Results 61 to 70 of about 63,480 (217)

The Structure of the Local Interstellar Medium. VII. Additional New Mg ii, Fe ii, and Mn ii Observations toward Stars within 100 pc

The Astrophysical Journal
We present new high-resolution ( R  ∼ 114,000), near-ultraviolet spectra in the direction of 36 nearby (
Azmain H. Nisak, Seth Redfield, Jeffrey L. Linsky, Brian E. Wood, Allison Youngblood   +4 more
doaj   +1 more source

A Study of Interstellar Gas and Stars in the Gravitationally Lensed Galaxy `The Cosmic Eye' from Rest-Frame Ultraviolet Spectroscopy [PDF]

, 2009
We report the results of a study of the rest-frame UV spectrum of the Cosmic Eye, a luminous Lyman break galaxy at z=3.07331 gravitationally lensed by a factor of 25.
Alice E. Shapley, Anna M. Quider, Belokurov, Belokurov, Cabanac, Calzetti, Chabrier, Charles C. Steidel, Coppin, Crowther, Daniel P. Stark, Dye, Dye, Erb, Erb, Erb, Estrada, Finkelstein, Förster Schreiber, Hainline, Halliday, Jenkins, Jenkins, Kennicutt, Kewley, Kornei, Kubo, Kudritzki, Law, Law, Leitherer, Leitherer, Lemoine-Busserolle, Lin, Maiolino, Martin, Martin, Max Pettini, Meurer, Morton, Noterdaeme, Ofek, Pagel, Pettini, Pettini, Pettini, Pettini, Pettini, Pettini, Pontzen, Quider, Reddy, Reddy, Reddy, Rix, Rupke, Salpeter, Seitz, Shapley, Shapley, Sheinis, Shin, Siana, Siana, Smail, Stark, Steidel, Steidel, Steidel, Swinbank, Swinbank, Teplitz, Vanzella, Weiner, Wen, Yuan   +75 more
core   +2 more sources

Influence of Mars Topography on Radiation Dose Detected by the Mars Science Laboratory and Assessment of Mars Surface Albedo Radiation

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The Radiation Assessment Detector (RAD) on the Curiosity rover has been characterizing the Martian surface radiation field since 2012. The dose observed by RAD is influenced by a variety of factors, including an essential one, the terrain. After parking near Murray Buttes in September 2016 where it first detected a ∼5% decrease in dose rate ...
Jingnan Guo, Changqi Tian, Gabin Charpentier, Robert F. Wimmer‐Schweingruber, Salman Khaksarighiri, Lu Pan, Jan Leo Löwe, Bent Ehresmann, Donald M. Hassler, Cary Zeitlin, Daniel Matthiä, Thomas Berger, Günther Reitz   +12 more
wiley   +1 more source

The silicate absorption profile in the ISM towards the heavily obscured nucleus of NGC 4418 [PDF]

, 2015
The 9.7-micron silicate absorption profile in the interstellar medium provides important information on the physical and chemical composition of interstellar dust grains.
Alonso-Herrero, A., Gonzalez-Martin, O., Roche, P. F.   +2 more
core   +2 more sources

Early-type stars observed in the ESO UVES Paranal Observatory Project - V. Time-variable interstellar absorption

, 2015
The structure and properties of the diffuse interstellar medium (ISM) on small scales, sub-au to 1 pc, are poorly understood. We compare interstellar absorption-lines, observed towards a selection of O- and B-type stars at two or more epochs, to search ...
Dufton, Philip L., Keenan, Francis P., Kennedy, Michael B., Lambert, David L., Lauroesch, James T., McEvoy, Catherine M., Smith, Keith T., Smoker, Jonathan V., Welty, Daniel E.   +8 more
core   +1 more source

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

Electronic Spectroscopy of C60+ and Its Analogs C60H2O+, C60H+, C60D+, and C60Mg+

The Astrophysical Journal
The fullerenes C _60 and C _70 have been detected in various interstellar environments, and the cation ${{{\rm{C}}}_{60}}^{+}$ has been identified as a carrier of at least four of the diffuse interstellar bands (DIBs). Based on the presence of fullerenes
Lisa Ganner, Gabriel Schöpfer, Alexander Ebenbichler, Stefan Bergmeister, Milan Ončák, Helgi Rafn Hrodmarsson, Elisabeth Gruber   +6 more
doaj   +1 more source

X-Ray Spectroscopy of Interstellar Carbon: Evidence for Scattering by Carbon-bearing Material in the Spectrum of 1ES 1553+113

The Astrophysical Journal, 2023
Molecules and particles make up ∼40%–70% of carbon in the interstellar medium, yet the exact chemical structure of these constituents remains unknown. We present carbon K-shell absorption spectroscopy of the Galactic interstellar medium obtained with the
John Staunton, Frits Paerels
doaj   +1 more source

On the Absorption and Emission Properties of Interstellar Grains

, 2005
Our current understanding of the absorption and emission properties of interstellar grains are reviewed. The constraints placed by the Kramers-Kronig relation on the wavelength-dependence and the maximum allowable quantity of the dust absorption are ...
Li, Aigen
core   +1 more source

Characterizing the Signals and Backgrounds in a Low Earth Orbiting Cherenkov Detector, and Background Mitigation Strategies

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Cherenkov detectors have been used in space for decades to measure Galactic Cosmic Rays (GCRs), Solar Energetic Particles (SEPs) and trapped particles. We present proof‐of‐concept GRAS/Geant4 simulations to both show that a cubic fused silica Cherenkov detector with SiPM in LEO has a good sensitivity to SEP and GCR protons as a function of cut‐
C. S. W. Davis, F. Lei, K. Ryden, C. Dyer, G. Santin, P. Jiggens, M. Heil   +6 more
wiley   +1 more source