Results 81 to 90 of about 210,358 (255)

Evidence of a Cloud–Cloud Collision from Overshooting Gas in the Galactic Center

The Astrophysical Journal, 2023
The Milky Way is a barred spiral galaxy with bar lanes that bring gas toward the Galactic center. Gas flowing along these bar lanes often overshoots, and instead of accreting onto the Central Molecular Zone (CMZ), it collides with the bar lane on the ...
Savannah R. Gramze, Adam Ginsburg, David S. Meier, Juergen Ott, Yancy Shirley, Mattia C. Sormani, Brian E. Svoboda   +6 more
doaj   +1 more source

Search for the Infrared Emission Features from Deuterated Interstellar Polycyclic Aromatic Hydrocarbons

, 2013
We report the results of a search for emission features from interstellar deuterated polycyclic aromatic hydrocarbons (PAHs) in the 4um region with the Infrared Camera (IRC) onboard AKARI.
Kaneda, Hidehiro, Mori, Tamami I., Ohsawa, Ryou, Okada, Yoko, Onaka, Takashi, Sakon, Itsuki, Tanaka, Masahiro   +6 more
core   +1 more source

Faint Optical Line Emission from the Diffuse Interstellar Medium: Observations and Implications [PDF]

Symposium - International Astronomical Union, 1990
Diffuse galactic Hα emission appears to cover the entire sky with an intensity that ranges from 3–12 R near the galactic equator to 0.25–0.8 R near the galactic poles. Observations of this H-recombination line and the forbidden lines, [S II] 6716 Å, [N II] 6583 Å, and [O III] 5007 Å, indicate that the emission originates from a low-density, 2–3 kpc ...
openaire   +1 more source

Beyond Sight: Neuromorphic Synapses Triggered by Invisible Light

Small, Volume 22, Issue 10, 17 February 2026.
This review collects advancements in neuromorphic and optoelectronic devices, offering a structured analysis based on stimulus energy levels and architectural designs within the invisible spectrum. By categorizing recent research according to utilized wavelengths, specifically X‐ray, UV, and IR ranges, the study highlights diverse synaptic properties ...
Jisoo Park, Kyounghoon Kim, Eun Kwang Lee, Young‐Joon Kim, Hocheon Yoo   +4 more
wiley   +1 more source

Low-frequency Absorption and Radio Recombination Line Features of the Galactic Center Lobe

The Astrophysical Journal
The Galactic center lobe (GCL) is a ∼1° object located north of the Galactic center. In the mid-infrared, the GCL appears as two 8.0 μ m filaments that roughly define an ellipse.
Natasha Hurley-Walker, L. D. Anderson, M. Luisi, N. M. McClure-Griffiths, Robert A. Benjamin, Michael A. Kuhn, Dylan J. Linville, B. Liu, Catherine Zucker   +8 more
doaj   +1 more source

Optical Design of the far Ultraviolet Imaging Spectrograph [PDF]

Journal of Astronomy and Space Sciences, 1998
We present the design specifications and the performance estimation of the FUVS (Far Ultraviolet Spectrograph) proposed for the observations of aurora, day/night airglow and astronomical objects on small satelltes in the spectral range of . The design of
K. S. Ryu, K. I. Seon, K. W. Min, J. Edelstein   +3 more
doaj  

RadioAstron probes the ultra-fine spatial structure in the H$_2$O maser emission in the star forming region W49N [PDF]

, 2019
H$_2$O maser emission associated with the massive star formation region W49N were observed with the Space-VLBI mission RadioAstron. The procedure for processing of the maser spectral line data obtained in the RadioAstron observations is described.
Alakoz, A. V., Avdeev, V. Y., Imai, H., Moran, J. M., Shakhvorostova, N. N., Sobolev, A. M.   +5 more
core   +1 more source

Far-infrared line emission from high-redshift galaxies [PDF]

, 2013
By combining high resolution, radiative transfer cosmological simulations of z~6 galaxies with a sub-grid multi-phase model of their interstellar medium we derive the expected intensity of several far infrared (FIR) emission lines ([C II] 158 micron, [O ...
L. Vallini, S. Gallerani, A. Ferrara, S. Baek   +3 more
semanticscholar   +1 more source

Sampling the volcanic plumes at Io: Impact speeds and shock conditions

Meteoritics &Planetary Science, Volume 61, Issue 2, Page 241-271, February 2026.
Abstract The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that ...
M. J. Burchell, R. C. Ogliore, P. J. Wozniakiewicz   +2 more
wiley   +1 more source

Resolved Measurements of the CO-to-H2 Conversion Factor in 37 Nearby Galaxies

The Astrophysical Journal
We measure the CO-to-H _2 conversion factor ( α _CO ) in 37 galaxies at 2 kpc resolution, using the dust surface density inferred from far-infrared emission as a tracer of the gas surface density and assuming a constant dust-to-metal ratio.
I-Da Chiang, Karin M. Sandstrom, Jérémy Chastenet, Alberto D. Bolatto, Eric W. Koch, Adam K. Leroy, Jiayi Sun, Yu-Hsuan Teng, Thomas G. Williams   +8 more
doaj   +1 more source