dc.contributor.author | Hasenberger, Birgit | |
dc.contributor.author | Forbrich, Jan | |
dc.contributor.author | Alves, Joao | |
dc.contributor.author | Wolk, Scott | |
dc.contributor.author | Meingast, Stefan | |
dc.contributor.author | Getman, Konstantin | |
dc.contributor.author | Pillitteri, Ignazio | |
dc.date.accessioned | 2017-05-26T10:26:27Z | |
dc.date.available | 2017-05-26T10:26:27Z | |
dc.date.issued | 2016-08-29 | |
dc.identifier.citation | Hasenberger , B , Forbrich , J , Alves , J , Wolk , S , Meingast , S , Getman , K & Pillitteri , I 2016 , ' Gas absorption and dust extinction towards the Orion Nebula Cluster ' , Astronomy & Astrophysics , vol. 593 , A7 . https://doi.org/10.1051/0004-6361/201628517 | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1606.07065v1 | |
dc.identifier.other | ORCID: /0000-0001-8694-4966/work/62751218 | |
dc.identifier.uri | http://hdl.handle.net/2299/18226 | |
dc.description | B. Hasenberger, et al, 'Gas absorption and dust extinction towards the Orion Nebula Cluster', Astronomy & Astrophysics, 593, A7, 2016. The version of record is available online at DOI: 10.1051/0004-6361/201628517. Published by EDP Sciences. © ESO, 2016 | |
dc.description.abstract | We characterise the relation between the gas and dust content of the interstellar medium towards young stellar objects in the Orion Nebula Cluster. X-ray observations provide estimates of the absorbing equivalent hydrogen column density N_H based on spectral fits. Near-infrared extinction values are calculated from intrinsic and observed colour magnitudes (J-H) and (H-K_s) as given by the VISTA Orion A survey. A linear fit of the correlation between column density and extinction values A_V yields an estimate of the N_H/A_V ratio. We investigate systematic uncertainties of the results by describing and (if possible) quantifying the influence of circumstellar material and the adopted extinction law, X-ray models, and elemental abundances on the N_H/A_V ratio. Assuming a Galactic extinction law with R_V=3.1 and solar abundances by Anders & Grevesse (1989), we deduce an N_H/A_V ratio of (1.39 +- 0.14) x 10^21 cm^-2 mag^-1 for Class III sources in the Orion Nebula Cluster where the given error does not include systematic uncertainties. This ratio is consistent with similar studies in other star-forming regions and approximately 31% lower than the Galactic value. We find no obvious trends in the spatial distribution of N_H/A_V ratios. Changes in the assumed extinction law and elemental abundances are demonstrated to have a relevant impact on deduced A_V and N_H values, respectively. Large systematic uncertainties associated with metal abundances in the Orion Nebula Cluster represent the primary limitation for the deduction of a definitive N_H/A_V ratio and the physical interpretation of these results. | en |
dc.format.extent | 10 | |
dc.format.extent | 662446 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | |
dc.subject | dust | |
dc.subject | extinction | |
dc.subject | X-rays: ISM | |
dc.subject | Infrared: ISM | |
dc.subject | Stars: pre-main sequence | |
dc.title | Gas absorption and dust extinction towards the Orion Nebula Cluster | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1051/0004-6361/201628517 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |