Results 81 to 90 of about 7,914 (245)
The Astrophysical JournalThe physics of recombination lines in the He i singlet system is expected to be relatively simple, supported by accurate atomic models. We examine the intensities of He i singlets λ 3614, λ 3965, λ 5016, λ 6678, and λ 7281 and the triplet He i λ 5876
J. E. Méndez-Delgado +13 more
doaj +1 more source
Abundance gradients in elliptical galaxies [PDF]
Astronomy & Astrophysics, 2003 Abundance gradients predicted by dissipative models of galaxy formation are studied with the aid of mass models of spherical galaxies obeying the Sersic R 1=n law in projection. The link between metallicity and stellar binding energies and angular momenta is derived from the "concentration model" by Lynden-Bell (1975) with the addition of a terminal ...
L. Angeletti, P. Giannone
openaire +1 more source
Simulations All the Way Up! An Atheist's Response to the Fine‐Tuning Argument
Analytic Philosophy, EarlyView.ABSTRACT So the Fine‐tuning Argument goes, because it is so unlikely for the physical constants of the laws of nature to have taken the values that they in fact take, we should significantly raise our credence that God exists. Simulation Arguments argue that our world might be (or, in stronger versions, that it probably is) a mere computer simulation ...
Nikk Effingham
wiley +1 more source
Chemical analysis of the Milky Way’s nuclear star cluster
Astronomy & AstrophysicsContext. The Milky Way nuclear star cluster (MWNSC) is located in the Galactic centre, together with the Milky Way nuclear stellar disc (MWNSD), and they dominate the gravitational potential within the inner 300 pc.
Schultheis M. +8 more
doaj +1 more source
Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight
Experimental Physiology, EarlyView.Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley +1 more source
The Gas-phase Mass–Metallicity Relation for Massive Galaxies at z ∼ 0.7 with the LEGA-C Survey
The Astrophysical JournalThe massive end of the gas-phase mass–metallicity relation (MZR) is a sensitive probe of active galactic nuclei (AGN) feedback that is a crucial but highly uncertain component of galaxy evolution models.
Zach J. Lewis +14 more
doaj +1 more source
Advances in cardiac devices and bioelectronics augmented with artificial intelligence
The Journal of Physiology, EarlyView.Abstract figure legend Interfaces between the human heart, diagnostic bioelectronics, artificial intelligence, and clinical care. From left to right: Human heart and biosensor interface; representative waveforms of common diagnostic bioelectronic sensing modalities.
Charles Stark +3 more
wiley +1 more source
Simulating molecular cloud regulated star formation in Galaxies [PDF]
, 2007 This thesis is primarily concerned with understanding the process of galaxy formation via the simulation of the interstellar medium, star formation and supernova feedback.
Booth, Craig Martin
core
Metal abundances of galaxies stellar populations: estimates and implications for galaxy evolution
, 2019 The metal abundances of galaxy stellar populations are the result of the interplay between star formation, gas recycling and galaxy environment interactions.
Gallazzi, Anna Rita +1 more
core +1 more source
Milky Way’s Metal-poor Stars Display Chemical Transition near the Solar Radius
The Astrophysical Journal LettersThe metal-poor stars of a galaxy offer insights into that galaxy’s early formation processes and accretion history. Here, we investigate whether the metal-poor stars of our Milky Way Galaxy exhibit any characteristic trends in Galactocentric distance ...
Khyati Malhan
doaj +1 more source