Results 111 to 120 of about 5,560 (224)

Cyclic C4+ as the Carrier of the Diffuse Interstellar Band at 503.9 nm?

The Astrophysical Journal
The diffuse interstellar bands (DIBs) have remained a mystery in astronomy since their discovery over a century ago. The only currently known carrier is ${{\rm{C}}}_{60}^{+}$ , responsible for five DIBs, while more than 550 are yet to be interpreted. The
Serge. A. Krasnokutski, Lisa Ganner, Milan Ončák, Florian Foitzik, Stefan Bergmeister, Fabio Zappa, Paul Scheier, Elisabeth Gruber   +7 more
doaj   +1 more source

Aliphatic hydrocarbon content of interstellar dust

, 2018
There is considerable uncertainty as to the amount of carbon incorporated in interstellar dust. The aliphatic component of the carbonaceous dust is of particular interest because it produces a significant 3.4 mu m absorption feature when viewed against a
Schmidt, TW ; https://orcid.org/, B Günay, Schmidt, T. W., Nauta, K, Kable, SH ; https://orcid.org/, O Krechkivska, Afsar, M, Afsar, M., Krechkivska, O., Rawal, A ; https://orcid.org/, Krechkivska, O, A Rawal, Burton, MG ; https://orcid.org/, K Nauta, Nauta, K., Günay, B, M G Burton, Kable, S. H., Gunay, B., T W Schmidt, Burton, M. G., M Afşar, Rawal, A., Gunay, Burcu, S H Kable   +24 more
core   +1 more source

The influence of cosmic rays on the 3.4 microns interstellar absorption band

, 2011
IAU Symposium 280, Poster 37, Session 3.International audienceA 3.4 μm absorption band, assigned to aliphatic C-H stretching modes of hydrogenated amorphous carbons (a-C:H), is widely observed in diffuse interstellar medium (ISM), but the only absorption
d'Hendecourt, L., Brechignac, P., Godard, M., Carpentier, Y., Dartois, E., Pino, T., Brunetto, R., Engrand, C., Feraud, G., Chabot, M., Duprat, J.   +10 more
core  

Early-type stars observed in the ESO UVES Paranal Observatory Project - V. Time-variable interstellar absorption

, 2015
The structure and properties of the diffuse interstellar medium (ISM) on small scales, sub-au to 1 pc, are poorly understood. We compare interstellar absorption-lines, observed towards a selection of O- and B-type stars at two or more epochs, to search ...
Lambert, David L., McEvoy, Catherine M., Welty, Daniel E., Smoker, Jonathan V., Dufton, Philip L., Kennedy, Michael B., Lauroesch, James T., Keenan, Francis P., Smith, Keith T.   +8 more
core   +1 more source

SPHEREx Widefield Infrared Spectral Mapping of Interstellar Ices and Polycyclic Aromatic Hydrocarbons

The Astrophysical Journal
We present some of the first infrared spectral maps acquired by SPHEREx. These maps, which to our knowledge are the largest of their type ever compiled in the near-infrared, reveal multiple strong lines due to interstellar ices and polycyclic aromatic ...
Joseph L. Hora, Jinyoung K. Noh, Gary J. Melnick, Brandon S. Hensley, Roberta Paladini, Jeong-Eun Lee, Matthew L. N. Ashby, Volker Tolls, Jaeyeong Kim, Michael W. Werner, James J. Bock, Sean Bruton, Shuang-Shuang Chen, Tzu-Ching Chang, Yi-Kuan Chiang, Asantha Cooray, Brendan P. Crill, Ari J. Cukierman, Olivier Doré, Andreas L. Faisst, Zhaoyu Huai, Howard Hui, Woong-Seob Jeong, Miju Kang, Phil M. Korngut, Ho-Gyu Lee, Carey M. Lisse, Daniel C. Masters, Giulia Murgia, Chi H. Nguyen, Zafar Rustamkulov, Ji Yeon Seok, Robin Y. Wen, Yujin Yang, Michael Zemcov   +34 more
doaj   +1 more source

Distance to the Galactic Center 7′ Halo from H I Absorption

The Astrophysical Journal
Using archival data, we have made an H I absorption study of the 7 ${}^{{\prime} }$ halo surrounding the Sgr A complex, observed toward the Galactic center (GC) region. We find strong H I absorption near velocities of −53 km s ^−1 , which is due to the 3
Debangan Maji, Subhashis Roy
doaj   +1 more source

Toward a 2D H I Map of the Local Interstellar Medium

The Astronomical Journal
Obtaining a complete census of gas in the local interstellar medium (LISM;
Allison Youngblood, Kevin France, Tommi Koskinen, James Paul Mason, Seth Redfield, Brian E. Wood, Vincent Bourrier, Leonardo dos Santos, Christopher Johns-Krull, George W. King, Jeffrey L. Linsky, Sarah Peacock   +11 more
doaj   +1 more source

Inverse Raman Scattering and the Diffuse Interstellar Bands: An Exploration of the Systemic Interconnections between Spontaneous and Inverse Raman Scattering and Extended Red Emission, Red Rectangle Bands, and Diffuse Interstellar Bands

The Astrophysical Journal
First identified in 1964, inverse Raman scattering (IRS) is a nonlinear stimulated phenomenon that induces Raman-scattered absorptions where Raman emissions would be expected.
Frédéric Zagury
doaj   +1 more source

Interstellar X-ray Absorption and Scattering

Accurate estimates of the absorption of X-rays by interstellar gas and dust are of crucial importance for the analysis and interpretation of almost all astronomical soft X-ray observations. However, the present X-ray absorption data extensively used by the community were derived from a reduced interstellar abundance (~70% of solar) and ignoring dust ...
Yan, Linli, Li, Aigen, Lu, Fangjun
openaire   +2 more sources

Optical Interstellar Absorption Features [PDF]

Monthly Notices of the Royal Astronomical Society, 1968
W. Buscombe, P. M. Kennedy
openaire   +1 more source