Results 61 to 70 of about 657,244 (303)
Interstellar dust within the life cycle of the interstellar medium
EPJ Web of Conferences, 2012 Cosmic dust is omnipresent in the Universe. Its presence influences the evolution of the astronomical objects which in turn modify its physical and chemical properties.
Demyk K.
doaj +1 more source
Recent Results of Solid-State Spectroscopy [PDF]
, 2011 Solid state spectroscopy continues to be an important source of information on the mineralogical composition and physical properties of dust grains both in space and on planetary surfaces.
Akemi Tamanai +21 more
core +1 more source
Cosmic dust in the stratosphere [PDF]
Journal of Geophysical Research, 1968 Cosmic dust in one to 100 micron size range in stratosphere, noting balloon-borne collecting technique and upper limit on total terrestrial accretion ...
David W. Parkin +2 more
openaire +2 more sources
Can inhomogeneties accelerate the cosmic volume expansion? [PDF]
, 2006 If expanding and contracting regions coexist in the universe, the speed of the cosmic volume expansion can be accelerated. We construct simple inhomogeneous dust-filled universe models in which the speed of the cosmic volume expansion is accelerated for ...
Kai, Tomohiro +4 more
core +2 more sources
Gas and Dust Temperature in Prestellar Cores Revisited: New Limits on Cosmic-Ray Ionization Rate [PDF]
Astrophysical Journal, 2019 We develop a self-consistent model for the equilibrium gas temperature and size-dependent dust temperature in cold, dense, prestellar cores, assuming an arbitrary power-law size distribution of dust grains.
A. Ivlev +3 more
semanticscholar +1 more source
Considering light-matter interactions in Friedmann equations based on the conformal FLRW metric
Journal of Advanced Research, 2023 Introduction: Recent observations indicate that the Universe is not transparent but partially opaque due to absorption of light by ambient cosmic dust. This implies that the current cosmological model valid for the transparent universe must be modified ...
Václav Vavryčuk
doaj
Missing Giants: Predictions on Dust-obscured Galaxy Stellar Mass Assembly Throughout Cosmic Time
The Astrophysical Journal, 2023 Due to their extremely dust-obscured nature, much uncertainty still exists surrounding the stellar mass growth and content in dusty, star-forming galaxies (DSFGs) at z > 1. In this work, we present a numerical model built using empirical data on DSFGs to
Arianna S. Long +7 more
doaj +1 more source
Note on strong cosmic censorship for spherically symmetric Einstein-dust model [PDF]
arXiv, 2021 In this note, we derive an ordinary differential equation for outgoing light rays in the spacetime of a spherically symmetric contracting dust cloud. The violation of strong cosmic censorship is equivalent to the existence of a solution blowing up at the centre of the symmetry.
arxiv
Dust versus Cosmic Acceleration [PDF]
The Astrophysical Journal, 1999 Two groups have recently discovered a statistically significant deviation in the fluxes of high-redshift type Ia supernovae from the predictions of a Friedmann model with zero cosmological constant. In this Letter, I argue that bright, dusty, starburst galaxies would preferentially eject a dust component with a shallower opacity curve (hence less ...
openaire +4 more sources
Modelling dust processing and the evolution of grain sizes in the ISM using the method of moments [PDF]
, 2016 Interstellar dust grains do not have a single well-defined origin. Stars are demonstrably dust producers, but also efficient destroyers of cosmic dust. Dust destruction in the ISM is believed to be the result of SN shocks hitting the ambient ISM gas (and dust) and lead to an increased rate of ion sputtering, which reduces the dust mass.
arxiv +1 more source