Molecular outflows in starburst nuclei

Roy, Arpita and Nath, Biman B and Sharma, Prateek and Shchekinov, Yuri (2016) Molecular outflows in starburst nuclei. In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 463 (3). pp. 2296-2309.

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Abstract

Recent observations have detected molecular outflows in a few nearby starburst nuclei. We discuss the physical processes at work in such an environment in order to outline a scenario that can explain the observed parameters of the phenomenon, such as the molecular mass, speed and size of the outflows. We show that outflows triggered by OB associations, with N-OB >= 10(5) (corresponding to a star formation rate (SFR)>= 1 M-circle dot yr(-1) in the nuclear region), in a stratified disc with mid-plane density n(0) similar to 200-1000 cm(-3) and scaleheight z(0) >= 200(n(0)/10(2) cm (3)) (3/5) pc, can form molecules in a cool dense and expanding shell. The associated molecular mass is >= 10(7) M-circle dot at a distance of a few hundred pc, with a speed of several tens of km s(-1). We show that an SFR surface density of 10 <= Sigma(SFR) <= 50 M-circle dot yr(-1) kpc(-2) favours the production of molecular outflows, consistent with observed values.

Item Type:	Journal Article
Publication:	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Publisher:	OXFORD UNIV PRESS, GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
Additional Information:	Copy right for this article belongs to the OXFORD UNIV PRESS, GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
Department/Centre:	Division of Physical & Mathematical Sciences > Joint Astronomy Programme Division of Physical & Mathematical Sciences > Physics
Date Deposited:	21 Mar 2017 09:44
Last Modified:	21 Mar 2017 09:44
URI:	http://eprints.iisc.ac.in/id/eprint/56415

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