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Related papers: MOND fiducial specific angular momentum of disc ga…

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The specific angular momenta ($j\equiv J/M$) of stars ($j_{\star}$), gas ($j_{\mathrm{gas}}$), baryons as a whole ($j_{\mathrm{b}}$) and dark matter haloes ($j_{\mathrm{h}}$) contain clues of vital importance about how galaxies form and…

Astrophysics of Galaxies · Physics 2023-05-03 Alessandro B. Romeo , Oscar Agertz , Florent Renaud

I derive a new MOND relation for pure-disc galaxies: The `dynamical' central surface density, $\Sigma^0_D$, deduced from the measured velocities, is a universal function of only the true, `baryonic' central surface density, $\Sigma^0_B$:…

Astrophysics of Galaxies · Physics 2016-09-28 Mordehai Milgrom

(Abridged) Specific angular momentum is one of the key parameters that control the evolution of galaxies. We derive the baryonic specific angular momentum of disc galaxies and study its relation with the dark matter specific angular…

Astrophysics of Galaxies · Physics 2021-07-14 Pavel E. Mancera Piña , Lorenzo Posti , Filippo Fraternali , Elizabeth A. K. Adams , Tom Oosterloo

By postulating that the majority of the mass and angular momentum of a disc galaxy is confined to the disc with a lognormal surface density distribution, and that galactic discs are substantially, if not fully, self-gravitating, it may be…

Astrophysics of Galaxies · Physics 2015-09-02 John Herbert Marr

The total specific angular momentum j of a galaxy disk is matched with that of its dark matter halo, but the distributions are different, in that there is a lack of both low- and high-j baryons with respect to the CDM predictions. I…

Astrophysics of Galaxies · Physics 2018-08-21 Sarah M. Sweet , Deanne B. Fisher , Karl Glazebrook , Danail Obreschkow , Claudia D. P. Lagos , Liang Wang

It is shown that the foundational axioms of MOND alone predict a strong correlation between a bulk measure of the baryonic surface density, $\Sigma_B$, and the corresponding dynamical one, $\Sigma_D$, of an isolated object, such as a…

Astrophysics of Galaxies · Physics 2024-06-07 Mordehai Milgrom

We introduce a new diagnostic for exploring the link between angular momentum and local gravitational instability in galaxy discs. Our diagnostic incorporates the latest developments in disc instability research, is fully consistent with…

Astrophysics of Galaxies · Physics 2018-08-07 Alessandro B. Romeo , Keoikantse Moses Mogotsi

The IllustrisTNG simulations reproduce the observed scaling relation between stellar specific angular momentum (sAM) $j_{\rm s}$ and mass $M_{\rm s}$ of central galaxies. We show that the local $j_{\rm s}$-$M_{\rm s}$ relation ${\rm log}\…

Astrophysics of Galaxies · Physics 2022-10-05 Min Du , Luis C. Ho , Hao-Ran Yu , Victor P. Debattista

The relations between the specific angular momenta ($j$) and masses ($M$) of galaxies are often used as a benchmark in analytic models and hydrodynamical simulations as they are considered to be amongst the most fundamental scaling…

We present a MUSE and KMOS dynamical study 405 star-forming galaxies at redshift z=0.28-1.65 (median redshift z=0.84). Our sample are representative of star-forming, main-sequence galaxies, with star-formation rates of SFR=0.1-30Mo/yr and…

Galaxy formation in the current cosmological paradigm is a very complex process in which inflows, outflows, interactions and mergers are common events. These processes can redistribute the angular momentum content of baryons. Recent…

Astrophysics of Galaxies · Physics 2015-08-31 Susana Pedrosa , Patricia Tissera

We combine constraints on the galaxy-dark matter connection with structural and dynamical scaling relations to investigate the angular momentum content of disc galaxies. For haloes with masses in the interval 10^{11.3} < M_vir/M_sun <…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Aaron A. Dutton , Frank C. van den Bosch

The specific angular momenta ($j_t$) of stars, baryons as a whole and dark matter haloes contain clues of vital importance about how galaxies form and evolve. Using a sample of 70 spiral galaxies, we perform a preliminary analysis of $j_t$,…

Astrophysics of Galaxies · Physics 2023-08-22 Lan Zhang , Feilu Wang , Xiangxiang Xue , David Salzmann , Baifei Shen , Zehao Zhong , Gang Zhao

We show that the stellar specific angular momentum j_*, mass M_*, and bulge fraction beta_* of normal galaxies of all morphological types are consistent with a simple model based on a linear superposition of independent disks and bulges. In…

Astrophysics of Galaxies · Physics 2018-12-12 S. Michael Fall , Aaron J. Romanowsky

We derive the specific baryonic angular momentum of five gas rich dwarf galaxies from HI kinematics complemented by stellar mass profiles. Since the gas mass of these galaxies is much larger than the stellar mass, the angular momentum can…

Astrophysics of Galaxies · Physics 2017-02-10 Aditya Chowdhury , Jayaram N. Chengalur

The stellar disk size of a galaxy depends on the ratio of the disk stellar mass to the halo mass, $m_\star \equiv M_\star/M_{\rm dh}$, and the fraction of the dark halo angular momentum transferred to the stellar disk, $j_\star \equiv…

Astrophysics of Galaxies · Physics 2018-02-21 Taku Okamura , Kazuhiro Shimasaku , Ryota Kawamata

This work present high-precision measurements of the specific baryon angular momentum jb, contained in stars, atomic gas, and molecular gas, out to ~10 scale radii, in 16 nearby spiral galaxies of the THINGS sample. The accuracy of these…

Astrophysics of Galaxies · Physics 2014-06-19 Danail Obreschkow , Karl Glazebrook

Galaxy groups, which have hardly been looked at in MOND, afford probing the acceleration discrepancies in regions of system-parameter space that are not accessible in well-studied galactic systems, such as galaxies, galaxy clusters, and…

Astrophysics of Galaxies · Physics 2018-12-04 Mordehai Milgrom

[Abridged] We study the angular-momentum profiles of a statistical sample of halos drawn from a high-resolution N-body simulation of the LCDM cosmology. We find that the cumulative mass distribution of specific angular momentum, j, in a…

We study the relationship between the H{\sc i} specific angular momentum (j$_{\rm g}$) and the H{\sc i} mass (M$_{\rm g}$) for a sample of galaxies with well measured H{\sc i} rotation curves. We find that the relation is well described by…

Astrophysics of Galaxies · Physics 2021-08-11 Sushma Kurapati , Jayaram N. Chengalur , Marc A. W. Verheijen
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