منابع مشابه
Probing ISM Models with Hα observations
I review the capabilities of Hα observations to constrain some aspects of the current models of the interstellar medium. In particular, it is shown that turbulence is a necessary ingredient of any viable model, since most of the energy produced by supernova explosions and ionizing radiation is stored in kinetic form in the ISM. Various forms of turbulent energy dissipation, including cloud coll...
متن کاملProbing supernova ejecta by Hα damping wings
It is predicted that the Hα emission line at the early nebular epoch of type II-P supernovae may display robust observational effects of radiation damping wings. Monte Carlo simulations demonstrate that the Hα line with the optical depth typical of the early nebular epoch acquires extended wings and redshift and becomes broader compared to the Sobolev approximation case. The strength of these e...
متن کاملProbing the Evolution Ofgalaxies Using Redshifted Hα Emission
In this paper we review the present status and implications of Hα surveys at various redshifts. With the advent of sensitive wide-format near-infrared detectors on large telescopes, deep and extensive Hα surveys are now feasible to redshift z ∼ 2.5. The cosmic star formation history can therefore be traced out to this redshift using Hα alone, avoiding complications arising from the comparison o...
متن کاملProbing Supersymmetric Parameters With Astrophysical Observations
A wide range of techniques have been developed to search for particle dark matter, including direct detection, indirect detection, and collider searches. The prospects for the detection of neutralino dark matter is quite promising for each of these three very different methods. Looking ahead to a time in which these techniques have successfully detected neutralino dark matter, we explore the ab...
متن کاملObservations of Hα emission profiles in Aditya tokamak
Emissions from the hydrogen Balmer alpha (λ = 656.28 nm) has been recorded for a large number of plasma discharges in the Aditya tokamak using a 1m Czerny-Turner spectrometer equipped with an 1800 grooves/mm reflection grating [5]. Eight simultaneous vertically collimated line-of-sights, using individual lens – fiber combination from a top port of the tokamak view a poloidal cross-section of th...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Australia
سال: 1998
ISSN: 1323-3580,1448-6083
DOI: 10.1071/as98019