Results 91 to 100 of about 4,742 (219)

Electronic Spectroscopy of Cold Gas‐Phase Ions in a Cryogenic Ion Trap: Vibronic States, Bonding Characteristics, and Photochemistry

Chemistry – An Asian Journal, Volume 21, Issue 4, 25 February 2026.
Recent development of cryogenic ion‐trap‐based instrumentation has extended the scope of gas‐phase laser spectroscopy to a wide variety of nonvolatile ions, including carbocations and protonated hydrocarbons, organic dyes, host‐guest complexes, micro‐hydrated ions, hypervalent ions, metal clusters, and ionic intermediates formed in solution.
Satoru Muramatsu, Masahiro Koyama, Yoshiya Inokuchi   +2 more
wiley   +1 more source

Unveiling Fiber Networks and Core Formation in the DR21 South Filament

The Astronomical Journal
We present high-resolution (∼1000 au) 3 mm observations with the NOrthern Extended Millimeter Array toward the DR21 South Filament (DR21SF), aiming to reveal its internal fragmentation and search for deeply embedded star-forming activities.
Kai Yang, Keping Qiu, Xing Pan
doaj   +1 more source

Contribution of neutral gas to Faraday tomographic data at low frequencies

Astronomy & Astrophysics
Context. The LOFAR observations of diffuse interstellar polarization at meter wavelengths reveal intricate polarized-intensity structures with an unexpected correlation with neutral H i filaments that cannot be reproduced in simulations with a low cold ...
Berat J., Miville-Deschênes M.-A., Bracco A., Hennebelle P., Scholtys J.   +4 more
doaj   +1 more source

LRO/LAMP study of the interstellar medium via the HeI 58.4 nm resonance line

, 2018
Context. Recent measurements by IBEX and detailed modeling have changed our understanding of the flow of the interstellar medium through the solar system. In particular, a time dependence of the direction of the interstellar medium flow has been proposed,
K. D. Retherford, T. K. Greathouse, P. D. Feldman, C. Grava, G. R. Gladstone, W. R. Pryor   +5 more
core   +1 more source

Comparison of Global H i and Hα Line Profiles in MaNGA Galaxy Pairs with FAST

The Astrophysical Journal
We 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, Y. Sophia Dai, Cheng Cheng, Cong Kevin Xu, Jia-Sheng Huang, Lihwai Lin   +5 more
doaj   +1 more source

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

An optical emission line survey of large planetary nebulae

, 2006
Accurate emission line fluxes from planetary nebulae (PNe) provide important constraints on the nature of the final phases of stellar evolution. Large, evolved PNe may trace the latest stages of PN evolution, where material from the AGB wind is returned ...
Haffner, L. Matthew, Reynolds, Ronald J., Madsen, Gregory J., Parker, Quentin A., Frew, David J.   +4 more
core   +1 more source

Diffuse Ionized Gas in the Anticenter of the Milky Way

The Astronomical Journal
Using 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, Wei Zhang, Lin Ma, Yunning Zhao, Man I. Lam, Chaojian Wu, Juanjuan Ren, Jianjun Chen, Yuzhong Wu, Guozhen Hu, Yonghui Hou, Yongheng Zhao, Hong Wu   +12 more
doaj   +1 more source

Spatial heterodyne spectroscopy for the exploration of diffuse interstellar emission lines at far-ultraviolet wavelengths

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, R. J. Reynolds, F. L. Roesler   +2 more
openaire   +1 more source

Probing the interstellar medium of high-redshift sub-millimetre and emission line galaxies [PDF]

, 2018
viii, 68 leaves : colour illustrations ; 29 cmIncludes abstract.Includes bibliographical references (leaves 61-68).Utilizing new ALMA-ACA observations of the [N II] 205 µm line in combination with existing [C II] 158 µm observations, we ...
Cunningham, Daniel J. M.
core