LWS observations of the protostar IRAS16293-2422

Ceccarelli, C.; Caux, E.; White, G. J.; Molinari, S.; Furniss, I.; Liseau, R.; Nisini, B.; Saraceno, P.; Spinoglio, L. and Wolfire, M. (1998). LWS observations of the protostar IRAS16293-2422. In: Star Formation with the Infrared Space Observatory, 24-26 June 1997, Lisbon, Portugal.

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Abstract

We report ISO-LWS observations toward the low mass star IRAS16293-2422 between 43µm - 197µm. The CO, H₂O and OH rotational lines and the OI(63µm) fine-structure line dominate the spectrum. Combining the CO J_up=14 to 25 observations with previous J_up=6 measurements, we derive stringent limits on the density (~3 · 10⁴cm^-3), temperature (~1500 K), and column density (~1.5 · 10²⁰cm^-2) of the emitting gas. We show that this warm gas is associated with the outflow and that a low velocity, C-type shock can account for the characteristics of the CO spectrum. The H₂O and OH abundances derived from the observed line fluxes are [H₂O] / [H₂] ~2 · 10^-5 and [OH] / [H₂] ~5 · 10^-6 respectively. Finally, we speculate that the OI(63µm) line emission originates in the collapsing envelope that surrounds the central object.

Item Type:	Conference Item
Copyright Holders:	1997 Astronomical Society of the Pacific
Extra Information:	Star Formation with the Infrared Space Observatory ASP Conference Series, Vol.132, 1998 J. L. Yun, and R. Liseau, eds. ISBN: 1-886733-52-X eISBN: 978-1-58381-468-0 pp. 243-248
Academic Unit/Department:	Science > Physical Sciences
Interdisciplinary Research Centre:	Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Related URLs:	http://cdsads.u-strasbg.fr/abs/1998ASPC....(Other) http://adsabs.harvard.edu/abs/1998ASPC.....(Other)
Item ID:	32675
Depositing User:	Glenn White
Date Deposited:	16 Mar 2012 09:43
Last Modified:	16 May 2012 20:39
URI:	http://oro.open.ac.uk/id/eprint/32675

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