Results 31 to 40 of about 52,268 (222)

The LEGARE Project

Astronomy & Astrophysics
Context. The nuclear stellar disc (NSD) of the Milky Way is a dense, rotating stellar system in the central ~200 pc. The NSD is thought to be primarily fuelled by bar-driven gas inflows from the inner Galactic disc. Aims.
Spitoni E., Schultheis M., Matteucci F., Ryde N., Cescutti G., Saro A., Sormani M. C., Thorsbro B.   +7 more
doaj   +1 more source

Element Abundances In Nearby Galaxies [PDF]

, 2004
In these lectures I present a highly opinionated review of the observed patterns of metallicity and element abundance ratios in nearby spiral, irregular, and dwarf elliptical galaxies, with connection to a number of astrophysical issues associated with chemical evolution.
openaire   +2 more sources

Abundances in 78 metal-rich bulge spheroid stars from APOGEE

Astronomy & Astrophysics
Context. The inner Galaxy is the most complex region of the Milky Way, comprising the early bulge, inner thin and thick discs, and inner halo stars; moreover, the formation of the bar caused transfer of gas and stars from the disc to the inner Galaxy ...
Ernandes H., Barbuy B., Chiappini C., Feltzing S., Pérez-Villegas A., Friaça A. C. S., Souza S. O., Nunes R. P., Queiroz A. B. A., Fernández-Trincado J. G., Rocha de Abreu A. L., Plotnikova A.   +11 more
doaj   +1 more source

Chemical abundances of LINER galaxies – nitrogen abundance estimations

Monthly Notices of the Royal Astronomical Society
ABSTRACT In this work, we investigated the nitrogen and oxygen abundances in a sample of galaxies with Low Ionization Nuclear Emission Regions (LINERs) in their nucleus. Optical spectroscopic data (3600 – 10 000 Å) of 40 LINERs from the Mapping Nearby Galaxies (MaNGAs) survey were considered.
C B Oliveira, Â. C. Krabbe, O. L. Dors, I. A. Zinchenko, J. A. Hernández-Jiménez, M. V. Cardaci, G. F. Hägele, Gabriele S Ilha   +7 more
openaire   +3 more sources

Abundance ratios in hierarchical galaxy formation [PDF]

Astrophysics and Space Science, 1999
7 pages, 3 figures, accepted by ...
openaire   +5 more sources

Photometric Objects Around Cosmic Webs (PAC) Delineated in a Spectroscopic Survey. IV. High-precision Constraints on the Evolution of the Stellar–Halo Mass Relation at Redshift z < 0.7

The Astrophysical Journal, 2023
Taking advantage of the Photometric objects Around Cosmic webs method developed in Paper I, we measure the excess surface density ${\bar{n}}_{2}{w}_{{\rm{p}}}$ of the photometric objects around spectroscopic objects down to stellar masses 10 ^8.0 M _ ...
Kun Xu, Y. P. Jing, Yun Zheng, Hongyu Gao   +3 more
doaj   +1 more source

The Iron Discrepancy in Elliptical Galaxies after ASCA [PDF]

, 1996
We present estimates for the iron content of the stellar and diffused components of elliptical galaxies, as derived respectively from integrated optical spectra and from ASCA X-ray observations. A macroscopic discrepancy emerges between the expected iron
Alvio Renzini, Arimoto N., Arnaud M., Awaki H., Bica E., Binney J., Cappellaro E., Carlberg R., Carollo C. M., Davies R. L., de Vaucouleurs G., Della Valle M., Efstathiou G., Elbaz D., Fabian A. C., Fujimoto R., Fukazawa Y., Gorgas J., Gratton R., Greggio L., Greggio L., Hearnshaw J. B., Holt S. S., Itoh H., Kovacs N., Kritsuk A. G., Kyoko Matsushita, Larson R. B., Larson R. B., Makishima K., Matteucci F., Matteucci F., Mewe R., Mewe R., Miyata E., Nobuo Arimoto, Ohashi T., Pellegrini S., Ruiz-Lapuente P., Takaya Ohashi, Tanaka Y., Tinsley B. M., Ueno S., van den Bergh S., Yuhri Ishimaru   +44 more
core   +2 more sources

Two chemically similar stellar overdensities on opposite sides of the plane of the Galaxy [PDF]

, 2018
Our Galaxy is thought to have undergone an active evolutionary history dominated by star formation, the accretion of cold gas, and, in particular, mergers up to 10 gigayear ago.
A Helmi, A Helmi, A Kunder, A Mucciarelli, A Smette, AA Sheffield, Adrian M. Price-Whelan, Aldo M. Serenelli, Allyson Sheffield, AM Amarsi, AM Price-Whelan, AM Serenelli, Andrew Gould, B Gustafsson, B Lemasle, B Letarte, Branimir Sesar, CE Dorman, Chervin F. P. Laporte, CW Purcell, D Yong, E Stonkute, E Tolstoy, EF Bell, EN Kirby, FA Gómez, GR Ruchti, HJ Rocha-Pinto, J Bovy, JA Valenti, JE Lawler, JG Cohen, JS Bullock, Judith G. Cohen, K Freeman, K Lind, K Lind, Kathryn V. Johnston, KV Johnston, L Casagrande, L Casagrande, L Magrini, L Sbordone, Luca Casagrande, M Asplund, M Bergemann, M Bergemann, M Bergemann, M Odenkirchen, M Shetrone, M Van Hove, Maria Bergemann, MW Feast, NF Martin, P Villemoes, P Villemoes, PE Nissen, PF Weck, PJ Storey, R Gratton, R Schönrich, Ralph Schönrich, RE Silverans, S Kazantzidis, S Sharma, SA Korotin, SS Vogt, SV Ramírez, T Bensby, Ting S. Li, TS Li, V Kovtyukh, W Freudling, XX Xue, Y Xu   +74 more
core   +3 more sources

Distribution of iron, oxygen, and sulfur in the direction of the outer arms of the Galaxy★

Astronomy & Astrophysics
Aims. We conducted a high-resolution spectroscopic study of 51 distant Cepheids located in the outer part of the Galactic disk in the direction of the Perseus Arm.
Andrievsky S. M., Martin R. P., Korotin S. A.   +2 more
doaj   +1 more source

Planetary nebulae in the inner Milky Way: new abundances [PDF]

, 2009
The study of planetary nebulae in the inner-disk and bulge gives important information on the chemical abundances of elements such as He, N, O, Ar, Ne, and on the evolution of these abundances, which is associated with the evolution of intermediate-mass ...
Cavichia, O., Costa, R. D. D., Maciel, W. J.   +2 more
core   +2 more sources