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Related papers: Scaling Relations in Dissipationless Spiral-like G…

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We present revised (black hole mass)-(spheroid stellar mass) and (black hole mass)-(galaxy stellar mass) scaling relations based on colour-dependent stellar mass-to-light ratios. Our 3.6 micron luminosities were obtained from multicomponent…

Astrophysics of Galaxies · Physics 2023-05-08 Alister W. Graham , Nandini Sahu

We present a structural analysis of nearby galaxies in spiral-spiral pairs in optical BVRI bands and compare with the structures of isolated spiral galaxies and galaxies in ongoing mergers. We use these comparisons to determine how galaxy…

Astrophysics · Physics 2009-11-10 H. Hernandez-Toledo , V. Avila-Reese , C. J. Conselice , I. Puerari

We use the Millennium I and II cosmological simulations to revisit the impact of mergers in the growth of bulges in central galaxies in the LCDM scenario. We seed galaxies within the growing CDM haloes using semi-empirical relations to…

Cosmology and Nongalactic Astrophysics · Physics 2013-11-26 Jesus Zavala , Vladimir Avila-Reese , Claudio Firmani , Michael Boylan-Kolchin

We perform dry merger simulations to investigate the role of dry mergers in the size growth of early-type galaxies in high density environments. We replace the virialized dark matter haloes obtained by a large cosmological $N$-body…

Astrophysics of Galaxies · Physics 2016-01-25 Taira Oogi , Asao Habe , Tomoaki Ishiyama

We develop a galaxy assignment scheme that populates dark matter halos with galaxies by tracing the most bound member particles (MBPs) of simulated halos. Several merger-timescale models based on analytic calculations and numerical…

Astrophysics of Galaxies · Physics 2016-08-11 Sungwook E. Hong , Changbom Park , Juhan Kim

We use dynamical models that include bulk rotation, velocity dispersion anisotropy and both stars and dark matter to explore the conditions that give rise to the early-type galaxy scaling relations referred to as the Fundamental Plane (FP)…

Astrophysics of Galaxies · Physics 2015-11-18 Huanian Zhang , Dennis Zaritsky

Mergers are believed to play a pivotal role in galaxy evolution, and measuring the galaxy merger fraction is a longstanding goal of both observational and theoretical studies. In this work, we extend the consideration of the merger fraction…

Astrophysics of Galaxies · Physics 2025-10-07 Jonathan Mack , Shy Genel

We search for signatures of recent galaxy close interactions and mergers in a sample of 202 early-type galaxies in the local universe from the public SDSS Stripe82 deep images ($\mu_r \sim 28.5$ mag arcsec$^{-2}$). Using two different…

Astrophysics of Galaxies · Physics 2023-02-22 Gourab Giri , Sudhanshu Barway , Somak Raychaudhury

Galaxy mergers are crucial to understanding galaxy evolution, therefore we must determine their observational signatures to select them from large IFU galaxy samples such as MUSE and SAMI. We employ 24 high-resolution idealised…

Merger remnants of small groups of galaxies are contrasted with relics of mergers of pairs of galaxies to determine which process produces objects that best compare to real ellipticals. In both cases, the progenitors consist of…

Astrophysics · Physics 2009-10-28 Melinda L. Weil , Lars Hernquist

We numerically investigate chemodynamical evolution of major disk-disk galaxy mergers in order to explore the origin of mass-dependent chemical, photometric, and spectroscopic properties observed in elliptical galaxies. We particularly…

Astrophysics · Physics 2016-08-30 Kenji Bekki , Yasuhiro Shioya

Utilizing deep Hubble Space Telescope imaging from the two largest field galaxy surveys, the Extended Groth Strip (EGS) and the COSMOS survey, we examine the structural properties, and derive the merger history for 21,902 galaxies with…

Astrophysics · Physics 2009-11-13 Christopher J. Conselice , Cui Yang , Asa F. L. Bluck

We use deep r-band photometry and Halpha rotation curves for a sample of 290 late-type spirals to model their mass distribution within the optical radius. We examine luminosity profile decompositions into bulge and disk carefully and…

Astrophysics · Physics 2007-05-23 Adrick H. Broeils , Stephane Courteau

Using three fiducial Nbody+SPH simulations, we follow the merging of two disk galaxies with a hot gaseous halo component each, and examine whether the merger remnant can be a spiral galaxy. The stellar progenitor disks are destroyed by…

Astrophysics of Galaxies · Physics 2016-04-27 E. Athanassoula , S. A. Rodionov , N. Peschken , J. C. Lambert

We study the evolution of black holes (BHs) on the M_BH-sigma and M_BH-M_bulge planes as a function of time in disk galaxies undergoing mergers. We begin the simulations with the progenitor black hole masses being initially below (Delta log…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Peter H. Johansson , Andreas Burkert , Thorsten Naab

We present image-based evolution of galaxy mergers from the Illustris cosmological simulation at 12 time-steps over 0.5 < z < 5. To do so, we created approximately one million synthetic deep Hubble Space Telescope and James Webb Space…

We present a study of galaxy mergers and the influence of environment in the Abell 901/902 supercluster at z~0.165. We use HST ACS F606W data from the STAGES survey, COMBO-17, Spitzer 24um, and XMM-Newton X-ray data. Our analysis utilizes…

Lenticular galaxies (S0s) are more likely to host antitruncated (Type-III) stellar discs than galaxies of later Hubble types. Major mergers are popularly considered too violent mechanisms to form these breaks. We have investigated whether…

We have developed an effective simulation method and applied it to the problem of the accretion of very dense secondary companions by tenuous primaries. We have studied the accretion of objects of varying luminosity ratios, with sizes and…

Astrophysics · Physics 2009-10-31 Kelly Holley-Bockelmann , Douglas O. Richstone

We present a mid-IR investigation of the scaling relations between supermassive black hole masses (MBH) and the structural parameters of the host spheroids in local galaxies. The work is based on two-dimensional bulge-disk decompositions of…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 E. Sani , A. Marconi , L. K. Hunt , G. Risaliti
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