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Related papers: The inner Galactic bar traced by the VVV survey

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The structural parameters of the disk of the Large Magellanic Cloud (LMC) are estimated.We used the red clump stars from the VI photometric data of the Optical Gravitational Lensing Experiment survey and from the Magellanic Cloud…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Smitha Subramanian , Annapurni Subramaniam

We present a luminosity function (LF) for lower main sequence stars in the Galactic bulge near (l,b)=(0,-6) to J=24, corresponding to M_J~9.3. This LF is derived from HST + NICMOS observations with the F110W and F160W filters. The main…

Astrophysics · Physics 2009-10-31 M. Zoccali , S. Cassisi , J. A. Frogel , A. Gould , S. Ortolani , A. Renzini , R. M. Rich , A. W. Stephens

I demonstrate that the two unexpected results in the local Universe: 1) anomalous intrinsic (V-I)_0 colors of the clump giants and RR Lyrae stars in the Galactic center, and 2) very short distances to the Magellanic Clouds (LMC, SMC) as…

Astrophysics · Physics 2009-10-31 Piotr Popowski

We have done a detailed study on the structural and kinematical properties of lenticular and early- and late-type spiral galaxies with bars, aiming to explore the formation and evolution processes of stellar bars in galaxies, and their…

Astrophysics · Physics 2009-11-10 Dimitri Alexei Gadotti

We analyze photometric properties of 1384 cluster galaxies as a function of the normalized distance to cluster center. These galaxies were selected in the central region ($r/r_{200} \leq$ 0.8) of 14 southern Abell clusters chosen from the…

Astrophysics · Physics 2009-11-11 V. Coenda , H. Muriel , C. J. Donzelli , H. Quintana , L. Infante , D. G. Lambas

The red-giant branch bump provides valuable information for the investigation of the internal structure of low-mass stars. Because current models are unable to accurately predict the occurrence and efficiency of mixing processes beyond…

Solar and Stellar Astrophysics · Physics 2018-06-27 Saniya Khan , Oliver J. Hall , Andrea Miglio , Guy R. Davies , Benoît Mosser , Léo Girardi , Josefina Montalbán

The discovery of new clear windows in the Galactic plane using the VVV near-IR extinction maps allows the study of the structure of the Milky Way (MW) disk. The ultimate goal of this work is to map the spiral arms in the far side of the MW,…

Astrophysics of Galaxies · Physics 2022-09-21 R. Kammers , R. K. Saito , E. Botan , D. Minniti , J. Alonso-García , L. C. Smith , P. W. Lucas

We studied the stellar population in the central 6.6x6.6arcmin,region of the ultra-deep (1Msec) Chandra Galactic field - the "Chandra bulge field" (CBF) approximately 1.5 degrees away from the Galactic Center - using the Hubble Space…

Astrophysics of Galaxies · Physics 2015-05-18 M. Revnivtsev , M. van den Berg , R. Burenin , J. E. Grindlay , D. Karasev , W. Forman

We present a study of the shape of the Large Magellanic Cloud disk. We use the brightnesses of core helium-burning red clump stars identified in V-I,I color-magnitude diagrams of 50 randomly selected LMC fields, observed with the CTIO 0.9-m…

Astrophysics · Physics 2007-05-23 K. A. G. Olsen , C. Salyk

Hierarchical galaxy formation models make specific predictions concerning the relative assembly rates and star formation histories of spiral bulges and field ellipticals. Independently of the cosmological model and initial power spectrum of…

Astrophysics · Physics 2009-10-31 Richard S. Ellis , Roberto G. Abraham , Mark Dickinson

We investigate the evolution of the optical and near-infrared colour-magnitude relation in an homogeneous sample of massive clusters from z = 1 to the present epoch. By comparing deep Hubble Space Telescope ACS imaging of X-ray selected…

Cosmology and Nongalactic Astrophysics · Physics 2012-03-15 J. P. Stott , K. A. Pimbblet , A. C. Edge , G. P. Smith , J. L. Wardlow

The Milky Way is widely considered to exhibit features of a rotational bar or quadrupole bar. In either case, the feature of the resonance of the Galactic bar should be present in the properties of the chemistry and kinematics, over a large…

Astrophysics of Galaxies · Physics 2024-04-09 Weixiang Sun , Han Shen , Biwei Jiang , Xiaowei Liu

Images recorded through J, H, K, 2.2 micron continuum and CO filters have been obtained of a sample of metal-poor ([Fe/H] < -1.3) globular clusters in the inner spheroid of the Galaxy. The shape and color of the upper giant branch on the…

Astrophysics · Physics 2009-10-31 T. J. Davidge

Context: Young massive clusters are key to map the Milky Way's structure, and near-IR large area sky surveys have contributed strongly to the discovery of new obscured massive stellar clusters. Aims: We present the third article in a series…

I use distance- and mass-limited subsamples of the Spitzer Survey of Stellar Structure in Galaxies (S4G) to investigate how the presence of bars in spiral galaxies depends on mass, colour, and gas content and whether large, SDSS-based…

Astrophysics of Galaxies · Physics 2018-01-10 Peter Erwin

This investigation presents a photometric study of the Galactic structure toward the Carina arm tangent. The field is located between 280 deg and 286 deg galactic longitude and -4 deg to 4 deg galactic latitude. All currently available…

Astrophysics of Galaxies · Physics 2013-07-17 N. Kaltcheva , V. Golev

We derive deep $I$ band luminosity functions and colour-magnitude diagrams from HST imaging for eleven $0.2<z<0.6$ clusters observed at various stages of merging, and a comparison sample of five more relaxed clusters at similar redshifts.…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 R. De Propris , S. Phillipps , M. Bremer

We investigate the relations between the properties of bars and their host galaxies in a sample of 77 nearby barred galaxies, spanning a wide range of morphological types and luminosities, with 34 SB0-SBa and 43 SBab-SBc galaxies. The…

Astrophysics of Galaxies · Physics 2020-09-23 Virginia Cuomo , J. Alfonso L. Aguerri , Enrico Maria Corsini , Victor P. Debattista

This paper presents the results of a high-resolution imaging survey, using both ground-based and Hubble Space Telescope images, of a complete sample of nearby barred S0--Sa galaxies in the field, with a particular emphasis on identifying…

Astrophysics · Physics 2008-11-26 Peter Erwin , Linda S. Sparke

We analyse V and H-band surface photometry of a sample of 18 Sb-Sd galaxies. Combining high resolution HST images with ground-based NIR observations, we extract photometric profiles, which cover the whole disk and provide the highest…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-13 Katia Ganda , Reynier Peletier , Marc Balcells , Jesus Falcon-Barroso