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Observations indicate that the disc population in galaxy clusters has undergone rapid evolution, transitioning from a dominance of blue spirals to red S0s over the past $\sim7$ Gyr. We build a simplified cluster evolutionary model in the…

Astrophysics of Galaxies · Physics 2026-03-25 A. Marasco , B. M. Poggianti , B. Vulcani , A. Moretti , M. Gullieuszik , J. Fritz

Ogle et al. have fallaciously argued recently that fast-rotating disc galaxies break with the predictions of MOND: the 6 fastest rotators of the 23 galaxies in their sample appear to have higher rotational speeds than is consistent with the…

Astrophysics of Galaxies · Physics 2020-02-25 Mordehai Milgrom

We present MOND analysis for several of the lowest mass disc galaxies currently amenable to such analysis--with (baryonic) masses below 4x10^8 solar masses. The agreement is good, extending the validity of MOND and its predicted mass…

Astrophysics · Physics 2009-11-11 Mordehai Milgrom , Robert H. Sanders

We investigate the relevance of kinematically identified bulges, discs and their role relative to galaxy quenching. We utilize an analysis of the SDSS-MaNGA survey conducted with the GPU-based code BANG which simultaneously models galaxy…

With a sample of 48,161 K giant stars selected from the LAMOST DR 2 catalogue, we construct torus models in a large volume extending, for the first time, from the solar vicinity to a Galactocentric distance of $\sim 20$ kpc, reaching the…

Astrophysics of Galaxies · Physics 2017-07-26 Qiao Wang , Yougang Wang , Chao Liu , Shude Mao , R. J. Long

The Universe is pervaded by magnetic fields in different scales, although for simplicity, they are ignored in most cosmological simulations. In this paper, we use the TNG50, which is a large cosmological galaxy formation simulation that…

Astrophysics of Galaxies · Physics 2023-07-28 Mohammad Hosseinirad , Fatemeh Tabatabaei , Mojtaba Raouf , Mahmood Roshan

We present the results of a series of numerical simulations aimed to study the evolution of a disc galaxy within the global tidal field of a group environment. Both the disc galaxy and the group are modelled as multi-component,…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Álvaro Villalobos , Gabriella De Lucia , Stefano Borgani , Giuseppe Murante

We revisit the application of Modified Newtonian Dynamics (MOND) to galaxy clusters. We confront the high quality X-ray data for eight clusters of galaxies observed by the \xmm satellite with the predictions of MOND. We obtain a ratio of…

Astrophysics · Physics 2009-11-11 Etienne Pointecouteau , Joseph Silk

A sample of edge-on spiral galaxies aimed at a study of the main structural and photometric parameters of edge-on galaxies both of early and late types is presented. The data were taken from the 2MASS in the J, H and K_s filters. The sample…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 A. V. Mosenkov , N. Ya. Sotnikova , V. P. Reshetnikov

In earlier papers in this series we determined the intrinsic stellar disc kinematics of fifteen intermediate to late type edge-on spiral galaxies using a dynamical modeling technique. From the photometry we find that intrinsically more…

Astrophysics · Physics 2009-11-10 M. Kregel , P. C. van der Kruit , K. C. Freeman

In this first paper in a series we present a study of the global dust emission distribution in nearby edge-on spiral galaxies. Our sample consists of 16 angularly large and 13 less spatially resolved galaxies selected from the DustPedia…

The data obtained by the recent modern sky surveys enable detailed studies of the stellar distribution in the multi-dimensional space spanned by spatial coordinates, velocity and metallicity, from the solar neighborhood all the way out to…

Astrophysics · Physics 2009-11-13 S. Loebman , R. Roskar , Z. Ivezic

Recent studies have made the community aware of scattered light when examining low-surface-brightness galaxy features such as thick discs. In our past studies of the thick discs of edge-on galaxies in the Spitzer Survey of Stellar Structure…

Astrophysics of Galaxies · Physics 2020-09-14 Sébastien Comerón , Heikki Salo , Johan H. Knapen

We compare properties of classical and pseudo-bulges and properties of their hosting galaxies selected from the MaNGA survey. Bulge types are identified based on the S$\mathrm{\acute{e}}$rsic index n of bulge component and the position of…

Astrophysics of Galaxies · Physics 2024-07-08 Jia Hu , Lan Wang , Junqiang Ge , Kai Zhu , Guangquan Zeng

We present an analytical model to identify thin discs in galaxies, and apply this model to a sample of SDSS MaNGA galaxies. This model fits the velocity and velocity dispersion fields of galaxies with regular kinematics. By introducing two…

Astrophysics of Galaxies · Physics 2021-04-19 Meng Yang , Anne-Marie Weijmans , Matthew A. Bershady , Michael Merrifield , Nicholas F. Boardman , Niv Drory

We investigate the relation between the projected morphology (b/a) and the velocity dispersion (sigma_v) of groups of galaxies using two recently compiled group catalogs, one based on the 2MASS redshift survey and the other on the SDSS Data…

Cosmology and Nongalactic Astrophysics · Physics 2011-02-11 H. Tovmassian , M. Plionis

We present a new and simple method to measure the instantaneous mass and radial growth rates of the stellar discs of spiral galaxies, based on their star formation rate surface density (SFRD) profiles. Under the hypothesis that discs are…

Astrophysics of Galaxies · Physics 2015-05-15 Gabriele Pezzulli , Filippo Fraternali , Samuel Boissier , Juan Carlos Muñoz-Mateos

Disc dominated galaxies can be difficult to accommodate in a hierarchical formation scenario like $\Lambda$CDM, where mergers are an important growth mechanism. However, observational evidence indicates that these galaxies are common. We…

Astrophysics of Galaxies · Physics 2025-03-26 Silvio Rodriguez , Valeria A. Cristiani , Laura V. Sales , Mario G. Abadi

We present the KMOS Galaxy Evolution Survey (KGES), a $K$-band Multi-Object Spectrograph (KMOS) study of the H$\alpha$ and [NII] emission from 288 $K$ band-selected galaxies at $1.2 \lesssim z \lesssim 1.8$, with stellar masses in the range…

Large mm surveys of star forming regions enable the study of entire populations of planet-forming disks and reveal correlations between their observable properties. Population studies of disks have shown that the correlation between disk…

Earth and Planetary Astrophysics · Physics 2024-08-07 Luca Delussu , Tilman Birnstiel , Anna Miotello , Paola Pinilla , Giovanni Rosotti , Sean M. Andrews