Results 111 to 120 of about 218,608 (214)

Interstellar Molecules [PDF]

, 1978
Observations of the spectral lines of a great many interstellar molecules has made it possible for radio astronomers to construct a scenario for the formation of ...
Knapp, Gillian
core  

The smoothness of the interstellar extinction curve in the UV

, 2012
Context. As revealed by high-resolution spectral investigations in the wavelength range between 300 and 400 nm, the interstellar extinction curve does not display any of the sharp electronic absorption bands that are characteristic for large polyatomic ...
M. Steglich, Y. Carpentier, C. Jäger, Th. Henning, H.-J. Räder, F. Huisken   +5 more
core   +1 more source

Equivalent Width of the Interstellar Na i D1 and D2 Absorption Lines for Stars with E(B−V) < 0.15

New measurements of the equivalent width of the interstellar Na i D1 and D2 absorption lines for 62 bright B-type stars with E(B − V) < 0.15 are used to recalibrate the relation between these quantities in this low-reddening regime, and to quantify the ...
Maxted, Pierre F. L.
core   +1 more source

Interstellar extinction correlations [PDF]

Monthly Notices of the Royal Astronomical Society, 1987
A. P. Jones, W. W. Duley, D. A. Williams
openaire   +1 more source

Extinction of Taurus, Orion, Perseus and California Molecular Clouds Based on the LAMOST, 2MASS, and Gaia Surveys. II. The Extinction Law

The Astronomical Journal
The extinction law from ultraviolet (UV) to infrared (IR; 0.2–24 μ m) is determined by relying on the blue-edge method and color-excess ratios for some nearby molecular clouds, from the low-mass star-forming region to the massive star-forming region. The
ZheTai Cao, Biwei Jiang, Shu Wang, Jun Li   +3 more
doaj   +1 more source

Polycyclic Aromatic Hydrocarbon Molecules and the 2175 Angstrom Interstellar Extinction Bump

, 2023
The exact nature of the 2175 Angstrom extinction bump, the strongest spectroscopic absorption feature superimposed on the interstellar extinction curve, remains unknown ever since its discovery in 1965.
Lin, Qi, Yang, X. J., Li, Aigen
core  

Mapping Interstellar Dust in the Foreground Outer Disk of Overlapping Galaxy Pair VV 191 with HST and JWST

The Astronomical Journal
VV 191 is a nearby ( z ∼ 0.05), overlapping (occulting) galaxy pair, where a multiple-armed spiral galaxy is backlit by an elliptical galaxy. The overlap is used to derive and map dust attenuation in two James Webb Space Telescope NIRCam filters (F090W ...
Clayton D. Robertson, Benne W. Holwerda, Jessica M. Berkheimer, Trevor Butrum, Ian Castellano, Kyle W. Cook, William C. Keel, Anton M. Koekemoer, Divya Patel, Maria del Carmen Polletta, Rogier A. Windhorst   +10 more
doaj   +1 more source

Extinction curves, extinction laws, and the failure of interstellar dust models

The interpretation of ultraviolet Galactic interstellar extinction curves is obscured today by accumulated assumptions, such as a purported link between the 2200 Å bump and metallicity, that are not firmly supported by observations.
Frédéric Zagury
core   +1 more source

CU-JADE: A Method for Traversing Extinction Jumps Along the Line of Sight

The Astronomical Journal
Although interstellar dust extinction serves as a powerful distance estimator, the solar system’s location within the Galactic plane complicates distance determinations, especially for molecular clouds (MCs) at varying distances along the line of sight ...
Shiyu Zhang, Yang Su, Xuepeng Chen, Min Fang, Fujun Du, Shaobo Zhang, Qing-Zeng Yan, Xin Liu, Miaomiao Zhang, Yan Sun, Ji Yang   +10 more
doaj   +1 more source

The Quasar-associated 2175 Å Dust Absorbers in the SDSS DR16 Quasar Catalog

The Astrophysical Journal Supplement Series
We present, for the first time, a systematic study of quasar-associated 2175 Å dust absorbers using spectroscopic data from the Sloan Digital Sky Survey Data Release 16 (DR16).
Shaohua Zhang, Yuchong Luo, Shangchun Xie, Chao Gao, Zhijian Luo, Chenggang Shu, Hubing Xiao   +6 more
doaj   +1 more source