Results 81 to 90 of about 4,742 (219)

Mirror Mode Mediated EMIC Wave Generation in the Magnetosheath

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Electromagnetic ion cyclotron (EMIC) waves and mirror modes (MMs), both driven by ion temperature anisotropy, are commonly observed in planetary magnetosheaths. Conventional explanations for their co‐occurrence are largely based on linear instability theory in proton–electron plasmas, which requires comparable growth rates for the EMIC and MM ...
Yifan Wu, Chen Shi, Xiaoman Liu, Lei Dai, Jinsong Zhao, Xin Tao   +5 more
wiley   +1 more source

Detection of Diffuse Interstellar [O II] Emission from the Milky Way Using Spatial Heterodyne Spectroscopy

, 2006
Using a newly developed spatial heterodyne spectrometer (SHS), we have obtained the first radial velocity resolved emission-line profiles of diffuse [O II] 3726 and 3729 angstrom emission lines from the warm (10,000 K) ionized component of our Galaxy ...
Roesler, F. L., Jaehnig, K. P., Mierkiewicz, E. J., Reynolds, R. J., Harlander, J. M.   +4 more
core   +1 more source

The HI Distribution Observed toward a Halo Region of the Milky Way

Galaxies, 2017
We use observations of the neutral atomic hydrogen (HI) 21-cm emission line to study the spatial distribution of the HI gas in a 80° × 90° region of the Galaxy halo.
Ericson López, Jairo Armijos, Mario Llerena, Franklin Aldás   +3 more
doaj   +1 more source

EUVE measurement of the local interstellar wind and geocorona via resonance scattering of solar He I 584-Å line emission

, 1998
International audienceWe present results from EUVE measurements obtained during the all-sky survey of interplanetary and geocoronal He I 584-Å emission.
Vallerga, J., Gladstone, G., R., Dalaudier, Francis, Flynn, B.   +3 more
core   +1 more source

Optical Emission Lines from Warm Interstellar Clouds: A Decisive Test of the Decaying Neutrino Theory [PDF]

The Astrophysical Journal, 1998
Recently developed instruments such as the Taurus Tunable Filter and WHAM should be able to detect some or all of the optical emission lines H$α$, [OI] $λ$6300, [SII] $λ$6717, [NI] $λ$ 5200 and [NII] $λ$6584 from warm interstellar clouds such as those observed by Spitzer $&$ Fitzpatrick (1993) (SF) along the line of sight to the halo star HD93521 ...
openaire   +2 more sources

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, Volume 347, Issue 3, March 2026.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source

The interpretation of water emission from dense interstellar clouds

, 2007
Context. Existing SWAS observations and future HIFI/Herschel data require a clear sense of the information content of water emission and absorption lines. Aims.
D. R. Poelman, Tielens, A. G. G. M., A. G. G. M. Tielens, Spaans, M., M. Spaans, Poelman, D. R.   +5 more
core   +1 more source

A Catalog of Hα Emission-line Stars and 785 Newly Identified Young Stellar Object Candidates from LAMOST Based on a Deep Learning Method

The Astrophysical Journal Supplement Series
The H α emission line commonly appears in the spectra of many stars and serves as a key indicator for tracing ionized interstellar gas, investigating stellar activity, and studying gas dynamics.
Lei Tan, Ying Mei, Jiale Qian, Xiaolong Wang, Yue Cui, Aixin Huang, Feng Wang, Hui Deng, Chao Liu, Huanbin Chi   +9 more
doaj   +1 more source

COLLISIONAL EXCITATION OF FAR-INFRARED LINE EMISSIONS FROM WARM INTERSTELLAR CARBON MONOXIDE (CO) [PDF]

The Astrophysical Journal, 2012
Motivated by recent observations with Herschel/PACS, and the availability of new rate coefficients for the collisional excitation of CO (Yang et al. 2010), the excitation of warm astrophysical CO is revisited with the use of numerical and analytic methods.
openaire   +2 more sources

Atmospheric and Deposition Responses of 10Be to Volcanic Eruptions Inferred From the Aerosol‐Climate Model ECHAM6.3‐HAM2.3‐SALSA2.0: 10Be

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract 10Be deposition in ice cores is widely used for solar reconstructions, but its interpretation is complicated by volcanic influences. Using the state‐of‐the‐art aerosol‐climate model ECHAM6.3‐HAM2.3‐SALSA2.0: 10Be, we assess the impacts of three major volcanic eruptions: Agung (1963), El Chichón (1982) and Pinatubo (1991). All eruptions enhance
Minjie Zheng, Raimund Muscheler, Anton Laakso, Florian Adolphi, Zhengyao Lu, Mousong Wu, Peng Chen, Qin Tao, Ulrike Lohmann   +8 more
wiley   +1 more source