Results 21 to 30 of about 110,517 (296)

Stellar initial mass function over a range of redshifts [PDF]

Astronomische Nachrichten, 2021
The stellar Initial Mass Function (IMF) seems to be close to universal in the local star‐forming regions. However, this quantity of a newborn stellar population responds differently at gas metallicities Z ∼ Z⊙ than Z = 0. A view on the cosmic star formation history suggests that the cooling agents in the gas vary both in their types and molecular ...
Riaz, Rafeel, Schleicher, Dominik R. G., Vanaverbeke, Siegfried, Klessen, Ralf S.   +3 more
openaire   +2 more sources

Quantifying the Universality of the Stellar Initial Mass Function in Old Star Clusters [PDF]

, 2012
We present a new technique to quantify cluster-to-cluster variations in the observed present-day stellar mass functions of a large sample of star clusters.
Alison Sills, Anderson, Ata Sarajedini, Baumgardt, Baumgardt, Bonnell, Casetti-Dinescu, Chatterjee, Chernoff, Christian Knigge, Cool, Da Costa, Davis, De Angeli, De Marchi, De Marchi, Dinescu, Dotter, Dotter, Elmegreen, Elmegreen, Evert Glebbeek, Fregeau, Fregeau, Fregeau, Gieles, Goldsbury, Grenier, Guido de Marchi, Harris, Heggie, Heggie, Heggie, Henon, Henon, Hurley, Hut, Hut, Joshi, Joshi, Knigge, Kroupa, Kruijssen, Lada, Lada, Lada, Lada, Leigh, Lejeune, Lejeune, Marin-Franch, Marks, Marks, McKee, Milone, Milone, Murray, Nathan Leigh, Parravano, Paust, Pols, Portegies Zwart, Portegies Zwart, Rubenstein, Sarajedini, Scalo, Sollima, Spitzer, Stefan Umbreit, Tutukov, Vesperini, von Hippel, Zonoozi   +72 more
core   +3 more sources

Low-surface-brightness Galaxies are Missing in the Observed Stellar Mass Function

The Astrophysical Journal, 2023
We investigate the impact of the surface-brightness (SB) limit on the galaxy stellar mass functions (GSMFs) using galaxy catalogs generated from the Horizon Run 5 ( HR5 ) simulation.
Juhan Kim, Jaehyun Lee, Clotilde Laigle, Yohan Dubois, Yonghwi Kim, Changbom Park, Christophe Pichon, Brad K. Gibson, C. Gareth Few, Jihye Shin, Owain Snaith   +10 more
doaj   +1 more source

The stellar mass assembly of galaxies from z=0 to z=4. Analysis of a sample selected in the rest-frame near-infrared with Spitzer [PDF]

, 2008
Using a sample of ~28,000 sources selected at 3.6-4.5 microns with Spitzer observations of the HDF-N, the CDF-S, and the Lockman Hole (surveyed area: ~664 arcmin^2), we study the evolution of the stellar mass content of the Universe at ...
Armando Gil de Paz, Bolzonella M., Bower R. G., Brocklehurst M., Efstathiou G., Eiichi Egami, Fioc M., George H. Rieke, Guillermo Barro, Jaime Zamorano, Jennifer L. Donley, Jesús Gallego, Kauffmann G., Kroupa P., Lehmann I., Madau P., Myra Blaylock, Nagashima M., Pablo G. Pérez‐González, Padoan P., Sergio Pascual, Victor Villar   +21 more
core   +3 more sources

Microlensing and the Stellar Mass Function [PDF]

Publications of the Astronomical Society of the Pacific, 1996
Traditional approaches to measuring the stellar mass function (MF) are fundamentally limited because objects are detected based on their luminosity, not their mass. These methods are thereby restricted to luminous and relatively nearby stellar populations. Gravitational microlensing promises to revolutionize our understanding of the MF.
openaire   +2 more sources

Effect of electric charge on conformal compact stars

European Physical Journal C: Particles and Fields, 2019
We investigate the effect of electric charge in anisotropic compact stars with conformal symmetry. We assume that the pressure and the density of the matter inside the stellar structure are large with strong gravitational fields.
P. Mafa Takisa, S. D. Maharaj, L. L. Leeuw   +2 more
doaj   +1 more source

Measuring the stellar initial mass function [PDF]

Proceedings of the International Astronomical Union, 2019
AbstractThe birth of stars and the formation of galaxies are cornerstones of modern astrophysics. While much is known about how galaxies globally and their stars individually form and evolve, one fundamental property that affects both remains elusive.
openaire   +1 more source

The stellar initial mass function at 0.9

Astrophysical Journal Letters, 2014
We explore the stellar initial mass function (IMF) of a sample of 49 massive quiescent galaxies (MQGs) at 0.9$
Martín-Navarro, Ignacio, Pérez-González, Pablo G., Trujillo, Ignacio, Esquej, Pilar, Vazdekis, Alexandre, Domínguez Sánchez, Helena, Barro, Guillermo, Bruzual, Gustavo, Charlot, Stéphane, Cava, Antonio, Ferreras, Ignacio, Espino, Néstor, La Barbera, Francesco, Koekemoer, Anton M., Cenarro, A. Javier   +14 more
openaire   +4 more sources

An empirical prediction for stellar metallicity distributions in nearby galaxies

, 2012
We combine star-formation histories derived from observations of high redshift galaxies with measurements of the z~0 relation between gas-phase metallicity, stellar mass, and star formation rate to make an explicit and completely empirical connection ...
Allende Prieto, Arrigoni, Asplund, Behroozi, Bensby, Bland-Hawthorn, Bouché, Brinchmann, Brooks, Brooks, Bruzual, Chabrier, Colavitti, Conroy, Daddi, Davé, Davé, Dayal, De Lucia, De Lucia, Delahaye, Dolphin, Eisenstein, Elbaz, Ellison, Ellison, Erb, Finlator, Fontanot, Gallazzi, Gallazzi, Garnett, Hirschmann, Hughes, Ivezić, Karim, Kewley, Kewley, Kimm, Kirby, Kirby, Kirby, Klypin, Kobayashi, Kobulnicky, Kormendy, Lara-López, Leitner, Leitner, Lopez-Sanchez, Lynden-Bell, Maiolino, Mannucci, Mannucci, Molly S. Peeples, Moster, Mouhcine, Nagashima, Nicholls, Noeske, Oliver, Oppenheimer, Pagel, Pasquali, Pasquali, Peeples, Rachel S. Somerville, Robaina, Salim, Savaglio, Scannapieco, Shapley, Skelton, Somerville, Sommariva, Spitoni, Thomas, Tinsley, Tinsley, Tissera, Toomre, Trager, Tremonti, Tumlinson, Weisz, Wiersma, Woo, Yabe, Yates, Zahid, Zahid, Zaritsky, Zheng   +92 more
core   +1 more source

Measurement of the Angular Momenta of Pre-main-sequence Stars: Early Evolution of Slow and Fast Rotators and Empirical Constraints on Spin-down Torque Mechanisms

The Astronomical Journal, 2023
We use TESS full-frame imaging data to investigate the angular momentum evolution of young stars in the Orion Complex. We confirm recent findings that stars with rotation periods faster than 2 days are overwhelmingly binaries, with typical separations of
Marina Kounkel, Keivan G. Stassun, Lynne A. Hillenbrand, Jesús Hernández, Javier Serna, Jason Lee Curtis   +5 more
doaj   +1 more source