The kinematics of HH 34 from HST images with a nine-year time baseline

• Verfasst von: Raga, Alejandro C. [VerfasserIn]
• Verfasst von: Lora, Verónica [VerfasserIn]
• Titel: The kinematics of HH 34 from HST images with a nine-year time baseline
• Verf.angabe: A.C. Raga, A. Noriega-Crespo, A. Rodríguez-González, V. Lora, K.R. Stapelfeldt, and S.J. Carey
• E-Jahr: 2012
• Jahr: 2012 April 1
• Umfang: 10 S.
• Fussnoten: Gesehen am 22.11.2018
• Titel Quelle: Enthalten in: The astrophysical journal / 1
• Ort Quelle: London : Institute of Physics Publ., 1995
• Jahr Quelle: 2012
• Band/Heft Quelle: 748(2012), 2, Artikel-ID 103
• ISSN Quelle: 1538-4357
• DOI: doi:10.1088/0004-637X/748/2/103
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1584301996

Abstract

We study archival HST [S II ] 6716+30 and Hα images of the HH 34 outflow, taken in 1998.71 and in 2007.83. The 9 yr time baseline and the high angular resolution of these observations allow us to carry out a detailed proper-motion study. We determine the proper motions of the substructure of the HH 34S bow shock (from the [S II ] and Hα frames) and of the aligned knots within 30” from the outflow source (only from the [S II ] frames). We find that the present-day motions of the knots along the HH 34 jet are approximately ballistic, and that these motions directly imply the formation of a major mass concentration in 900 yr, at a position similar to the one of the present-day HH 34S bow shock. In other words, we find that the knots along the HH 34 jet will merge to form a more massive structure, possibly resembling HH 34S.