Results 21 to 30 of about 678,354 (195)
Electronic spectroscopy of cold cations in a 22-pole trap by indirect methods [PDF]
, 2013 The confining capabilities of a 22-pole ion trap have been employed to mea- sure electronic spectra of cations of astrophysical relevance. The ion trap sits on the head of a closed cycle cryostat, enabling collisional cooling of the confined ions with
Chakrabarty, Satrajit
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SEARCH FOR SPECTROSCOPIC FAMILIES AMONG DIFFUSE INTERSTELLAR BANDS
Odessa Astronomical Publications, 2010 Diffuse interstellar bands (DIBs) await an explanation for many decades. One expects that significant progress in identification of DIBs’ carriers will be possible when all the known DIBs are divided into families in such a way that only one carrier is ...
B. Wszolek, A. Kuzmicz
doaj +1 more source
Diffuse Interstellar Bands in NGC 1448 [PDF]
Astronomy & Astrophysics, 2004 We present spectroscopic VLT/UVES observations of two emerging supernovae, the Type Ia SN 2001el and the Type II SN 2003hn, in the spiral galaxy NGC 1448. Our high resolution and high signal-to-noise spectra display atomic lines of Ca II, Na I, Ti II and K I in the host galaxy. In the line of sight towards SN 2001el, we also detect over a dozen diffuse
Sollerman, J. +6 more
openaire +5 more sources
Electronic spectroscopy of cold ions in a radio-frequency trap [PDF]
, 2010 The low density of ions in mass spectrometers generally precludes direct absorption measurements. The spectrum of ions can nonetheless be obtained by using resonance two-color photofragmentation or multiphoton photofragmentation techniques.
Rudnev, Vitaly S.
core +1 more source
Fullerenes, PAHs, Amino Acids and High Energy Astrophysics
Acta Polytechnica CTU Proceedings, 2014 We present theoretical, observational and laboratory work on the spectral properties of fullerenes and hydrogenated fullerenes. Fullerenes in its various forms (individual, endohedral, hydrogenated, etc.) can contribute to the UV bump in the extinction ...
Susana Iglesias-Groth
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Chemistry, 2021 Few anions exhibit electronically excited states, and, if they do, the one or two possible excitations typically transpire beyond the visible spectrum into the near-infrared.
Taylor J. Santaloci, Ryan C. Fortenberry
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Joint Modelling of Dust Scattering and Thermal Emission: The Spider Complex
The Astrophysical Journal, 2023 Observations across the electromagnetic spectrum of radiative processes involving interstellar dust—emission, absorption, and scattering—are used to constrain the parameters of dust models and more directly to aid in foreground removal of dust for ...
Jielai Zhang +6 more
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INVESTIGATION OF DIFFUSE INTERSTELLAR BANDS OF ORGANIC MOLECULES IN THE SPECTRA OF CEPHEID STARS
Odessa Astronomical Publications, 2016 We describe an effective method of investigation of the Diffuse Interstellar Bands (DIBs) in the spectra of Cepheid stars. DIBs are believed to originate from the absorption of such carriers as polycyclic aromatic hydrocarbons in the interstellar gaseous
S. V. Kashuba +5 more
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The Astrophysical Journal Letters, 2023 We compare mid-infrared (mid-IR), extinction-corrected H α , and CO (2–1) emission at 70–160 pc resolution in the first four PHANGS–JWST targets. We report correlation strengths, intensity ratios, and power-law fits relating emission in JWST’s F770W ...
Adam K. Leroy +50 more
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Detection of diffuse interstellar bands in M 31 [PDF]
Astronomy & Astrophysics, 2008 We investigate the diffuse interstellar band (DIB) spectrum in the interstellar medium of M31. The DEIMOS spectrograph of the W. M. Keck observatory was used to make optical spectroscopic observations of two supergiant stars, MAG 63885 and MAG 70817, in the vicinity of the OB78 association in M31 where the metallicity is approximately equal to solar ...
Cordiner, M. A. +7 more
openaire +2 more sources