Results 21 to 30 of about 2,874 (264)
THE LOW-MASS STELLAR POPULATION IN L1641: EVIDENCE FOR ENVIRONMENTAL DEPENDENCE OF THE STELLAR INITIAL MASS FUNCTION [PDF]
The Astrophysical Journal, 2012 We present results from an optical photometric and spectroscopic survey of the young stellar population in L1641, the low-density star-forming region of the Orion A cloud south of the Orion Nebula Cluster (ONC). Our goal is to determine whether L1641 has a large enough low-mass population to make the known lack of high-mass stars a statistically ...
Hsu, Wen-Hsin +7 more
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The stellar initial mass function [PDF]
Proceedings of the International Astronomical Union, 2006 Abstract The IMF UNIVERSALITY HYPOTHESIS cannot be discarded despite the existence of the CLUSTER IMF THEOREM. This means that the currently existing star-formation theory fails to describe the stellar outcome. The IGIMF THEOREM, however, predicts a variation of galaxy-wide IMFs in dependence of the galaxy's star-formation rate even if the IMF ...
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The Luminosity Functions and Stellar Masses of Galactic Disks and Spheroids [PDF]
The Astrophysical Journal, 2002 We present a method to obtain quantitative measures of galaxy morphology and apply it to a spectroscopic sample of field galaxies in order to determine the luminosity and stellar mass functions of galactic disks and spheroids. We estimate, for each galaxy, the bulge-to-disk luminosity ratio in the I-band using a two-dimensional image fitting procedure.
Benson, A.J. +2 more
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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.
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Covariances of galaxy stellar mass functions and correlation functions [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Submitted to MNRAS.
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The characteristic stellar mass as a function of redshift [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 We present a model for the star formation process during the initial collapse of dark matter haloes at redshifts z=0-30. We derive a simple expression for the characteristic stellar mass scale during this initial burst of star formation. In our picture, this characteristic scale reflects both the minimum temperature to which the gas can cool ...
Clarke, Cathie J., Bromm, Volker
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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 +14 more
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On the function describing the stellar initial mass function [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 We propose a functional form for the IMF, the L_3 IMF, which is a natural heavy-tailed approximation to the log-normal distribution. It is composed of a low-mass power law and a high mass power-law which are smoothly joined together. Three parameters are needed to achieve this.
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The stellar ‘Snake’ – II. The mass function
Monthly Notices of the Royal Astronomical SocietyABSTRACT We present a comprehensive investigation on the mass function (MF) of a snake-like stellar structure in the solar neighbourhood, building on our previous discovery. To ensure the reliability of the data, we reselect the member stars of the Stellar ‘Snake’ in the latest Gaia Data Release 3 using the same approach as the initial ...
Xiang-Ming Yang +10 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source