A5088951883- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Scientific Research and Discoveries
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- History and Developments in Astronomy
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Geophysics and Gravity Measurements
- Adaptive optics and wavefront sensing
- Relativity and Gravitational Theory
- X-ray Spectroscopy and Fluorescence Analysis
- Particle Detector Development and Performance
- Advanced Thermodynamics and Statistical Mechanics
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- CCD and CMOS Imaging Sensors
- Impact of Light on Environment and Health
- Computational Physics and Python Applications
- Experimental and Theoretical Physics Studies
- Solar and Space Plasma Dynamics
Scuola Internazionale Superiore di Studi Avanzati
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2014-2024
Institute for Fundamental Physics of the Universe
2019-2024
University of Trieste
2012-2021
Lomonosov Moscow State University
2021
Campbell Collaboration
2017-2019
Trieste Astronomical Observatory
2018
Istituto Nazionale di Fisica Nucleare
2017
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2013
Space Telescope Science Institute
1993
Abstract We use a homogeneous sample of about 1100 optical and radio rotation curves (RCs) relative surface photometry to investigate the main mass structure properties spirals, over range 6 mag out ≾ 1.5 2 radii (for data, respectively). confirm strong dependence on luminosity for both profile amplitude RCs claimed by Persic & Salucci. Spiral show striking feature that single global parameter, e.g. luminosity, dictates rotational velocity at any radius object, so revealing existence...
We present, for five spiral galaxies, H i data which, along with the Ha rotation curves, are used to derive distribution of dark matter within these objects. A new method extracting curves from cubes is presented, which takes into account existence a warp and minimizes projection effects. The obtained tested by taking them as input in construction model that compared observed ones: agreement excellent. Model built using standard methods, such first-moment analysis, however, fail test. agree...
We confirm and extend the recent finding that central surface density r_0*rho_0 galaxy dark matter halos, where r_0 rho_0 are halo core radius density, is nearly constant independent of luminosity. Based on co-added rotation curves about 1000 spiral galaxies, mass models individual dwarf irregular galaxies late early types with high-quality and, galaxy-galaxy weak lensing signals from a sample elliptical we find log(r_0*rho_0) = 2.15 +- 0.2, in units log(Msol/pc^2). also show observed...
Aims. We derive the value of dark matter density at Sun's location (ρ⊙) without fully modeling mass distribution in Galaxy.
We derive the mass model of Milky Way (MW), crucial for Dark Matter (DM) direct and indirect detection, using recent data a cored dark matter halo profile, which is favoured by studies external galaxies. The method used consists in fitting spherically symmetric Galaxy with Burkert DM profile to available data: MW terminal velocities region inside solar circle, circular velocity as recently estimated from maser star forming regions at intermediate radii, dispersions stellar tracers outermost...
We investigate the structure of dark matter halos by means kinematics a very large sample spiral galaxies all luminosities. The observed rotation curves show universal profile which is sum an exponential thin disk term and spherical halo with flat density core. find that Burkert proposed to describe distribution dwarf also provides excellent mass model for around systems up 100 times more massive. Moreover, we core densities ρ0 radii r0 lie in same scaling relation = 4.5 × 10-2(r0/kpc)-2/3...
We use high-quality optical rotation curves of 9 low-luminosity disk galaxies to obtain the velocity profile surrounding dark matter halos. find that they increase linearly with radius at least out stellar edge, implying that, over entire region where stars reside, density halo is constant. The properties mass structure found are similar claimed for a number dwarf and low surface brightness galaxies, but provide more substantial evidence discrepancy between distribution predicted in standard...
In the current ΛCDM cosmological scenario, N-body simulations provide us with a universal mass profile, and consequently equilibrium circular velocity of virialized objects, as galaxies. this paper we obtain, by combining kinematical data their inner regions global observational properties, rotation curve disc galaxies corresponding distribution out to virial radius. This extends results Paper I, concerning luminous Sb–Im spirals, edge galaxy haloes.
We have performed a detailed analysis of the local super-massive black-hole (SMBH) mass function based on both kinematic and photometric data derived an accurate analytical fit in range 10^6 <= (M_BH/M_sun) 5*10^9. find total SMBH density (4.2+/-1.1)*10^5 M_sun/Mpc^3, about 25% which is contributed by SMBHs residing bulges late type galaxies. Exploiting up-to-date luminosity functions hard X-ray optically selected AGNs, we studied accretion history population. If most happens at constant...
We present new relationships between halo masses M_h and several galaxy properties, including r*-band luminosities L_r, stellar (M_star) baryonic masses, velocity dispersions (sigma), black hole (M_BH). Approximate analytic expressions are given. In the mass range 3*10^(10) M_sun <= 3*10^(13) M_h-L_r, M_star-M_h, M_BH-M_h well represented by a double power law, with break at M_h_break~3*10^(11) M_sun, corresponding to in stars M_star~ 1.2*10^(10) luminosity L_r~ 5*10^9 L_sun, dispersion...
The large discrepancy between the amount of baryons that were synthesized in Big-Bang and we detect at $z=0$ locked stars inside galaxies hot/cold gas galaxies. goup clusters, is a well known crucial issue for present day cosmology. It also thought this riddle backbone how ordinary matter has formed, dark potential wells, structures see today. Then, it useful to reprint, by means archive, first (pre- astro-ph era) published work which "luminous" was actually suitably computed disagreement...
We present the 21-cm rotation curve of nearby galaxy M33 out to a galactocentric distance 16 kpc (13 disc scalelengths). The keeps rising last measured point and implies dark halo mass ≳5×1010 M⊙. stellar gaseous discs provide virtually equal contributions gravitational potential at large radii, but no obvious correlation is found between radial distribution matter stars or gas. Results best fit in picture which controls from 3 outward, with density decreases radially as R−1.3. profile...
We present new HI observations of the nearby dwarf galaxy NGC 3741. This has an extremely extended disk, which allows us to trace rotation curve out unprecedented distances in terms optical disk: we reach 42 B-band exponential scale lengths or about 7 kpc. The disk is strongly warped, but warp very symmetric. distribution and kinematics are accurately derived by building model data cubes, closely reproduce observations. In order account for observed features cube, radial motions 5-13 km/s...
We present an analysis of a devised sample rotation curves (RCs), with the aim checking consequences modified f(R) gravity on galactic scales. Originally motivated by mystery dark energy, this theory may explain observed non‐Keplerian profiles RCs in terms breakdown Einstein general relativity. show that, general, power‐law version could fit observations well, reasonable values for mass model parameters. This encourage further investigation into Rn from both observational and theoretical points view.
Kinematic surveys of the dwarf spheroidal (dSph) satellites Milky Way are revealing tantalizing hints about structure dark matter (DM) haloes at low-mass end galaxy luminosity function. At bright end, modelling spiral galaxies has shown that their rotation curves consistent with hypothesis a universal curve whose shape is supported by cored halo. In this paper, we investigate whether internal kinematics dSphs particular DM distributions which reproduce properties galaxies. Although densities...
We use the concept of spiral rotation curves universality to investigate luminous and dark matter properties dwarf disc galaxies in local volume (size $\sim11$ Mpc). Our sample includes 36 objects with carefully selected from literature. find that, despite large variations our luminosities ($\sim$ 2 dex), specifically normalized units, look all alike lead lower-mass version universal curve found Persic et al. mass model double $V(R/R_{opt})/V_{opt}$ galaxies: results show that these systems...
Under the assumption that accretion on to massive black holes (BHs) powers active galactic nuclei (AGNs), mass function (MF) of BHs responsible for their past activity is estimated. For this, we take into account not only related optically selected AGNs, but also required produce hard X-ray background (HXRB). The MF dark objects (MDOs) in nearby quiescent galaxies computed by means most recent results demography. two functions match well under concentrated a single significant burst with...
Direct and indirect observational evidence leads to the conclusion that high redshift QSOs did shine in core of early type proto-galaxies during their main episode star formation. Exploting this fact, we derive rate formation kind stellar systems at by using QSO Luminosity Function. The elemental proportions elliptical galaxies, descendents hosts, suggest was more rapid massive objects. We show is expected occur Dark Matter haloes, when processes cooling heating considered. This also...
We present an analysis of high-resolution H I data the dwarf galaxy DDO 47, aimed at testing hypothesis that dark halo triaxiality might induce noncircular motions resulting in rotation curves best fitted by cored halos, even if matter is intrinsically cuspy. This could be invoked order to reconcile predictions standard ΛCDM theory with disk galaxies. 47 ideal case test this because it has a very regular velocity field, its curve halo, and NFW inconsistent data. analyze field through higher...
view Abstract Citations (184) References (39) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Universal Galaxy Rotation Curve Persic, Massimo ; Salucci, Paolo Analyzing an extended set of selected galaxy rotation curves (with - 17.5 >= M_B_> -23.2), we find that for a given luminosity the spiral galaxies within optical radius are universal function, Publication: Astrophysical Journal Pub Date: February 1991 DOI: 10.1086/169670 Bibcode: 1991ApJ...368...60P...
We propose that angular momentum transfer from the baryons to dark matter (DM) during early stages of galaxy formation can flatten halo inner density profile and modify dynamics. compute phase-space distribution function DM halos corresponds anisotropy profiles obtained N-body simulations in concordance cosmology. then describe an injection into by modifying show system evolves a new equilibrium configuration; latter features constant central tangentially dominated regions, while structure...
We combine Planck High Frequency Instrument data at 857, 545, 353 and 217 GHz with from Wide-field Infrared Survey Explorer (WISE), Spitzer, IRAS Herschel to investigate the properties of a well-defined, flux-limited sample local star-forming galaxies. A 545 flux density limit was chosen so that is 80 per cent complete this frequency, resulting contains total 234 local, dust emission star formation via various models calculate mass function. Although single-component-modified blackbodies fit...
The Thomas-Fermi approach to galaxy structure determines selfconsistently the fermionic warm dark matter (WDM) gravitational potential given distribution function f(E). This framework is appropriate for macroscopic quantum systems: neutron stars, white dwarfs and WDM galaxies. Compact dwarf galaxies follow from degenerate regime, while dilute large classical Boltzmann regime. We find analytic scaling relations main magnitudes as halo radius r_h, mass M_h phase space density. observational...