Results 91 to 100 of about 520,436 (213)
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 +12 more
wiley +1 more source
Polycyclic aromatic hydrocarbon and the ultraviolet extinction bump at the cosmic dawn [PDF]
Astronomy & AstrophysicsFirst detected in 1965, the mysterious ultraviolet (UV) extinction bump at 2175Angstrom is the most prominent spectroscopic feature superimposed on the interstellar extinction curve.
Qi Lin +3 more
semanticscholar +1 more source
PROBING X-RAY ABSORPTION AND OPTICAL EXTINCTION IN THE INTERSTELLAR MEDIUM USING CHANDRA OBSERVATIONS OF SUPERNOVA REMNANTS [PDF]
, 2015 We present a comprehensive study of interstellar X-ray extinction using the extensive Chandra supernova remnant (SNR) archive and use our results to refine the empirical relation between the hydrogen column density and optical extinction. In our analysis,
Dillon R. Foight +3 more
semanticscholar +1 more source
DIRECT MEASUREMENT OF INTERSTELLAR EXTINCTION TOWARD YOUNG STARS USING ATOMIC HYDROGEN Lyα ABSORPTION [PDF]
, 2013 Interstellar reddening corrections are necessary to reconstruct the intrinsic spectral energy distributions (SEDs) of accreting protostellar systems.
M. McJunkin +7 more
semanticscholar +1 more source
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
Probing the Distinct Extinction Law of the Pillars of Creation in M16 with JWST
The Astrophysical Journal LettersInvestigating the extinction law in regions of high dust extinction, such as the Pillars of Creation within the M16 region, is crucial for understanding the densest parts of the interstellar medium (ISM).
Jun Li +4 more
doaj +1 more source
Expected value, to a point: Moral decision‐making under background uncertainty
Noûs, Volume 59, Issue 4, Page 1093-1125, December 2025.Abstract Expected value maximization gives plausible guidance for moral decision‐making under uncertainty in many situations. But it has unappetizing implications in ‘Pascalian’ situations involving tiny probabilities of extreme outcomes. This paper shows, first, that under realistic levels of ‘background uncertainty’ about sources of value independent
Christian Tarsney
wiley +1 more source
Interstellar extinction toward the Galactic bulge
, 2019 The past decade has seen rapid progress in studies on the Galactic bulge thanks to many large-scale surveys in both photometric and spectroscopic approaches.
Matsunaga, Noriyuki +1 more
core +1 more source
The Optical Extinction Law Depends on Magnetic Field Orientation: The RV–ψ Relation
The Astrophysical JournalFor aspherical interstellar dust grains aligned with their short axes preferentially parallel to the local magnetic field, the amount of extinction per grain is larger when the magnetic field is along the line of sight and smaller when in the plane of ...
Brandon S. Hensley
doaj +1 more source
Three-dimensional interstellar extinction map toward the Galactic bulge [PDF]
, 2012 Context. Studies of the properties of the inner Galactic bulge strongly depend on the assumptions made about interstellar extinction. Most of the extinction maps available in the literature lack the information about the distance. Aims.
B.-Q. Chen +6 more
semanticscholar +1 more source