Results 61 to 70 of about 678,354 (195)

Electronic Spectroscopy of C60+ and Its Analogs C60H2O+, C60H+, C60D+, and C60Mg+

The Astrophysical Journal
The fullerenes C _60 and C _70 have been detected in various interstellar environments, and the cation ${{{\rm{C}}}_{60}}^{+}$ has been identified as a carrier of at least four of the diffuse interstellar bands (DIBs). Based on the presence of fullerenes
Lisa Ganner, Gabriel Schöpfer, Alexander Ebenbichler, Stefan Bergmeister, Milan Ončák, Helgi Rafn Hrodmarsson, Elisabeth Gruber   +6 more
doaj   +1 more source

Optical Spectroscopy of a post-AGB star HD 187885

Open Astronomy, 2013
The physical parameters of the atmosphere and its chemical composition for a post-AGB star HD 187885 are determined from high resolution spectra. The effective temperature Teff = 8000 ± 200 K and the surface gravity log g = 1.0 ± 0.3 were derived.
Kipper Tõnu
doaj   +1 more source

Negotiating in a Foreign Land: Understanding the Curious Interactions Between Intracellular Mitochondria and Internalized Nanoparticles

Advanced Materials Interfaces, Volume 13, Issue 16, 18 August 2026.
Therapeutic nano‐drug delivery systems interact with cellular mitochondria in a multitude of ways. While the complexity of such interactions disrupts the mitochondrial electron transport chain and increases reactive oxygen species production, thereby contributing to nanoparticle toxicity, they also present unique theranostic opportunities in diseases ...
Sourav Bhattacharjee
wiley   +1 more source

Diffuse interstellar bands in the lab [PDF]

Science, 2015
Astrochemistry The diffuse interstellar bands (DIBs) are a set of hundreds of broad optical/near-infrared absorption features seen throughout the interstellar medium. Despite the first DIBs being discovered as long ago as 1922, none of the bands has ever been convincingly identified with a particular chemical species. Now Campbell et al.
openaire   +1 more source

An Instrument for Isomer‐Specific Action Spectroscopy of Charged Clusters: Electronic Spectra of C 14 + and Ca@C 60 +

Chemistry–Methods, Volume 6, Issue 8, August 2026.
Disentangling spectral congestion of a mixture of isomers in gas‐phase spectroscopy is critical. We present an instrument combining ion mobility, mass spectrometry, and spectroscopy in a cryogenic 3D Paul trap to investigate the isomer‐specific charged clusters and illustrate its performance with the electronic spectra of C14+ and Ca@C60+. Interpreting
Corentin Rossi, Anne P. Rasmussen, Zekai Li, Uma Namangalam, Bérenger Gans, Juraj Jašík, Jan Žabka, Hugo Bauduin, Christophe Charrière, Vira Davouloury, Jean‐Philippe Dugal, Jérome Guigand, Catherine Le Bris, Ugo Jacovella   +13 more
wiley   +1 more source

Correlations between Dust Extinction Features across All Wavelength Scales: From Diffuse Interstellar Bands to R(V)

The Astrophysical Journal
Understanding variations in the dust extinction curve is imperative for using dust as a tracer of local structure in the interstellar medium, understanding dust chemistry, and performing extinction corrections.
Andrew K. Saydjari, Gregory M. Green
doaj   +1 more source

MAPPING THE INTERSTELLAR MEDIUM WITH NEAR-INFRARED DIFFUSE INTERSTELLAR BANDS [PDF]

The Astrophysical Journal, 2014
accepted to ApJ, 16 pages, 12 ...
G. Zasowski, B. Ménard, D. Bizyaev, D. A. García-Hernández, A. E. García Pérez, M. R. Hayden, J. Holtzman, J. A. Johnson, K. Kinemuchi, S. R. Majewski, D. L. Nidever, M. Shetrone, J. C. Wilson   +12 more
openaire   +3 more sources

Near‐Earth Cosmic Ray Modulation Index ϕ and Neutron Monitor Cutoff Rigidities at Hourly Cadence: Toward an Improved Monitoring of Solar‐Terrestrial Radiation Environment, Space Weather, and Space Climate

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Cosmic rays (CRs) are energetic particles originating from galactic and extragalactic sources. When arriving into the solar system and the Sun's heliosphere, they are diverted and modulated by the magnetic activity of the Sun. This modulation can be quantified by the modulation parameter ϕ $\phi $ determined with the Force‐field approximation (
Pauli Väisänen, Nicholas Larsen, Sergey Koldobskiy, Markus Similä, David Pelosi, Miguel Orcinha   +5 more
wiley   +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

Evaluating maturity of organic matter in hydrated C1 and CM‐like clasts and a dehydrated clast within a polymict eucrite and a howardite

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1965-1993, August 2026.
Abstract Volatile‐rich xenolithic clasts in different types of brecciated meteorites represent unique pristine solar system material. This study investigates the maturity and thermal history of organic matter using Raman spectroscopy and aqueous alteration effects using infrared spectroscopy in the matrix of 15 volatile‐rich clasts (C1 and CM‐like ...
Swarna Prava Das, Alessandro Maturilli, Aurélie Van den Neucker, Markus Patzek, Dipak Kumar Panda, Gopal K. Pradhan, Guneshwar Thangjam, Surya Snata Rout   +7 more
wiley   +1 more source