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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…

宇宙学与河外天体物理 · 物理学 2009-11-13 Katia Ganda , Reynier Peletier , Marc Balcells , Jesus Falcon-Barroso

We study the rest-frame ultraviolet-optical color gradients of 441 galaxies at $4<z<8$ by characterizing the wavelength dependence of their structural parameters derived from simultaneously fitting the seven-band NIRCam images acquired with…

星系天体物理 · 物理学 2025-09-22 Bingcheng Jin , Luis C. Ho , Wen Sun

In this paper, we use photometric data from the S-PLUS DR4 survey to identify isolated galaxy pairs and analyse their characteristics and properties. Our results align with previous spectroscopic studies, particularly in luminosity function…

Central galaxies (CGs) in galaxy groups and clusters are believed to form and assemble a good portion of their stellar mass at early times, but they also accrete significant mass at late times via galactic cannibalism, that is merging with…

星系天体物理 · 物理学 2017-01-25 Carlo Nipoti

We present a new method to classify galaxies from large surveys like the Sloan Digital Sky Survey using inclination-corrected concentration, inclination-corrected location on the color-magnitude diagram, and apparent axis ratio. Explicitly…

天体物理学 · 物理学 2009-11-13 Jeremy Bailin , William E. Harris

Using the Early Data Release of the Sloan Digital Sky Survey (SDSS) we investigated the clustering properties of Low Surface Brightness (LSB) galaxies in comparison to normal, High Surface Brightness (HSB) galaxies. We selected LSB galaxies…

天体物理学 · 物理学 2009-11-10 S. D. Rosenbaum , D. J. Bomans

Observations have shown that the spatial distribution of satellite galaxies is not random, but aligned with the major axes of central galaxies. This alignment is dependent on galaxy properties, such that red satellites are more strongly…

宇宙学与河外天体物理 · 物理学 2014-04-11 Yang Ocean Wang , Weipeng Lin , Xi Kang , Aaron Dutton , Yu Yu , Andrea. V. Macciò

We use publicly available galaxy merger trees, obtained applying semi-analytic techniques to a large high resolution cosmological simulation, to study the environmental history of group and cluster galaxies. Our results highlight the…

宇宙学与河外天体物理 · 物理学 2015-06-03 Gabriella De Lucia , Simone Weinmann , Bianca Poggianti , Alfonso Aragon-Salamanca , Dennis Zaritsky

We quantify the quenching impact of the group environment using the spectroscopic survey Galaxy and Mass Assembly (GAMA) to z=0.2. The fraction of red (quiescent) galaxies, whether in groups or isolated, increases with both stellar mass and…

We conduct a comprehensive and statistical study of the luminosity functions (LFs) for satellite galaxies, by counting photometric galaxies from HSC, DECaLS and SDSS around isolated central galaxies (ICGs) and paired galaxies from the…

We analyse the Fundamental Plane (FP) relation of $39,993$ early-type galaxies (ETGs) in the optical (griz) and $5,080$ ETGs in the Near-Infrared (YJHK) wavebands, forming an optical$+$NIR sample of $4,589$ galaxies. We focus on the…

宇宙学与河外天体物理 · 物理学 2015-05-18 F. La Barbera , P. A. A. Lopes , R. R. de Carvalho , I. G. de la Rosa , A. A. Berlind

Accretion of minor satellites has been postulated as the most likely mechanism to explain the significant size evolution of the massive galaxies over cosmic time. Using a sample of 629 massive (Mstar~10^11 Msun) galaxies from the…

宇宙学与河外天体物理 · 物理学 2015-06-03 E. Mármol-Queraltó , I. Trujillo , P. G. Pérez-González , J. Varela , G. Barro

With the aim to assess the role of dense environments in galaxy interactions, properties we present an analysis of close galaxy pairs in groups and clusters, obtained from the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7). We…

宇宙学与河外天体物理 · 物理学 2015-06-03 Sol Alonso , Valeria Mesa , Nelson Padilla , Diego G. Lambas

We study the properties of building blocks (BBs, i.e. accreted satellites) and surviving satellites of present-day galaxies using the SAG semi-analytic model of galaxy formation in the context of a concordance Lambda Cold Dark Matter (LCDM)…

宇宙学与河外天体物理 · 物理学 2015-05-13 Claudia del P. Lagos , Nelson D. Padilla , Sofia A. Cora

[Abridged] We study the spectral properties of intermediate mass galaxies as a function of colour and morphology. We use Galaxy Zoo to define three morphological classes of galaxies, namely early-types (ellipticals), late-type…

We study the correlation between the specific star formation rate of central galaxies and neighbour galaxies, also known as 'galactic conformity', out to 20 Mpc/h using three semi-analytic models (SAMs, one from L-GALAXIES and other two…

星系天体物理 · 物理学 2018-01-31 Ivan Lacerna , Sergio Contreras , Roberto E. González , Nelson Padilla , Violeta Gonzalez-Perez

Using a large galaxy group catalogue constructed from the Sloan Digital Sky Survey Data Release 4 (SDSS DR4) with an adaptive halo-based group finder, we investigate the luminosity and stellar mass functions for different populations of…

天体物理学 · 物理学 2014-11-18 Xiaohu Yang , H. J. Mo , Frank C. van den Bosch

We study the abundance of satellite galaxies as a function of primary stellar mass using the SDSS/DR7 spectroscopic catalogue. In contrast with previous studies, which focussed mainly on bright primaries, our central galaxies span a wide…

宇宙学与河外天体物理 · 物理学 2015-06-11 Laura V. Sales , Wenting Wang , Simon D. M. White , Julio F. Navarro

We examine the origins of the bimodality observed in the global properties of galaxies around a stellar mass of 3x10^10 M_sun by comparing the environmental dependencies of star-formation for the giant and dwarf galaxy populations. The…

天体物理学 · 物理学 2009-11-11 C. P. Haines , F. La Barbera , A. Mercurio , P. Merluzzi , G. Busarello

We investigate how star formation quenching proceeds within central and satellite galaxies using spatially resolved spectroscopy from the SDSS-IV MaNGA DR15. We adopt a complete sample of star formation rate surface densities ($\Sigma_{\rm…

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