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Intermediate teeth in pulsed jets: A motivation for high-resolution observations

Smith, M.D., Suttner, G., Zinnecker, H. (1997) Intermediate teeth in pulsed jets: A motivation for high-resolution observations. Astronomy and Astrophysics, 320 (1). pp. 325-332. ISSN 0004-6361. (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)
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Abstract

Supersonic jets often contain a series of knots which can be interpreted as arising from a pulsating energy source. The pulsation model is here examined for uniquely-identifying signatures. Formulae are presented for the number, intensity and distribution of knots. Our numerical and analytical calculations confirm that the classical sawtooth velocity structure contains intermediate teeth. The intermediate teeth are shown to possess high-velocity gradients, between 1.6 to 3 times the sawtooth gradient for models ranging between adiabatic and isothermal. Both sets of teeth weaken with distance with only positive gradients allowed. The leading shock of one pulse can catch up with the reflected shock of the pulse ahead. Then, the intermediate teeth form a new weaker sawtooth structure, with about half the original jump, upon which new teeth are weaned. This gives rise to a relatively long-period beat-type pattern. The associated velocity and spatial structures should soon be observable in protostellar jets.

Item Type: Article
Uncontrolled keywords: Galaxies: jets, Hydrodynamics, ISM: jets and outflows, Shock waves
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: 11 Aug 2015 10:35 UTC
Last Modified: 29 May 2019 15:55 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50153 (The current URI for this page, for reference purposes)
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