RT Journal Article
T1 The 2011 October Draconids outburst – II. Meteoroid chemical abundances from fireball spectroscopy
A1 Madiedo Gil, José María
A1 Trigo Rodríguez, Josep María
A1 Konovalova, N.
A1 Williams, I. P.
A1 Castro Tirado, Alberto J.
A1 Ortiz Moreno, José Luis
A1 Cabrera Caño, Jesús
AB On October 8, 2011 the Earth crossed dust trails ejected from comet 21P/Giacobini-Zinner in thelate 19th and early 20th Century. This gave rise to an outburst in the activity of the October Draconidmeteor shower, and an international team was organized to analyze this event. The SPanishMeteor Network (SPMN) joined this initiative and recorded the October Draconids by meansof low light level CCD cameras. In addition, spectroscopic observations were carried out. Tensof multi-station meteor trails were recorded, including an extraordinarily bright October Draconidfireball (absolute mag. -10.5) that was simultaneously imaged from three SPMN meteor observingstations located in Andalusia. Its spectrum was obtained, showing a clear evolution in therelative intensity of emission lines as the fireball penetrated deeper into the atmosphere. Here wefocus on the analysis of this remarkable spectrum, but also discuss the atmospheric trajectory,atmospheric penetration, and orbital data computed for this bolide which was probably releasedduring 21P/Giacobini-Zinner return to perihelion in 1907. The spectrum is discussed togetherwith the tensile strength for the October Draconid meteoroids. The chemical profile evolution ofthe main rocky elements for this extremely bright bolide is compared with the elemental abundancesobtained for 5 October Draconid fireballs also recorded during our spectroscopic campaignbut observed only at a single station. Significant chemical heterogeneity between the smallmeteoroids is found as we should expect for cometary aggregates being formed by diverse dustcomponents.
PB Oxford University Press
SN 0035-8711
SN 1365-2966 (electrónico)
YR 2013
FD 2013
LK http://hdl.handle.net/10272/9396
UL http://hdl.handle.net/10272/9396
LA eng
NO Madiedo Gil, J.M., Trigo Rodríguez, J.M., Konovalova, N., Williams, I.P., Castro Tirado, A.J., Ortiz Moreno, J.L., Cabrera Caño, J.: "The 2011 October Draconids outburst – II. Meteoroid chemical abundances from fireball spectroscopy". Monthly Notices of the Royal Astronomical Society. Vol. 433, págs. 571-580, (2013). ISSN 0035-8711
NO We acknowledge support from the Spanish Ministry of Science and Innovation (projects AYA2009-13227, AYA2009-14000-C03-01 and AYA2011-26522), Junta de Andalucia (project P09-FQM-4555) and CSIC (grant # 201050I043).
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026