Results 31 to 40 of about 35,709 (214)

A clustering-based search for substructures in the Galactic plane and bulge using RR Lyrae stars as tracers

Astronomy & Astrophysics
Context. Although many globular clusters (GCs) have been identified in the Galaxy, their population is estimated to be incomplete, especially in regions with significant crowding and/or interstellar extinction, such as the Galactic bulge and plane.
Cristi-Cambiaso N., Navarrete C., Catelan M., Zoccali M., Quezada C.   +4 more
doaj   +1 more source

Natures of a clump-origin bulge: a pseudobulge-like but old metal-rich bulge

, 2011
Bulges in spiral galaxies have been supposed to be classified into two types: classical bulges or pseudobulges. Classical bulges are thought to form by galactic merger with bursty star formation, whereas pseudobulges are suggested to form by secular ...
Abadi, Agertz, Allende Prieto, Alves-Brito, Athanassoula, Aumer, Babusiaux, Baron, Bate, Bekki, Bensby, Bensby, Bensby, Bensby, Bensby, Bica, Binny, Bouché, Bournaud, Bournaud, Bournaud, Brook, Brook, Bullock, Burkert, Burstein, Cappellari, Ceverino, Ceverino, Combes, Combes, de Vaucouleurs, Debattista, Drory, Dutton, Dwek, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Erwin, Fall, Ferreras, Fisher, Fisher, Fisher, Fisher, Fisher, Frogel, Fulbright, Genel, Genzel, Gonzalez, Gonzalez, Hill, Hopkins, Howard, Hubber, Immeli, Immeli, Inoue, Ivezić, Jablonka, Johnson, Katz, Kaufmann, Kaufmann, Kent, Kent, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Krumholz, Lecureur, Makino, McWilliam, McWilliam, Meléndez, Monaghan, Naab, Nagashima, Nakasato, Nataf, Navarro, Navarro, Navarro, Noguchi, Noguchi, Noguchi, Ohta, Okamoto, Okamoto, Peletier, Pfenniger, Quinn, Rahimi, Rich, Ruchti, Ryde, Saha, Sahu, Saito, Saitoh, Saitoh, Saitoh, Saitoh, Salpeter, Sawala, Schmidt, Sellwood, Shigeki Inoue, Springel, Takayuki R. Saitoh, Terndrup, Terndrup, Thoul, Thoul, Toomre, van den Bergh, van den Bergh, Wada, Williams, Wyse, Zoccali, Zoccali   +129 more
core   +1 more source

Chemical Abundances in Galactic Bulge Pn [PDF]

Symposium - International Astronomical Union, 1993
We present abundance determinations, in particular of carbon, and C/O ratios, for 11 Galactic bulge planetary nebulae (PN) based on our low resolution UV data from IUE observations and optical spectrophotometry from the Anglo-Australian Telescope. We compare the observed abundances with those predicted by dredge-up theory for the high metallicity ...
N. A. Walton, M. J. Barlow, R. E. S. Clegg   +2 more
openaire   +1 more source

Supermassive black holes in galactic bulges [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2008
Abstract Growing evidence indicate supermassive black holes (SMBHs) in a mass range of MBH∼ 106–1010 M⊙ lurking in central stellar bulges of galaxies. Extensive observations reveal fairly tight power laws of MBH versus the mean stellar velocity dispersion σ of the host stellar bulge.
Lou, Yu-Qing, Jiang, Yan-Fei
openaire   +2 more sources

Reddening and metallicity maps of the Milky Way bulge from VVV and 2MASS III. The first global photometric metallicity map of the Galactic bulge

, 2013
We investigate the large scale metallicity distribution in the Galactic bulge, using a large spatial coverage, in order to constrain the bulge formation scenario.
Gonzalez, O. A., Minniti, D., Rejkuba, M., Tobar, R., Valenti, E., Zoccali, M.   +5 more
core   +1 more source

Parameters of Six Selected Galactic Potential Models

Open Astronomy, 2017
This paper is devoted to the refinement of the parameters of the six three-component (bulge, disk, halo) axisymmetric Galactic gravitational potential models on the basis of modern data on circular velocities of Galactic objects located at distances up ...
Bajkova Anisa, Bobylev Vadim
doaj   +1 more source

RR Lyrae Variables as Tracers of the Galactic Bulge Kinematic Structure

Universe, 2022
RR Lyrae stars are recognized as some of the oldest stars in the Universe. In addition, they are some of the few old celestial objects for which distances can be reliably inferred.
Andrea M. Kunder
doaj   +1 more source

Infrared Scanning of the Galactic Bulge [PDF]

Symposium - International Astronomical Union, 1985
We find values of the interstellar absorption from J, H and K scans of a 6.8 × 200 arcmin strip of sky extending from the Sgr I field to the Galactic Centre. The visual absorption, excluding dark clouds, increases from 3 to 30 magnitudes in this region.
R. M. Catchpole, P. A. Whitelock, I. S. Glass   +2 more
openaire   +1 more source

Emergent Spin Fluctuation and Structural Metastability in Self‐Intercalated Cr1+xTe2${\rm Cr}_{1+x}{\rm Te}_2$ Compounds

Advanced Electronic Materials, EarlyView.
Metastable superstructure and emergent spin fluctuation in self‐intercalated Cr1+xTe2${\rm Cr}_{1+x}{\rm Te}_2$ ABSTRACT Intercalated van der Waals (vdW) magnetic materials host unique magnetic properties due to the interplay of competing interlayer and intralayer exchange couplings, which depend on the intercalant concentration within the van der ...
Clayton Conner, Ali Sarikhani, Theo Volz, Mathew Pollard, Mitchel Vaninger, Xiaoqing He, Steven Kelley, Jacob Cook, Avinash Sah, John Clark, Hunter Lucker, Cheng Zhang, Paul Miceli, Yew San Hor, Xiaoqian Zhang, Guang Bian   +15 more
wiley   +1 more source

The Complex Structure of the Bulge of M31

The Astrophysical Journal Supplement Series, 2023
The bulge of M31 is of interest regarding the nature of galactic bulges and how their structure relates to bulge formation mechanisms and their subsequent evolution.
Denis Leahy, Traian Craiciu, Joseph Postma   +2 more
doaj   +1 more source