Skip to main content

Multiwavelength spectroscopy of the bipolar outflow from Cepheus E 1

Smith, M.D., Froebrich, D., Eisloffel, J. (2003) Multiwavelength spectroscopy of the bipolar outflow from Cepheus E 1. Astrophysical Journal, 592 (1 I). pp. 245-254. ISSN 0004 637X. (doi:10.1086/375687) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1086/375687

Abstract

Cepheus E is the site of an exceptional example of a protostellar outflow with a very young dynamical age and extremely high near-infrared luminosity. We combine molecular spectroscopic data from the submillimeter to the near-infrared in order to interpret the rotational excitation of CO and the rovibrational excitation of H2. We conclude that C-type shocks with a paraboloidal bow shock geometry can simultaneously explain all the molecular excitations. Extinction accounts for the deviation of the column densities from local thermodynamic equilibrium. A difference in the extinction between the red- and blue-shifted outflow lobes may account for the measured flux difference. The outflow is deeply embedded in a clump of density 105 cm -3, yet a good fraction of atomic hydrogen, about 40%, is required to explain the excitation and statistical equilibrium. We propose that this atomic component arises, self-consistently, from the dissociated gas at the apex of the leading bow shocks and the relatively long molecule reformation time. At least 20 bow shocks are required in each lobe, although these may be subdivided into smaller bows and turbulent shocked regions. The total outflow mechanical power and cooling amounts to over 30 Lâ??, almost half the source's bolometric luminosity. Nevertheless, only about 6% of the clump mass has been set in outward motion by the outflow, allowing a collapse to continue.

Item Type: Article
DOI/Identification number: 10.1086/375687
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Astrophys. J. [Field not mapped to EPrints] AD - Armagh Observatory, College Hill, Armagh BT61 9DG, Ireland [Field not mapped to EPrints] AD - Thuringer L. Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: ISM: jets and outflows, ISM: kinematics and dynamics, ISM: molecules molecular processes, Shock waves, Stars: mass loss
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Giles Tarver
Date Deposited: 21 Jul 2015 10:25 UTC
Last Modified: 29 May 2019 14:52 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49585 (The current URI for this page, for reference purposes)
  • Depositors only (login required):