Results 11 to 20 of about 5,095,486 (206)
The interstellar medium of dwarf galaxies: new insights from Machine Learning analysis of emission-line spectra [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Dwarf galaxies are ideal laboratories to study the physics of the interstellar medium (ISM). Emission lines have been widely used to this aim. Retrieving the full information encoded in the spectra is therefore essential. This can be efficiently and reliably done using Machine Learning (ML) algorithms.
Ucci, G +8 more
openaire +8 more sources
Technology requirements of exploration beyond Neptune by solar sail propulsion [PDF]
, 2010 This paper provides a set of requirements for the technology development of a solar sail propelled Interstellar Heliopause Probe mission. The mission is placed in the context of other outer solar systems missions, ranging from a Kuiper Belt mission ...
Hughes, G.W. +2 more
core +4 more sources
High resolution studies of early type emission line stars [PDF]
, 2010 This thesis presents a study of early type, emission line objects on small angular scales. Spectroastrometry is used to separate the spectra of unresolved Herbig Ae/Be binary systems.
Wheelwright, Hugh Eric
core +6 more sources
The Wardle Instability in Interstellar Shocks. II. Gas Temperature and Line Emission [PDF]
The Astrophysical Journal, 1997 16 pages, 6 Postscript figures, LaTeX, accepted by Ap ...
Neufeld, David A., Stone, James M.
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Diagnosing the interstellar medium of galaxies with far-infrared emission lines [PDF]
Astronomy & Astrophysics, 2021 Context. Atomic fine structure lines have been detected in the local Universe and at high redshifts over the past decades. The [C II] emission line at 158 μm is an important observable as it provides constraints on the interstellar medium (ISM) cooling processes. Aims.
A. F. Ramos Padilla +4 more
openaire +3 more sources
Modelling and observations of molecules in discs around young stars [PDF]
, 2013 This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core +6 more sources
The Astrophysical Journal Supplement Series, 2023 Deuterium (D) was exclusively generated in the Big Bang, and the standard Big Bang nucleosynthesis (BBN) model predicts a primordial abundance of D/H ≈ 26 parts per million (ppm). As the Galaxy evolves, D/H gradually decreases because of astration.
X. J. Yang, Aigen Li
doaj +1 more source
Turbulence in the interstellar medium [PDF]
, 2014 Turbulence is ubiquitous in the insterstellar medium and plays a major role in several processes such as the formation of dense structures and stars, the stability of molecular clouds, the amplification of magnetic fields, and the re-acceleration and ...
Chian, A. C. -L. +9 more
core +2 more sources
Measurement of Interstellar Extinction in Emission Line Stars [PDF]
Symposium - International Astronomical Union, 1970 Usually selective interstellar extinction is derived by comparing the spectrum of a reddened star with an unreddened nearby star, preferably of the same spectral type. But in many cases this comparison is not possible, so that new methods have to be used.A direct measure of this quantity is possible when a spectrum shows a number of emission lines as ...
openaire +1 more source
Laboratory Measurement of Millimeter-wave Transitions of 13CH2DOH for Astronomical Use
The Astrophysical Journal, 2022 Methanol (CH _3 OH) is an abundant interstellar species and is known to be an important precursor of various interstellar complex organic molecules. Among the methanol isotopologues, CH _2 DOH is one of the most abundant isotopologues and it is often ...
Yuki Ohno +7 more
doaj +1 more source