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We use high signal-to-noise ratio long-slit spectra in the 3600-4700A range of the twenty brightest northern Seyfert 2 galaxies to study the variation of the stellar population properties as a function of distance from the nucleus. In order…

We explore 7.5 billion years of evolution in the star formation activity of massive ($M_{\star}>10^{10.1}\,M_{\odot}$) cluster galaxies using a sample of 25 clusters over $0.15<z<1$ from the Cluster Lensing And Supernova survey with Hubble…

Astrophysics of Galaxies · Physics 2017-01-04 Cory R. Wagner , Stephane Courteau , Mark Brodwin , S. A. Stanford , Gregory F. Snyder , Daniel Stern

We present a catalog of near-infrared surveys of young (<= a few 10^6 yr) stellar groups and clusters within 1 kpc from the Sun, based on an extensive search of the literature from the past ten years. We find 143 surveys from 69 published…

Here we discuss impacts of distance determinations on the Galactic disk traced by relatively young objects. The Galactic disk, about 40 kpc in diameter, is a cross-road of studies on the methods of measuring distances, interstellar…

Solar and Stellar Astrophysics · Physics 2018-05-16 Noriyuki Matsunaga , Giuseppe Bono , Xiaodian Chen , Richard de Grijs , Laura Inno , Shogo Nishiyama

We have pursued two different methods to analyze the old stellar population near the Galactic plane, using data from the 2MASS survey. The first method is based on the isolation of the red clump giant population in the color-magnitude…

Astrophysics · Physics 2009-11-07 M. Lopez-Corredoira , A. Cabrera-Lavers , F. Garzon , P. L. Hammersley

We interpret published CCD UBVI data to deduce the stellar density distribution and metallicity distribution function in the region from 2-8 kpc from the Galactic Plane, and compare our results to several star count models. A feature of…

Astrophysics · Physics 2009-11-07 S. Karaali , S. G. Ak , S. Bilir , Y. Karatas , G. Gilmore

Using the optical data from the Wide component of the CFHT Legacy Survey, and new ultraviolet data from GALEX, we study the colours and specific star formation rates (SSFR) of ~100 galaxy clusters at 0.16<z<0.36, over areas extending out to…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Ting Lu , David Gilbank , Sean McGee , Michael Balogh , Sarah Gallagher

Knowledge of both the global star formation history of the universe and the nature of individual star-forming galaxies at different look-back times is essential to our understanding of galaxy formation and evolution. Deep redshift surveys…

Astrophysics · Physics 2009-11-10 S. Pascual

The galaxy cluster CLG0218.3-0510 at z=1.62 is one of the most distant galaxy clusters known, with a rich muti-wavelength data set that confirms a mature galaxy population already in place. Using very deep, wide area (20x20 Mpc) imaging by…

The Milky Way nuclear star cluster (NSC) is located within the nuclear stellar disc (NSD) in the Galactic centre. It is not fully understood if the formation and evolution of these two components are connected, and how they influence each…

Astrophysics of Galaxies · Physics 2022-06-08 A. Feldmeier-Krause

Estimates of the integrated (SFR) and specific (sSFR) rates of star formation are given for 181 galaxies of later Sc, Scd, and Sd types seen almost face-on. Their SFRs were determined from FUV fluxes in the GALEX survey. The median values…

Astrophysics of Galaxies · Physics 2020-06-17 V. E. Karachentseva , I. D. Karachentsev , O. G. Kashibadze

We present large-scale trends in the distribution of star-forming objects revealed by the Hi-GAL survey. As a simple metric probing the prevalence of star formation in Hi-GAL sources, we define the fraction of the total number of Hi-GAL…

Astrophysics of Galaxies · Physics 2016-08-31 S. E. Ragan , T. J. T. Moore , D. J. Eden , M. G. Hoare , D. Elia , S. Molinari

We aim at a detailed description of the kinematic properties of the old, (several Gyrs) late-type CO-absorption star population among the Galactic centre (GC) cluster stars. We applied AO-assisted, near-infrared imaging and integral-field…

Observations have discovered numerous giant molecular filaments (GMFs) in the Milky Way. However, their role in the Galactic star formation and Galaxy-scale evolution of dense gas is still unknown. We investigate systematically the…

Astrophysics of Galaxies · Physics 2019-02-06 Miaomiao Zhang , Jouni Kainulainen , Michael Mattern , Min Fang , Thomas Henning

The star formation rate - stellar mass relation (SFR-M*) and its evolution (i.e., the SFR main sequence) describes the growth rate of galaxies of a given stellar mass and at a given redshift. Assuming that present-day star-forming galaxies…

Cosmology and Nongalactic Astrophysics · Physics 2012-01-17 Samuel N. Leitner

We present new absolute proper motion measurements for the Arches and Quintuplet clusters, two young massive star clusters near the Galactic center. Using multi-epoch HST observations, we construct proper motion catalogs for the Arches…

Astrophysics of Galaxies · Physics 2022-11-09 Matthew W. Hosek , Tuan Do , Jessica R. Lu , Mark R. Morris , Andrea M. Ghez , Gregory D. Martinez , Jay Anderson

We use the method of statistical parallax to constrain the distance-scale zero points and analyze the kinematics of extensive samples of Galactic classical Cepheids, RR Lyrae type variables, and blue horizontal branch stars, which serve as…

Astrophysics of Galaxies · Physics 2010-01-12 A. K. Dambis

We analyzed 17 galaxy clusters, and investigated, for the first time, the dependence of the SFR and sSFR as a function of projected distance (as a proxy for environment) and stellar mass for cluster galaxies in an intermediate-to-high…

Astrophysics of Galaxies · Physics 2018-06-01 Tatiana F. Lagana , M. P. ulmer

We report the first high spectral resolution study of 17 M giants kinematically confirmed to lie within a few parsecs of the Galactic Center, using R=24,000 spectroscopy from Keck/NIRSPEC and a new linelist for the infrared K band. We…

Astrophysics of Galaxies · Physics 2017-11-29 R. M. Rich , N. Ryde , B. Thorsbro , T. K. Fritz , M. Schultheis , L. Origlia , H. Jönsson

We study the stellar populations, star formation histories and star formation properties for a sample of blue compact dwarf galaxies (BCDs) selected by cross-correlating the Gil de Paz et al. (2003) sample with the Sloan Digital Sky Survey…

Cosmology and Nongalactic Astrophysics · Physics 2015-03-17 Yinghe Zhao , Qiusheng Gu , Yu Gao
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