Results 121 to 130 of about 210,358 (255)
Comparison of Global H i and Hα Line Profiles in MaNGA Galaxy Pairs with FAST
The Astrophysical JournalWe present case studies comparing the global H i and H α emission line profiles of six galaxy pairs. The six pairs are selected to have different nuclear activities, with two hosting an active galactic nucleus, and in different merging stages—two of each
Gaoxiang Jin +5 more
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Diffuse Ionized Gas in the Anticenter of the Milky Way
The Astronomical JournalUsing data from the Large Area Multi-Object fiber Spectroscopic Telescope Medium-Resolution Spectroscopic Survey of Nebulae, we create a sample of 17,821 diffuse ionized gas spectra in the anticenter region of the Milky Way by excluding fibers in the ...
Shiming Wen +12 more
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Lyman alpha radiation in external galaxies [PDF]
The Ly alpha line of atomic hydrogen is often a luminous component of the radiation emitted by distant galaxies. Except for those galaxies which have a substantial central source of non-stellar ionizing radiation, most of the Ly alpha radiation emitted ...
Mckee, Christopher F., Neufeld, David A.
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K-alpha X-rays from cosmic ray oxygen [PDF]
Equilibrium charge fractions are calculated for subrelativistic cosmic ray oxygen ions in the interstellar medium. These are used to determine the expected flux of K-alpha rays arising from atomic processes for a number of different postulated ...
Boldt, E. A., Pravdo, S. H.
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Interstellar absorption in the MG II resonance line k2 and h2 emissions
The Astrophysical Journal, 1981 High-resolution (0.2 A) IUE spectra for the long wavelength range (1800-3000 A) have been studied. It is shown that narrow interstellar Mg II lines are seen in the center of the k2 and h2 emissions from nearby stars with large rotational velocities. For all observed stars, the radial velocity of the central k3 absorption component in the rest system of
openaire +1 more source
The Astrophysical JournalMethanol is one of the most abundant complex organic molecules in interstellar environments. Molecular lines of its rare isotopologues ^12 CH _3 ^17 OH and ^12 CH _3 ^18 OH therefore play a crucial role in examining the column density of ^12 CH _3 ^16 OH,
Akemi Tamanai +7 more
doaj +1 more source
Gamma-ray line astrophysics [PDF]
Recent observations of gamma-ray line emission from solar flares, gamma-ray bursts, the galactic center, the interstellar medium and the jets of SS433 are reviewed.
Lingenfelter, R. E., Ramaty, R.
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Spectroscopic Observations of Lyman-Break Galaxies at Redshift ~ 4, 5 and 6 in the GOODS-South Field
, 2009 We report on observations of Lyman-break galaxies (LBGs) selected from the Great Observatories Origins Deep Survey at mean redshift z~4, 5 and 6, obtained with FORS2 spectrograph at the ESO-VLT.This program has yielded spectroscopic identifications for ...
Cesarsky, C. +13 more
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The [C II] line emission as an interstellar medium probe in the MARIGOLD galaxies
Astronomy & AstrophysicsContext. The [C II] fine-structure line at 157.74 μm is one of the brightest far-infrared emission lines in galaxies and an important probe of galaxy properties such as the star formation rate (SFR) and the molecular gas mass (Mmol). Aims. Using high-resolution numerical simulations, we tested the reliability of the [C II] line as a tracer of Mmol in ...
Prachi Khatri +2 more
openaire +2 more sources
The Astrophysical Journal, 1992 Spatial heterodyne spectroscopy (SHS) is a new instrumental technique for interference spectroscopy which promises to extend into the FUV (1200-2000 A) spectral region the large throughput advantage at high spectral resolution usually associated with Fabry-Perot and Michelson interferometers.
J. Harlander +2 more
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