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We present the results of a photometric study of the early-type galaxy NGC 6876 and the surrounding globular cluster system (GCS). The host galaxy is a massive elliptical, the brightest of this type in the Pavo Group. According to its…

Astrophysics of Galaxies · Physics 2019-07-05 Ana Inés Ennis , Lilia Patricia Bassino , Juan Pablo Caso , Bruno Javier De Bórtoli

Context: There is strong evidence that globular cluster systems (GCSs) of massive galaxies are largely assembled by infall/accretion processes. Therefore, we expect the GCSs of isolated elliptical galaxies to be poor. Alhough not completely…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 J. P. Caso , T. Richtler , L. P. Bassino , R. Salinas , R. R. Lane , A. Romanowsky

We present the first photometric study of the globular cluster system (GCS) of the E galaxy NGC 3613 (Mv = -21.5, d = 30.1 Mpc), as well as the surface photometry of the host galaxy, based on Gemini/GMOS images. Being considered the central…

Astrophysics of Galaxies · Physics 2020-05-28 Bruno J. De Bórtoli , Lilia P. Bassino , Juan P. Caso , Ana I. Ennis

We analyse colours of the nuclear regions of intermediate redshift disk galaxies, with the aim of obtaining empirical information of relative ages of bulges and disks at 0.1 < z < 1.3. We work with an apparent-diameter limited parent sample…

Astrophysics · Physics 2009-11-13 Lilian Dominguez-Palmero , Marc Balcells

(Abridged for arXiv) The history of the mass assembly of brightest cluster galaxies may be studied by the mapping the stellar populations at large radial distances from the galaxy centre. We provide extended and robust measurements of the…

Neutral gas is commonly believed to dominate over stars in the outskirts of galaxies, and investigations of the disk-halo interface are generally considered to be in the domain of radio astronomy. This may simply be a consequence of the…

Astrophysics of Galaxies · Physics 2018-03-28 Jielai Zhang , Roberto Abraham , Pieter van Dokkum , Allison Merritt , Steven Janssens

We present a new identity card for the cluster NGC 6440 in the Galactic Bulge. We have used a combination of high-resolution Hubble Space Telescope images, wide-field ground-based observations performed with the ESO-FORS2, and the public…

AIMS: The main goal of this work is to study possible signs of asymmetry in the bright optical transient in NGC300, with the aim of getting independent information on the explosion mechanism, the progenitor star and its circumstellar…

Solar and Stellar Astrophysics · Physics 2015-05-13 F. Patat , J. R. Maund , S. Benetti , M. -T. Botticella , E. Cappellaro , A. Harutyunyan , M. Turatto

We study massive disk galaxies (stellar mass $>=10^{11}\mathrm{M_{\odot}}$) at z=0 from IllustrisTNG simulation to detect galaxies that contain two exponential stellar disks - a central high surface brightness (HSB) disk surrounded by an…

Astrophysics of Galaxies · Physics 2025-04-22 Suchira Sarkar , Kanak Saha

The radial density profiles of stellar galaxy discs can be well approximated as an exponential. Compared to this canonical form, however, the profiles in the majority of disc galaxies show downward or upward breaks at large radii.…

MWC 297 is a young massive nearby B[e] star. The central star has a large projected rotational velocity of 350 km/s. Despite the wealth of published observations, the nature of this object and its dust-rich surroundings is not well…

NGC3201 is a globular cluster (GC) which shows very peculiar kinematic characteristics including an extreme radial velocity and a highly retrograde orbit, strongly suggesting an extraGalactic origin. Our aims are to study NGC3201 in the…

Astrophysics of Galaxies · Physics 2015-06-15 C. Muñoz , D. Geisler , S. Villanova

The distributions of size and luminosity for star-forming regions in the nearby spiral galaxy NGC 628 are studied over a wide range of scales using progressively blurred versions of an image from the Hubble Space Telescope Advanced Camera…

We present the results of a new and improved study of the morphological and spectral evolution of massive galaxies over the redshift range 1<z<3. Our analysis is based on a bulge-disk decomposition of 396 galaxies with Mstar>10^11 Msolar…

The stellar contents of six intermediate mass early-type disk galaxies in the Virgo cluster are examined using deep long slit spectra. The isophotal and photometric properties of the galaxies at near- and mid-infrared wavelengths are also…

Astrophysics of Galaxies · Physics 2018-11-07 T. J. Davidge

The exponential profile has long been hypothesized as the fundamental morphology of galactic disks. The IllustrisTNG simulations reproduce diverse surface-density profiles: Type I (single exponential), Type II (down-bending), and Type III…

Astrophysics of Galaxies · Physics 2026-04-30 Liufei Chen , Min Du , Shuai Lu , Jing Li , Luis C. Ho

We are studying the mass distribution in a sample of 50 early type spiral galaxies, with morphological type betweens S0 and Sab and absolute magnitudes M_B between -18 and -22; they form the massive and high-surface brightness extreme of…

Astrophysics · Physics 2007-05-23 E. Noordermeer , J. M. van der Hulst , R. Sancisi , R. A. Swaters , .

We analyze the vertical distribution of the resolved stellar populations in six low-mass, edge-on, spiral galaxies observed with the Hubble Space Telescope Advanced Camera for Surveys. In each galaxy we find evidence for an extraplanar…

Astrophysics · Physics 2008-11-26 Anil C. Seth , Julianne J. Dalcanton , Roelof S. de Jong

Globular Clusters (GCs) and Nuclear Star Clusters (NSCs) are typically composed by several stellar populations, characterized by different chemical compositions. Different populations show different ages in NSCs but not necessarily in GCs.…

Astrophysics of Galaxies · Physics 2016-06-01 Alessandra Mastrobuono-Battisti , Hagai B. Perets

By undertaking deep long-slit spectroscopy with the focal reducer SCORPIO of the Russian 6m telescope, we studied stellar population properties and their variation with radius in 15 nearby S0 galaxies sampling a wide range of luminosities…

Cosmology and Nongalactic Astrophysics · Physics 2023-02-01 O. K. Sil'chenko , I. S. Proshina , A. P. Shulga , S. E. Koposov