Results 71 to 80 of about 21,926 (193)

Diffuse Interstellar Band Profiles [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractA short review of the profiles of diffuse interstellar bands and their possible interpretation is given, largely from the perspective of absorption by gas-phase molecules. Potentially a crucial source of information on the nature of the diffuse band carriers, profile studies provide a promising avenue of research towards finding the solution to
openaire   +1 more source

Diffuse interstellar band formation in dense clouds [PDF]

Astrophysics and Space Science, 1974
Measurements of the strengths of the diffuse interstellar bands at 4430, 5780 and 5797 A show that the bands tend to be weak with respect to extinction in dense interstellar clouds. Data on 10 stars in the Q Ophiuchi cloud complex show further that the diffuse band-producing efficiency of the grains decreases systematically with increasing grain size ...
Snow, Theodore P., Jr., Cohen, Judith G.
openaire   +5 more sources

Unidentified Infrared Emission Bands in the Diffuse Interstellar Medium

, 2000
Using the Mid-Infrared Spectrometer on board the Infrared Telescope in Space and the low-resolution grating spectrometer (PHT-S) on board the Infrared Space Observatory, we obtained 820 mid-infrared (5 to 12 $\mu$m) spectra of the diffuse interstellar ...
Boulanger F., Cesarsky D., Clegg P. E., Dartois E., Duley W. W., d’Hendecourt L. B., Feinstein A., H. Okuda, H. Shibai, Habing H. J., I. Yamamura, Jourdain de Muizon M., K. Okumura, Kessler M., Kin‐Wing Chan, Leger A., Lemke D., M. Mizutani, Mattila K., Mattila K., Murakami H., Okumura K., Omont A., Onaka T., Papoular R., Puget J. L., Roelfsema P. R., T. L. Roellig, T. Nakagawa, T. Onaka, T. Tanabe, Trams N., Verstraete L.   +32 more
core   +2 more sources

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, Volume 347, Issue 3, March 2026.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source

Confined Chemistry in Space: Zeolite‐Supported Fe13 Nanoclusters Modulate CS Reactivity

Small Structures, Volume 7, Issue 3, March 2026.
The study explores how an Fe13 cluster confined in chabazite reshapes the reaction of CS and H2 under astrochemical conditions. Confinement promotes C–S bond cleavage over hydrogenation, directing chemistry toward CH4 and H2S formation. Additional CS enables CS2 and C2 species. Microkinetic analysis identifies protoplanetary environments where zeolites
Gerard Pareras, Albert Rimola
wiley   +1 more source

A Principal Component Analysis of the Diffuse Interstellar Bands [PDF]

The Astrophysical Journal, 2017
Abstract We present a principal component (PC) analysis of 23 line-of-sight parameters (including the strengths of 16 diffuse interstellar bands, DIBs) for a well-chosen sample of single-cloud sightlines representing a broad range of environmental conditions.
T. Ensor, J. Cami, N. H. Bhatt, A. Soddu
openaire   +4 more sources

The abundance of interstellar C60 molecules toward BD+31°643 and other stars

Astronomy & Astrophysics
Context. The diffuse interstellar bands (DIBs) at 9577 and 9632 Å are attributed to electronic transitions of the C60+ fullerene ion; thus, its column density in molecular clouds may be inferred.
Rouillé Gaël, Gredel Roland
doaj   +1 more source

Near-IR Photoluminescence of C60+ and Implications for Astronomy

, 2017
We have observed that C$_{60}^+$ ions isolated in cryogenic matrixes show pronounced near-IR photoluminescence upon excitation in the near-IR range. By contrast UV photoexcitation does not lead to measurable luminescence.
Kappes, Manfred M., Kern, Bastian, Strelnikov, Dmitry   +2 more
core   +1 more source

The Constraint of Crewed Mars Missions Based on Current Radiation Dose Measurements

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Crewed missions to Mars will be a milestone of future space exploration programs. However, the absence of Earth's magnetic field leaves astronauts directly exposed to unattenuated energetic particles in deep space, primarily galactic cosmic rays (GCRs), resulting in significantly higher radiation levels and enhanced health risks. Understanding
Chao Zhang, Weihao Liu, Jingnan Guo, Mikhail Dobynde, Robert F. Wimmer‐Schweingruber   +4 more
wiley   +1 more source

Diffuse interstellar bands in RAVE survey spectra [PDF]

Astronomy & Astrophysics, 2008
We have used spectra of hot stars from the RAVE Survey in order to investigate the visibility and properties of five diffuse interstellar bands previously reported in the literature. The RAVE spectroscopic survey for Galactic structure and kinematics records CCD spectra covering the 8400-8800 Ang wavelength region at 7500 resolving power.
Boeche, Corrado, Bland-Hawthorn, Joss Bland, Binney, James J., Bienaymé, Olivier, Fiorucci, Massimo A., Munari, Ulisse, Tomasella, Lina, Zwitter, Tomaž, Wyse, Rosemary F G, Williams, Mary E K, Watson, Fred G., Steinmetz, Matthias, Siviero, Alessandro, Siebert, Arnaud, Seabroke, George M., Parker, Quentin A., Navarro, Julio F., Helmi, Amina, Grebel, Eva K., Gilmore, Gerard F., Gibson, Brad K., Freeman, Kenneth C., Campbell, Randy D.   +22 more
openaire   +7 more sources