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Article Dans Une Revue The Astrophysical Journal Année : 2022

Dense Molecular Clouds in the Crab Supernova Remnant

Résumé

Molecular emission was imaged with ALMA from numerous components near and within bright H 2-emitting knots and absorbing dust globules in the Crab Nebula. These observations provide a critical test of how energetic photons and particles produced in a young supernova remnant interact with gas, cleanly differentiating between competing models. The four fields targeted show contrasting properties but within them, seventeen distinct molecular clouds are identified with CO emission; a few also show emission from HCO + , SiO, and/or SO. These observations are compared with Cloudy models of these knots. It has been suggested that the Crab filaments present an exotic environment in which H 2 emission comes from a mostly neutral zone probably heated by cosmic rays produced in the supernova surrounding a cool core of molecular gas. Our model is consistent with the observed CO J = 3 − 2 line strength. These molecular line emitting knots in the Crab Nebula present a novel phase of the ISM representative of many important astrophysical environments.
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Origine : Publication financée par une institution

Dates et versions

hal-03549584 , version 1 (31-01-2022)

Identifiants

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Alwyn Wootten, Rory O Bentley, J. Baldwin, F. Combes, A. C Fabian, et al.. Dense Molecular Clouds in the Crab Supernova Remnant. The Astrophysical Journal, 2022, 925 (1), pp.59. ⟨10.3847/1538-4357/ac391a⟩. ⟨hal-03549584⟩
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