Results 31 to 40 of about 63,480 (217)
, 2002 In this paper, we study heliospheric Ly-$\alpha$ absorption toward nearby stars in different lines of sight. We use the Baranov-Malama model of the solar wind interaction with a two-component (charged component and H atoms) interstellar medium ...
Baranov +43 more
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Microstructure of the Local Interstellar Cloud and the Identification of the Hyades Cloud [PDF]
, 2001 We analyze high-resolution UV spectra of the Mg II h and k lines for 18 members of the Hyades Cluster to study inhomogeneity along these proximate lines of sight.
Diamond C. J. +14 more
core +2 more sources
Observations of Multiphase, High-velocity, Shocked Gas in the Vela Supernova Remnant
The Astrophysical Journal, 2023 We present an analysis of high-resolution far-UV archival spectra obtained with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope of the star HD 75309, which probes high-velocity shocked gas in the Vela supernova remnant (SNR).
Adam M. Ritchey
doaj +1 more source
Absorption by Spinning Dust: a Contaminant for High-Redshift 21 cm Observations
, 2018 Spinning dust grains in front of the bright Galactic synchrotron background can produce a weak absorption signal that could affect measurements of high redshift 21 cm absorption.
Draine, B. T., Miralda-Escudé, Jordi
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Observations of interstellar Lyman-α absorption [PDF]
Symposium - International Astronomical Union, 1970 Absorption at the Lyman-α transition from interstellar neutral hydrogen has been observed in the ultraviolet spectra of 18 nearby O and B stars. Radiation damping is the dominant cause of line broadening, which makes the derived line-of-sight column densities proportional to the square of the observed equivalent widths.
openaire +1 more source
Distribution of Interstellar Reddening Material in the Galactic Plane [PDF]
Journal of Astronomy and Space Sciences, 1987 By using the recently determined color excess and distance data of classical cepheids by Kim(1985), the distribution of interstellar reddening material was studied to see the general picture of the average rate of interstellar absorption out to about 7 ...
Chulhee Kim
doaj
GHRS and ORFEUS-II Observations of the Highly Ionized Interstellar Medium Toward ESO141-055 [PDF]
, 1999 We present Goddard High Resolution Spectrograph and ORFEUS-II measurements of Si IV, CIV, N V, and O VI absorption in the interstellar medium of the Galactic disk and halo toward the nucleus of the Seyfert galaxy ESO141-055.
Berkhuijsen E. +10 more
core +2 more sources
The Complex Interstellar Na I Absorption toward h and Chi Persei
, 2004 Recent high spatial and spectral resolution investigations of the diffuse interstellar medium (ISM) have found significant evidence for small-scale variations in the interstellar gas on scales less than or equal to 1 pc.
Lauroesch, James T. +2 more
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Small-Scale Variations of HI Spectra from Interstellar Scintillatio [PDF]
, 2001 I suggest that radio-wave scattering by the interstellar plasma, in combination with subsonic gradients in the Doppler velocity of interstellar HI, is responsible for the observed small-scale variation in HI absorption spectra of pulsars.
C. R. Gwinn +5 more
core +3 more sources
Kinematics of a high-redshift galaxy: A case study [PDF]
Serbian Astronomical Journal, 2000 A kinematics of a z = 2.81 galaxy toward bright QSO 0528-250, as inferred from the absorption spectroscopy is discussed. There are sufficient arguments for a far-reaching conclusion that we are observing an older, uninvolved version of the local Galactic
Ćirković M.M.
doaj +1 more source