Relating jet structure to photometric variability: the Herbig Ae star HD 163296

Autor: C. Werren, Heidi B. Hammel, Jonathan E. Grindlay, Carol A. Grady, Sylvie Cabrit, Arne Henden, David K. Lynch, Michael L. Sitko, Ray W. Russell, K. N. Grankin, P. D. Klaassen, Gijs D. Mulders, I. Mendigutía, A. N. Day, D. M. Huelsman, Linda Podio, Hugues Sana, L. E. Ellerbroek, Lex Kaper, A. de Koter, H. Van Winckel, Catherine Dougados, Francesca Bacciotti, Lori C. Beerman
Přispěvatelé: INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto Nazionale di Astrofisica (INAF), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), European Southern Observatory (ESO), Astronomical Institute Anton Pannekoek (AI PANNEKOEK), University of Amsterdam [Amsterdam] (UvA), Crimean Astrophysical Observatory (CrAO), Instituut voor Sterrenkunde [Leuven], Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Low Energy Astrophysics (API, FNWI), École normale supérieure - Paris (ENS-PSL)
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2014, 563, pp.A87. ⟨10.1051/0004-6361/201323092⟩
Astronomy & Astrophysics, 563. EDP Sciences
Astronomy and Astrophysics-A&A, 2014, 563, pp.A87. ⟨10.1051/0004-6361/201323092⟩
Astronomy & Astrophysics, 563, A87
ISSN: 1432-0746
0004-6361
DOI: 10.1051/0004-6361/201323092⟩
Popis: Herbig Ae/Be stars are intermediate-mass pre-main sequence stars surrounded by circumstellar dust disks. Some are observed to produce jets, whose appearance as a sequence of shock fronts (knots) suggests a past episodic outflow variability. This "jet fossil record" can be used to reconstruct the outflow history. We present the first optical to near-infrared (NIR) VLT/X-shooter spectra of the jet from the Herbig Ae star HD 163296. We determine physical conditions in the knots, as well as their kinematic "launch epochs". Knots are formed simultaneously on either side of the disk, with a regular interval of ~16 yr. The velocity dispersion versus jet velocity and the energy input are comparable in both lobes. However, the mass loss rate, velocity, and shock conditions are asymmetric. We find Mjet/Macc ~ 0.01-0.1, consistent with magneto-centrifugal jet launching models. No evidence for dust is found in the high-velocity jet, suggesting it is launched within the sublimation radius (
20 pages, 11 figures, accepted for publication in Astronomy & Astrophysics
Databáze: OpenAIRE
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