Results 61 to 70 of about 41,478 (242)

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

, 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, Cardelli, Cecchi-Pestellini, Donn, Draine, Draine, Draine, Fitzpatrick, Klacka, Li, Li, Li, Mathis, Pendorf, Platt, Pritesh Ranadive, Ranjan Gupta, Roy, Roy, Subodh K. Sharma, Weingartner   +20 more
core   +1 more source

Interstellar Extinction and Polarization of Stars in the Open Cluster NGC 7160 [PDF]

, 2021
Gregory A. Topasna, R. W. Riley, N. Kaltcheva   +2 more
openalex   +1 more source

Microalgae: A Solution for Food Security and Multiplanetary Farming

Food 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

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

Interstellar Extinction in the Gaia Photometric Systems

Open 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

Structure in the Interstellar-Extinction Curve

The 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

A Tale of Two Mysteries in Interstellar Astrophysics: The 2175 Angstrom Extinction Bump and Diffuse Interstellar Bands

, 2011
The diffuse interstellar bands (DIBs) are ubiquitous absorption spectral features arising from the tenuous material in the space between stars -- the interstellar medium (ISM).
Li, Aigen, Xiang, F. Y., Zhong, J. X.
core   +1 more source

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

Critical Quarterly, EarlyView.
Anna Hartnell
wiley   +1 more source

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

Chirality, 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, Jun‐ichi Takahashi, Hiroshi Ota, Koichi Matsuo, Mohamed I. A. Ibrahim, Taketoshi Minato, Gen Fujimori, Masahiro Katoh, Kensei Kobayashi, Yoko Kebukawa, Hiroaki Nakamura   +10 more
wiley   +1 more source

Polycyclic Aromatic Hydrocarbon Molecules and the 2175 Angstrom Interstellar Extinction Bump [PDF]

, 2023
Qi Lin, Xuejuan Yang, Aigen Li
openalex   +1 more source