P. Voraganti Padmanabh, S. M. Ransom   +16 more
doaj   +1 more source

Formation Models of the Galactic Bulge

, 2014
The Galactic bulge is now considered to be the inner three-dimensional part of the Milky Way's bar. It has a peanut shape and is characterized by cylindrical rotation. In N-body simulations, box/peanut bulges arise from disks through bar and buckling instabilities.
openaire   +3 more sources

Is the Galactic bulge shining in gamma rays?

, 2019
Data from the Fermi Large Area Telescope indicates that there is an extended source of GeV gamma-ray photons coming from the Galactic Centre. Initially, it was thought that this could be due to self-annihilating dark matter.
Gordon, Chris, Gordon, Chris (6471416)
core   +1 more source