An optical and infrared study of the region surrounding Herbig-Haro objects 1 and 2

Details An optical and infrared study of the region surrounding Herbig-Haro objects 1 and 2 An optical and infrared study of the region surrounding Herbig-Haro objects 1 and 2

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.2281s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, Nov. 1985, p. 2281-2290. NSF-NASA-supported research.

Other

79

Herbig-Haro Objects, Infrared Spectra, Radio Stars, Stellar Mass Ejection, Stellar Spectrophotometry, Visible Spectrum, Astrometry, Charge Coupled Devices, Linear Polarization, Near Infrared Radiation, Reflection Nebulae, Stellar Magnetic Fields

Scientific paper

Optical and near-infrared observations of the environs of Herbig-Haro objects 1 and 2 provide the basis for identifying a recently discovered radio continuum source as the star responsible for powering the highly collimated mass outflow traced by these H-H objects. Polarimetric observations show that the source (designated VLA 1), located at the midpoint between HH 1 and 2, illuminates a biconical reflection nebula. Surface photometry of the biconical nebula at V,R,I, and K combined with recent far-IR observations of the HH 1,2 region allow VLA 1 to be located in the HR diagram, even though it cannot be seen directly at optical wavelengths: the star falls above the main sequence, in the domain occupied by T Tauri and Herbig emission stars. VLA 1 is probably surrounded by an optically thick disk viewed nearly edge on. An optical "jet" emanates from the vicinity of VLA 1, and is directed along the axis of the putative disk toward HH 1; its spectrum resembles that of HH 1 and other Herbig-Haro objects. Polarimetric observations of nearby stars suggest that the local magnetic field is directed along the axis of HH 1,2 mass outflow.

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