Results 51 to 60 of about 21,871 (195)

Estimating Molecular Gas Content in Galaxies from Polycyclic Aromatic Hydrocarbon Emission

The Astrophysical Journal, 2023
Emission from polycyclic aromatic hydrocarbons (PAHs), a commonly used indicator of star formation activity in galaxies, also has the potential to serve as an effective empirical tracer of molecular gas.
Lulu Zhang, Luis C. Ho
doaj   +1 more source

Centrosymmetric molecules as possible carriers of diffuse interstellar bands

, 2010
In this paper, we present new data with interstellar C2 (Phillips bands A-X), from observations made with the Ultraviolet-Visual Echelle Spectrograph of the European Southern Observatory.
Bakker, Bakker, Ballik, Ballik, Chauville, Crawford, Douay, Douglas, F. A. Musaev, Frisch, G. A. Galazutdinov, Galazutdinov, Galazutdinov, Gredel, Heger, Herbig, Herbig, Hobbs, J. Krełowski, Kaźmierczak, Kaźmierczak, Langhoff, M. Kaźmierczak, M. R. Schmidt, Maier, Marenin, Morton, Sarre, Sonnentrucker, Thorburn, Van Dishoeck, Van Dishoeck, Westerlund, Y. Betelesky, Ádámkovics   +34 more
core   +1 more source

Putting the Diffuse Interstellar Bands on the map - literally!

, 2013
In a quest to further our understanding of the diffuse interstellar medium (ISM) as well as the unidentified carriers of the diffuse interstellar bands (DIBs), we are mapping DIBs across the sky using hundreds of hot stars as background torches ...
van Loon, Jacco Th.
core   +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

Studies of the Diffuse Interstellar Bands. III. HD 183143 [PDF]

, 2009
Echelle spectra of HD 183143 [B7Iae, E(B-V) = 1.27] were obtained on three nights, at a resolving power R = 38,000 and with a signal-to-noise ratio ~1000 at 6400 A in the final, combined spectrum. A catalog is presented of 414 diffuse interstellar bands (
Bishof, M., Friedman, S. D., Hobbs, L. M., McCall, B. J., Oka, T., Rachford, B., Snow, T. P., Sonnentrucker, P., Thorburn, J. A., Welty, D. E., York, D. G.   +10 more
core   +1 more source

Diffuse Interstellar Bands as Probes of Small-Scale Interstellar Structure [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractWe present observations which probe the small-scale structure of the interstellar medium using diffuse interstellar bands (DIBs). Towards HD 168075/6 in the Eagle Nebula, significant differences in DIB absorption are found between the two lines of sight, which are separated by 0.25 pc, and λ 5797 exhibits a velocity shift.
Smith, Keith T., Cordiner, Martin A., Sarre, Peter J.   +2 more
openaire   +2 more sources

Diffuse interstellar bands: A comprehensive laboratory study [PDF]

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2006
As a result of the search for the identity of the chromophores responsible for producing the diffuse interstellar bands, a comprehensive exposition of experimental data is presented, which implicates the following molecules- 1. The extremely stable organic molecules, magnesium tetrabenzoporphyrin (MgTBP) and H2TBP. 2.
openaire   +3 more sources

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

Open problems and perspectives offered by current and future instruments

EPJ Web of Conferences, 2012
We summarize recent observational and theoretical results and discuss the open challenges for astrochemistry and the promises offered by the current and upcoming instruments. Some of the main challenges are listed below. Characterization of the structure
Gérin M.
doaj   +1 more source

Accelerated Discovery‐to‐Unveiling of High‐Performance and Affordable Ammonia Electrode Process by Human–Machine Collaboration Framework

Angewandte Chemie International Edition, EarlyView.
By employing dimensionally reduced reaction descriptors, a human–machine collaboration framework for efficient electrochemical nitrate reduction to NH3 electrocatalysts screening is established and drastically shorten the discovery timeframe. A new kinetic model is established in combination with a rotating ring‐disk electrode, unveiling the pivotal ...
Yingying Cheng, Masaki Takeguchi, Abraham Castro Garcia, Ken Sakaushi   +3 more
wiley   +1 more source