Results 61 to 70 of about 40,765 (217)

Writing Against Fate: Climate Strategies and Subversions in Kim Stanley Robinson's The Ministry for the Future

open access: yesFuture Humanities, Volume 3, Issue 2, November 2025.
ABSTRACT Climate fiction's dominant futurist imaginaries trend towards resolved futures, particularly in apocalyptic and techno‐utopian representations of our climate futures. These closure‐driven narratives treat the future as a fated, distant event, limiting climate fiction's interrogation of human agency, responsibility, and potential action in the ...
Maryn Gardner
wiley   +1 more source

On the Interstellar Extinction Curve toward HD 93222, a Sight Line with an Exceedingly Narrow 2175 Å Extinction Bump

open access: yesThe Astrophysical Journal
The 2175 Å extinction bump, the most prominent spectral feature superimposed on the interstellar extinction curve, is widely seen in the interstellar medium of the Milky Way and external galaxies, both near and far.
Qian Wang, Aigen Li, X. J. Yang
doaj   +1 more source

Ultraviolet Passbands for a Space Multicolor Photometric System

open access: yesOpen Astronomy, 2003
The results of search for the optimal location of ultraviolet passbands for an extra-atmospheric photometric system are given. The addition of passbands near the well-known extinction bump at 218 nm to the photometric system makes it possible to ...
Ambartsoumian A. R.   +2 more
doaj   +1 more source

Analytic formulas for frequency and size dependence of absorption and scattering efficiencies of astronomical polycyclic aromatic hydrocarbons

open access: yes, 2012
In a series of two recent papers, the frequency and size distribution dependence of extinction spectra for astronomical silicate and graphite grains was analyzed by us in the context of MRN type interstellar dust models.
Ashim K. Roy   +20 more
core   +1 more source

Calibration of Electrically Short Antennas Using the l = 2 Spherical Harmonic Expansion Coefficients of the Radio Brightness Distribution on the Sky Between 0.5 and 6.8 MHz

open access: yesRadio Science, Volume 60, Issue 8, August 2025.
Abstract A space‐borne radio‐frequency antenna is typically located in the vicinity of a conductive spacecraft body that influences its beam. Also, at wavelengths that greatly exceed the sizes of such an antenna and spacecraft, the antenna is expected to have the beam of an equivalent short dipole.
Brent Page   +3 more
wiley   +1 more source

On the Origin of the North Celestial Pole Loop

open access: yesThe Astrophysical Journal, 2023
The North Celestial Pole Loop (NCPL) provides a unique laboratory for studying the early-stage precursors of star formation. Uncovering its origin is key to understanding the dynamical mechanisms that control the evolution of its contents. In this study,
Antoine Marchal, Peter G. Martin
doaj   +1 more source

The Multiwavelength Extinction Law and Its Variation in the Coalsack Molecular Cloud Based on the Gaia, APASS, SMSS, 2MASS, GLIMPSE, and WISE Surveys

open access: yesThe Astrophysical Journal
Accurate interpretation of observations relies on the interstellar dust extinction law, which also serves as a powerful diagnostic for probing dust properties.
Juan Deng   +3 more
doaj   +1 more source

Interstellar Extinction of Planetary Nebulae [PDF]

open access: yesSymposium - International Astronomical Union, 1993
We have compared the extinction of planetary nebulae (PN) as derived from the Balmer decrement and from the ratio of radio to Hβ fluxes.
G. Stasinska   +3 more
openaire   +1 more source

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

open access: yesComputer 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   +3 more
wiley   +1 more source

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

open access: yesThe 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   +5 more
doaj   +1 more source

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