SIMBAD references

1999A&A...344L...9N - Astronomy and Astrophysics, volume 344L9-12 (1999/4-1)

Shocked molecular hydrogen from RNO 91.

NANDA KUMAR M.S., ANANDARAO B.G. and DAVIS C.J.

Abstract (from CDS):

We report the detection of the H2 v=1-0 S(1) line at 2.122µm, from RNO 91 in the L43 dark cloud, which is known to be a T Tauri star surrounded by a 1700AU disk structure (containing ices) and a weak outflow. The non-detection of the H2 v=2-1 S(1) line at 2.247µm suggests shock excitation rather than fluorescence. The emission is extended spatially up to 9" in the north-south direction. The line intensity peak (FWHM∼3") corresponds to the star RNO 91 which is embedded in a cocoon of gas and dust. The observed H2 emission from this cocoon may be attributed to embedded Herbig-Haro like knots. The H2 line flux in the central 2"x3" is estimated to be 7x10–14ergs/s/cm2, which indicates a mass flow rate of 4x10–8M☉/yr. Furthermore, narrow band image taken through H2 1-0 S(1) filter is presented, which reveal a tilted disk and bipolar outflow structure that agrees with earlier observations and models. We show that this disk/outflow system is a unique case.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: pre-main sequence - ISM: Herbig-Haro objects - ISM: jets and outflows - infrared: stars - accretion, accretion disks

Simbad objects: 2

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