Results 41 to 50 of about 30,446 (206)

The Near-infrared Extinction Law at High and Low Galactic Latitudes

The Astrophysical Journal
The Milky Way dust extinction curve in the near-infrared (NIR) follows a power-law form, but the value of the slope, β _NIR , is debated. Systematic variations in the slope of the Milky Way UV extinction curve are known to be correlated with variations ...
Robert E. Butler, Samir Salim
doaj   +1 more source

On Absorption by Circumstellar Dust, With the Progenitor of SN2012aw as a Case Study

, 2012
We use the progenitor of SN2012aw to illustrate the consequences of modeling circumstellar dust using Galactic (interstellar) extinction laws that (1) ignore dust emission in the near-IR and beyond; (2) average over dust compositions, and (3) mis ...
C. S. Kochanek, Draine, Fraser, Freedman, Gehrels, Goobar, Immler, Ivezic, Ivezic, Kochanek, Kochanek, Massey, Matzner, Moretti, O'Connor, Prieto, R. Khan, Soderberg, Stockdale, Sugerman, Szczygieł, Thompson, Ugliano, Van Dyk, Wang, X. Dai, Yadav   +26 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

SWIFTULTRAVIOLET OBSERVATIONS OF SUPERNOVA 2014J IN M82: LARGE EXTINCTION FROM INTERSTELLAR DUST [PDF]

The Astrophysical Journal, 2015
We present optical and ultraviolet (UV) photometry and spectra of the very nearby and highly reddened supernova (SN) 2014J in M82 obtained with the Swift Ultra-Violet/Optical Telescope (UVOT). Comparison of the UVOT grism spectra of SN~2014J with Hubble Space Telescope observations of SN2011fe or UVOT grism spectra of SN~2012fr are consistent with an ...
Peter J. Brown, Michael T. Smitka, Lifan Wang, Alice Breeveld, Massimiliano de Pasquale, Dieter H. Hartmann, Kevin Krisciunas, N. Paul Kuin, Peter A. Milne, Mat Page, Michael Siegel   +10 more
openaire   +4 more sources

Far-ultraviolet Dust Extinction and Molecular Hydrogen in the Diffuse Milky Way Interstellar Medium

The Astrophysical Journal, 2023
Abstract We aim to compare variations in the full-UV dust extinction curve (912–3000 Å), with the H i/H2/total H content along diffuse Milky Way sightlines, to investigate possible connections between ISM conditions and dust properties. We combine an existing sample of 75 UV extinction curves based on IUE and FUSE data, with atomic and ...
Dries Van De Putte, Stefan I. B. Cartledge, Karl D. Gordon, Geoffrey C. Clayton, Julia Roman-Duval   +4 more
openaire   +4 more sources

Climate Emergency and Different Ways to Fail? The Fermi Paradox, the Simulation Hypothesis, Agency and Hope

Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.
ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley   +1 more source

The Impact of Accurate Extinction Measurements for X-ray Spectral Models

, 2015
Interstellar extinction includes both absorption and scattering of photons from interstellar gas and dust grains, and it has the effect of altering a source's spectrum and its total observed intensity.
Corrales, Lia, Smith, Randall K., Valencic, Lynne A.   +2 more
core   +1 more source

The Flattest Infrared Extinction Curve in Four Isolated Dense Molecular Cloud Cores

The Astrophysical Journal Letters
The extinction curve of interstellar dust in the dense molecular cloud cores is crucial for understanding dust properties, particularly size distribution and composition.
Jun Li, Bingqiu Chen, Biwei Jiang, He Zhao, Botao Jiang, Xi Chen   +5 more
doaj   +1 more source

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source

The 2200 A bump and the UV extinction curve

, 2012
The 2200 A bump is a major figure of interstellar extinction. Extinction curves with no bump however exist and are, with no exception, linear from the near-infrared down to 2500 A at least, often over all the visible-UV spectrum.
Bondar, Bradley, Cardelli, Cecchi-Pestellini, Divan, Désert, Fitzpatrick, Gordon, Herbig, Li, Li, Mulas, Nandy, Papoular, Savage, Schalén, Seaton, Steglich, Wegner, Whitford, Wickramasinghe, Wu, Yastrebov, Zagury, Zagury, Zagury, Zagury, Zagury, Zagury, Zagury, Zagury, Zagury, Zagury, Zonca   +33 more
core   +1 more source