dc.contributor.author | Fuente, D. de la | |
dc.contributor.author | Najarro, F. | |
dc.contributor.author | Borissova, J. | |
dc.contributor.author | Alegría, S. Ramírez | |
dc.contributor.author | Hanson, M. M. | |
dc.contributor.author | Trombley, C. | |
dc.contributor.author | Figer, D. F. | |
dc.contributor.author | Davies, B. | |
dc.contributor.author | Garcia, M. | |
dc.contributor.author | Kurtev, R. | |
dc.contributor.author | Urbaneja, M. A. | |
dc.contributor.author | Smith, L. C. | |
dc.contributor.author | Lucas, P. W. | |
dc.contributor.author | Herrero, A. | |
dc.date.accessioned | 2017-06-27T12:58:59Z | |
dc.date.available | 2017-06-27T12:58:59Z | |
dc.date.issued | 2016-05-01 | |
dc.identifier.citation | Fuente , D D L , Najarro , F , Borissova , J , Alegría , S R , Hanson , M M , Trombley , C , Figer , D F , Davies , B , Garcia , M , Kurtev , R , Urbaneja , M A , Smith , L C , Lucas , P W & Herrero , A 2016 , ' Probing the Dragonfish star-forming complex: the ionizing population of the young massive cluster Mercer 30 ' , Astronomy & Astrophysics , vol. 589 , A69 . https://doi.org/10.1051/0004-6361/201528004 | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1602.02503v2 | |
dc.identifier.other | ORCID: /0000-0002-8872-4462/work/62748922 | |
dc.identifier.uri | http://hdl.handle.net/2299/18573 | |
dc.description | This document is the accepted manuscript version of the following article: D. De la Fuente, et al, “Probing the Dragonfish star-forming complex: the ionizing population of the young massive cluster Mercer 30”, Astronomy and Astrophysics, Vol. 589, A69, May 2016. The Version of record is available online at DOI: 10.1051/0004-6361/201528004 | |
dc.description.abstract | The Dragonfish Nebula has been recently claimed to be powered by a superluminous but elusive OB association. Instead, systematic searches in near-infrared photometric surveys have found many other cluster candidates on this sky region. Among these, the first confirmed young massive cluster was Mercer 30, where Wolf-Rayet stars were found. We perform a new characterization of Mercer 30 with unprecedented accuracy, combining NICMOS/HST and VVV photometric data with multi-epoch ISAAC/VLT H- and K-band spectra. Stellar parameters for most of spectroscopically observed cluster members are found through precise non-LTE atmosphere modeling with the CMFGEN code. Our spectrophotometric study for this cluster yields a new, revised distance of d = (12.4 +- 1.7) kpc and a total of Q = 6.70 x 10^50 Lyman ionizing photons. A cluster age of (4.0 +- 0.8) Myr is found through isochrone fitting, and a total mass of (1.6 +- 0.6) x 10^4 Msol is estimated thanks to our extensive knowledge of the post-main-sequence population. As a consequence, membership of Mercer 30 to the Dragonfish star-forming complex is confirmed, allowing us to use this cluster as a probe for the whole complex, which turns out to be extremely large (400 pc across) and located at the outer edge of the Sagittarius-Carina spiral arm (11 kpc from the Galactic Center). The Dragonfish complex hosts 19 young clusters or cluster candidates (including Mercer 30 and a new candidate presented in this work) and an estimated minimum of 9 field Wolf-Rayet stars. The sum of all these contributions accounts for, at least, 73% of the Dragonfish Nebula ionization and leaves little or no room for the alleged superluminous OB association; alternative explanations are discussed. | en |
dc.format.extent | 23 | |
dc.format.extent | 2667743 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | |
dc.subject | astro-ph.GA | |
dc.subject | astro-ph.SR | |
dc.title | Probing the Dragonfish star-forming complex: : the ionizing population of the young massive cluster Mercer 30 | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1051/0004-6361/201528004 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |