Results 71 to 80 of about 208,454 (264)

THE AGE OF THE YOUNG BULGE-LIKE POPULATION IN THE STELLAR SYSTEM TERZAN 5: LINKING THE GALACTIC BULGE TO THE HIGH-Z UNIVERSE [PDF]

, 2016
The Galactic bulge is dominated by an old, metal-rich stellar population. The possible presence and the amount of a young (a few gigayears old) minor component is one of the major issues debated in the literature.
F. Ferraro, D. Massari, E. Dalessandro, B. Lanzoni, L. Origlia, R. Rich, A. Mucciarelli   +6 more
semanticscholar   +1 more source

The Chemical Composition of the Galactic Bulge and Implications for its Evolution [PDF]

Publications Astronomical Society of Australia, 2016
At a bulge latitude of b = −4°, the average [Fe/H] and [Mg/H] values are +0.06 and +0.17 dex, roughly 0.2 and 0.7 dex higher than the local thin and thick disk values, respectively, suggesting a large bulge effective yield, perhaps due to efficient ...
A. McWilliam
semanticscholar   +1 more source

The Structure, Populations, and Kinematics of the Milky Way Central and Inner Bulge with OGLE, APOGEE, and Gaia Data

The Astrophysical Journal
We present an analysis of the structure, kinematics, and chemo-dynamical properties of the Milky Way bulge using RR Lyrae stars from Optical Gravitational Lensing Experiment (OGLE), and giant stars from APOGEE and Gaia that have distances placing them in
Xiao Han, Hai-Feng Wang, Giovanni Carraro, Martín López-Corredoira, Yuan-Sen Ting, Yang-Ping Luo, Guan-Yu Wang, (MWLUDPSG Collaboration)   +7 more
doaj   +1 more source

Elemental abundances in AGB stars and the formation of the Galactic bulge

EPJ Web of Conferences, 2012
We obtained high-resolution near-IR spectra of 45 AGB stars located in the Galactic bulge. The aim of the project is to determine key elemental abundances in these stars to help constrain the formation history of the bulge.
Wood P.R., Ryde N., Lebzelter T., Blommaert J.A.D.L., Uttenthaler S., Schultheis M., Aringer B.   +6 more
doaj   +1 more source

When the Stars Align: A 5σ Concordance of Planetary Nebulae Major Axes in the Center of Our Galaxy

The Astrophysical Journal Letters, 2023
We report observations of a remarkable major axes alignment nearly parallel to the Galactic plane of 5 σ significance for a subset of bulge “planetary nebulae” (PNe) that host, or are inferred to host, short-period binaries. Nearly all are bipolar. It is
Shuyu Tan, Quentin A. Parker, Albert A. Zijlstra, Andreas Ritter, Bryan Rees   +4 more
doaj   +1 more source

The populations of planetary nebulae in the direction of the Galactic bulge

, 2004
We have observed 44 planetary nebulae (PNe) in the direction of the Galactic bulge, and merged our data with published ones. We have distinguished, in the merged sample of 164 PNe, those PNe most likely to prtain physically to the Galactic bulge and ...
A. V. Escudero, Acker, Acker, Beaulieu, Beaulieu, Blöcker, Blöcker, Chiappini, Crowther, Cuisinier, de Araújo, De Marco, Durand, Escudero, Escudero, G. Stasińska, Górny, Górny, Górny, Herwig, Hu, Iben, Keenan, Kohoutek, Leuenhagen, Leuenhagen, Liu, Maciel, Maciel, Marigo, Parker, Peña, Peña, R. D. D. Costa, S. K. Górny, Seaton, Smartt, Stasinska, Stasinska, Stasinska, Stasinska, Tylenda, Tylenda, Tylenda, van der Hucht, Zijlstra, Zoccali   +46 more
core   +2 more sources

Testing the universal stellar IMF on the metallicity distribution in the bulges of the Milky Way and M31 [PDF]

, 2007
We test whether the universal initial mass function (UIMF) or the integrated galaxial IMF (IGIMF) can be employed to explain the metallicity distribution (MD) of giants in the Galactic bulge.
Ballero, Ballero, Baugh, Baumgardt, Bromm, Chabrier, Chiappini, Elmegreen, F. Matteucci, Ferreras, Figer, François, Fulbright, Immeli, Kim, Koen, Kroupa, Kuijken, Larson, Massey, Massey, Matteucci, Matteucci, Matteucci, Matteucci, McWilliam, Nakamura, Nomoto, Oey, Okamoto, P. Kroupa, Padoan, Paresce, Piotto, Rich, Rich, S. K. Ballero, Salaris, Salpeter, Samland, Sarajedini, Scalo, Schaerer, Schwarzschild, Tosi, Weidner, Weidner, Zoccali, Zoccali   +48 more
core   +3 more sources

Flux Tube Properties and Interchange Instabilities in Jupiter's Middle Magnetosphere

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract In Jupiter's magnetosphere, the outward transport of Io‐genic plasma and the planetward injection of energetic particles are facilitated by flux tube interchange motion driven by centrifugal instabilities. Flux tube content and entropy are two competing key quantities that determine the behavior of the system.
Jian‐Zhao Wang, Fran Bagenal, Simon Wing, Peter A. Delamere, Xuanye Ma, Robert J. Wilson, Robert W. Ebert, Philip W. Valek, Frederic Allegrini, Vincent Dols, Licia C. Ray, Chynna Spitler, George Clark, Barry H. Mauk   +13 more
wiley   +1 more source

Galactic bulge population II Cepheids in the VVV survey: Period-luminosity relations and a distance to the Galactic centre [PDF]

, 2017
We present the near-infrared observations of population II Cepheids in the Galactic bulge from VVV survey. We identify 340 population II Cepheids in the Galactic bulge from VVV survey based on their match with OGLE-III Catalogue.
A. Bhardwaj, M. Rejkuba, D. Minniti, F. Surot, E. Valenti, M. Zoccali, O. Gonzalez, M. Romaniello, S. Kanbur, H. Singh   +9 more
semanticscholar   +1 more source

Are the Distribution of Einstein Crossing Times of Galactic Microlensing Events Bimodal? [PDF]

Journal of Astronomy and Space Sciences, 2012
The observed distribution of a blending-corrected sample of Einstein ring crossing times, tE, for microlensing events toward the galactic bulge/bar are analyzed.
Mitchell F. Struble, Thulsi Wickramasinghe   +1 more
doaj   +1 more source