Predictions for JHK photometry of molecular shocks.

Details Predictions for JHK photometry of molecular shocks. Predictions for JHK photometry of molecular shocks.

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...296..789s&link_type=abstract

Astronomy and Astrophysics, v.296, p.789

Astronomy and Astrophysics

Astrophysics

52

Shock Waves, Ism: Clouds, Ism: Jets And Outflows, Infrared: Interstellar: Lines, Infrared: Stars

Scientific paper

Near-infrared photometry in the J, H and K bands is increasingly employed to identify young stars, still deeply embedded. But when can a star be reliably differentiated from a shock? The infrared colours of molecular shocks are calculated here, summing over the many contributing lines of vibrationally-excited molecular hydrogen, combined with appropriate filters, reddening and fast-shock iron-line emission. Simulated spectral templates are also presented from which H_2_ lines and bands useful as diagnostics are specified. The intrinsic infrared colours of shocks are easily recognised with a particularly faint H-band. Embedded (reddened) shocks, however, possess similar colours to extreme Class I sources. It is concluded that for strong 'infrared-excess' sources the colour-colour diagram alone does not provide sufficient information to exclude a shock.

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