Results 51 to 60 of about 210,358 (255)
Simulations of High-redshift [O iii] Emitters: Chemical Evolution and Multiline Diagnostics
The Astrophysical Journal, 2023 Recent observations by the James Webb Space Telescope discovered a number of high-redshift galaxies with strong emission lines from doubly ionized oxygen.
Yurina Nakazato +2 more
doaj +1 more source
Constraints on 3.55 keV line emission from stacked observations of dwarf spheroidal galaxies [PDF]
, 2014 Several recent works have reported the detection of an unidentified x-ray line at 3.55 keV, which could possibly be attributed to the decay of dark matter (DM) particles in the halos of galaxy clusters and in the M31 galaxy.
D. Malyshev, A. Neronov, D. Eckert
semanticscholar +1 more source
The polarization of millimeter-wave emission lines in dense interstellar clouds
The Astrophysical Journal, 1983 Measurements of linear polarization are reported for thermally excited CO, /sup 13/CO, HCN, and CS in 14 dense clouds which encompass a broad range of physical conditions, gas dynamics, and possible magnetic field structure. Observing techniques are described which are sensitive to polarizations as small as 0.5%, and upper limits this small were ...
P. G. Wannier +2 more
openaire +1 more source
Protoplanetary disk masses from CO isotopologue line emission [PDF]
, 2014 Context. One of the methods for deriving disk masses relies on direct observations of the gas, whose bulk mass is in the outer cold regions (T. 30 K). This zone can be well traced by rotational lines of less abundant CO isotopologues such as 13 CO, C 18 ...
A. Miotello, S. Bruderer, E. Dishoeck
semanticscholar +1 more source
The Origins of [CII] Emission in Local Star-forming Galaxies [PDF]
, 2017 The [CII] 158um fine-structure line is the brightest emission line observed in local star-forming galaxies. As a major coolant of the gas-phase interstellar medium, [CII] balances the heating, including that due to far-ultraviolet photons, which heat the
Armus, Lee +19 more
core +3 more sources
A Curved 150 pc Long Jet in the Double-peaked Emission-line AGN KISSR 434 [PDF]
Astrophysical Journal, 2018 Double-peaked emission lines in the narrow- and/or broad-line spectra of active galactic nuclei (AGNs) have been suggested to arise as a result of disky broad/narrow-line regions, jet–medium interaction, or the presence of binary supermassive black holes.
P. Kharb +5 more
semanticscholar +1 more source
The Lyα Sky as Observed by New Horizons at 57 au
The Astronomical JournalDuring 2023 September the Alice ultraviolet spectrograph on the New Horizons (NH) spacecraft was used to map diffuse Lyα emission over most of the sky, at a range of ∼56.9 au from the Sun.
G. Randall Gladstone +24 more
doaj +1 more source
The Astrophysical Journal Supplement Series, 2023 High-resolution absorption, dispersed fluorescence emission, and photoionization cross sections are presented for gas-phase adamantane excited by synchrotron radiation in the exciting-photon energy range of 6–30 eV. Relative and absolute absorption cross
Lutz Marder +11 more
doaj +1 more source
Survey on AI‐Enabled Computer Vision Technologies and Applications for Space Robotic Missions
Journal of Field Robotics, EarlyView.ABSTRACT This survey provides a comprehensive overview of recent advancements and challenges in Artificial Intelligence (AI)‐enabled computer vision (CV) techniques for space robotic missions, spanning critical phases such as Entry, Descent, and Landing (EDL), orbital operations, and planetary surface exploration.
Maciej Quoos +6 more
wiley +1 more source
Mapping the interstellar medium in galaxies with Herschel/SPIRE [PDF]
, 2010 The standard method of mapping the interstellar medium in a galaxy, by observing the molecular gas in the CO 1-0 line and the atomic gas in the 21-cm line, is largely limited with current telescopes to galaxies in the nearby universe.
Bock, J. J. +4 more
core