Open AccessFurther observations of IRAS 04302+2247
Author(s) -
Lucas P. W.,
Roche P. F.
Publication year - 1998
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1998.01798.x
Subject(s) - physics , outflow , astrophysics , photometry (optics) , maser , wavelength , astronomy , infrared , asymmetry , extinction (optical mineralogy) , high resolution , optics , remote sensing , stars , meteorology , quantum mechanics , geology
We present near‐infrared broad‐band and H 2 images of the quadrupolar source IRAS 04302+2247. High‐resolution data at 3.8 μm show that the circumstellar envelope has a high degree of axisymmetry: the asymmetry at shorter wavelengths is almost certainly the result of extinction by dust in the cavity. Photometry of the flux peaks confirms that the source is variable but little change in appearance is observed between 1995 November and 1997 September. We report the first clear detection of the molecular outflow in H 2 at 2.1 μm, revealing discrete streams which are inclined to the axis of the cavity. The motion of knots in the outflow remains the most likely cause of the variability.