Results 71 to 80 of about 40,765 (217)

Structure in the Interstellar-Extinction Curve

open access: yesThe Astrophysical Journal, 1971
Using photographic techniques, it was attempted to obtain spectra of the interstellar material at a resolution of about 5 A. Three classes of structures are discussed. It is pointed out that the optical observations can be extended into the UV with a resolution of 0.4 A using the OAO-C telescope.
openaire   +2 more sources

Interstellar Migration, the Population ‘Problem’ and the Climate Emergency

open access: yes
Critical Quarterly, Volume 68, Issue 1, Page 103-119, April 2026.
Anna Hartnell
wiley   +1 more source

Microalgae: A Solution for Food Security and Multiplanetary Farming

open access: yesFood Frontiers, Volume 6, Issue 3, Page 1242-1251, May 2025.
ABSTRACT Human civilization is threatened by food insecurity and habitat loss owing to the cumulative effects of anthropogenic and natural factors. Thus, increasing food production while using fewer resources and exploring the potential of interstellar migration is essential.
Xiulan Xie, Jiasui Zhan, Maozhi Ren
wiley   +1 more source

Interstellar Extinction in the Gaia Photometric Systems

open access: yesOpen Astronomy, 2003
Three medium-band photometric systems proposed for the Gaia space mission are intercompared in determining color excesses for stars of spectral classes from O to M at V = 18 mag.
Bridžius A., Vansevičius V.
doaj   +1 more source

Non-uniform extinction in young open star clusters [PDF]

open access: yes, 2001
The extinction law and the variation of colour excess with position, luminosity as well as spectral class in young open star clusters NGC 663, NGC869, NGC 884, NGC 1502, NGC 1893, NGC 2244, NGC 2264, NGC 6611, Tr 14, Tr 15,Tr 16, Coll 228, Tr 37 and Be ...
Sagar, Ram, Yadav, R. K. S.
core   +3 more sources

Emergence of Optical Activity and Surface Morphology Changes in Racemic Amino Acid Films Under Circularly Polarized Lyman‐α Light Irradiation

open access: yesChirality, Volume 36, Issue 11, November 2024.
The photoreaction induced by Lyman‐α circularly polarized light (CPL) irradiation in racemic alanine film is more complex than simple preferential photolysis of enantiopure alanine molecules, and formation of larger molecules is observed. Circular networks of order of 100 nm scale are introduced in the alanine film surface by the irradiation.
Masahiro Kobayashi   +10 more
wiley   +1 more source

Analyzing dust particle size and size distribution on extracted particles by SEM and comparing with light scattering techniques

open access: yesPlasma Processes and Polymers, Volume 21, Issue 8, August 2024.
A comparison is presented between Kinetic Mie Polarimetry and Scanning Electron Microscopy of plasma‐grown amorphous hydrogenated carbon (a‐C:H) particles. The analysis includes particle size distributions, which show that the standard deviation grows linearly, resulting in a constant shape.
Andreas Petersen   +5 more
wiley   +1 more source

An All-sky 3D Dust Map Based on Gaia and LAMOST

open access: yesThe Astrophysical Journal Supplement Series
We present a comprehensive 3D dust-reddening map covering the entire Milky Way, constructed by combining reddening estimates based on Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST) low-resolution spectra ( E ( B  −  V ) _LAMOST ) with ...
Tao Wang   +8 more
doaj   +1 more source

Interstellar extinction toward symbiotic stars

open access: yes, 2020
Using diffuse interstellar bands (DIBs) at 5780 A, 5797 A and 6613 A, visible in the high resolution spectra, and measuring their equivalent widths, we estimate the interstellar extinction toward seven symbiotic stars. We find $E_{B-V}$= $1.28 \pm 0.10$ for AS 289, $E_{B-V}$= $1.55 \pm 0.10$ for BI Cru, $E_{B-V}$= $0.63 \pm 0.10$ for HD330036, $E_{B-V}$
Zamanov, R. K.   +2 more
openaire   +2 more sources

Probing the Distinct Extinction Law of the Pillars of Creation in M16 with JWST

open access: yesThe Astrophysical Journal Letters
Investigating 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

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