Unusual infrared emission toward Sgr B2: possible planar C24
نویسندگان
چکیده
منابع مشابه
Far-infrared Detection of H2d + toward Sgr B2 1
We report on the first far–IR detection of H 2 D + , using the Infrared Space Observatory, in the line of sight toward Sgr B2 in the galactic center. The transition at λ=126.853 µm connecting the ground level of o-H 2 D + , 1 1,1 , with the the 2 1,2 level at 113 K, is observed in absorption against the continuum emission of the cold dust of the source. The line is broad, with a total absorptio...
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The Sgr B2 giant molecular cloud is claimed to be an ”X–ray reflection nebula” – the reprocessing site of a powerful flare of the Sgr A* source, occurred few hundred years ago. The shape of the X–ray spectrum and the strength of the iron fluorescent line support this hypothesis. We argue that the most clean test of the origin of X–rays from Sgr B2 would be a detection of polarized emission from...
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Planar array infrared spectroscopy (PA-IR) is shown to be a powerful new approach to infrared emission spectroscopy (IRES). A proof-of-concept study of selected polymers indicates that PA-IRES allows acquisition of emission spectra with a high signal-to-noise ratio at temperatures as low as 80 degrees C. It is shown that a time resolution below 20 ms is readily achievable for time-resolved char...
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We present Infrared Space Observatory (ISO) observations of OH and OH toward Sgr B2 with a spectral resolution of ∼35 km s. The OH J=5/2→3/2 and J=3/2→1/2 rotational lines of the 2Π1/2 ladder are seen in emission while the cross-ladder transitions (from the 2Π3/2 J=3/2 to the J=1/2, 3/2 and 5/2 levels of the 2Π1/2 ladder), and the 2Π3/2 J=5/2←3/2 and J=7/2←5/2 lines are detected in absorption. ...
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Aims. A small error was recently found in the program used to compute the integrated intensities in the article Belloche et al. (2008, A&A, 482, 179). Methods. We provide new versions of Fig. 2 and Tables 3, 5, and 7 with the correct integrated intensities. Results. The conclusions drawn by Belloche et al. (2008) are not significantly affected by these corrections. Only the mass, density, and c...
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ژورنال
عنوان ژورنال: Research in Astronomy and Astrophysics
سال: 2019
ISSN: 1674-4527,2397-6209
DOI: 10.1088/1674-4527/19/10/141