xGASS: H i Fueling of Star Formation in Disk-dominated Galaxies
نویسندگان
چکیده
منابع مشابه
Star Formation in Isolated Disk Galaxies. I. Models and Star Formation Characteristics
We model star formation in a wide range of isolated disk galaxies composed of a dark matter halo and a disk of stars and isothermal gas, using a threedimensional smoothed particle hydrodynamics code. Absorbing sink particles are used to directly measure the mass of gravitationally collapsing gas. They reach masses characteristic of stellar clusters. In this paper, we describe our galaxy models ...
متن کاملA Test of Star Formation Laws in Disk Galaxies
We use observations of the radial profiles of the mass surface density of total, Σg, and molecular, ΣH2, gas, rotation velocity and star formation rate surface density, Σsfr, of the molecular dominated regions of 12 disk galaxies from Leroy et al. to test several star formation laws: a “Kennicutt power law”, Σsfr = AgΣ 1.5 g,2; a “Constant molecular law”, Σsfr = AH2ΣH2,2; the “Turbulence-regula...
متن کاملThe star formation law in disk galaxies: a Bayesian view
The dependence of the star formation rate Ψ ∝ g/r on gas surface density g and galactocentric radius r are studied in disk galaxies. The sample includes the Milky Way galaxy and 11 nearby Sb and Sc galaxies with known radial gas surface densities and Hα surface brightnesses, used as a measure of the SFR. The Bayesian approach permits to compute genuine probabilities for the validity of several ...
متن کاملGravitational instability and star formation in disk galaxies
We present a general star formation law where star formation rate depends upon efficiency α, timescale τ of star formation, gas component σg of surface mass density and a real exponent n. A given exponent n determines τ which however yields the corresponding star formation rate. Current nominal Schmidt exponent ns for our model is 2 < ns < 3. Based on a gravitational instability parameter QA an...
متن کاملStar Formation Modes in Low - Mass Disk Galaxies
Low-mass disk galaxies with well-organized structures are relatively common in low density regions of the nearby Universe. They display a wide range in levels of star formation activity, extending from sluggishly evolving 'superthin' disk systems to nearby starbursts. Investigations of this class of galaxy therefore provides opportunities to test and define models of galactic star formation pro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2020
ISSN: 1538-4357
DOI: 10.3847/1538-4357/ab68dd