Optical and near-infrared observations of S 140N

Details Optical and near-infrared observations of S 140N Optical and near-infrared observations of S 140N

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106..613e&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 106, no. 2, p. 613-617, 824.

Astronomy and Astrophysics

Astronomy

8

Herbig-Haro Objects, Infrared Astronomy, Molecular Clouds, Polarimetry, Star Formation, Stellar Mass, Carbon Monoxide, Charge Coupled Devices, Pre-Main Sequence Stars, Stellar Winds

Scientific paper

Optical CCD images and polarimetry as well as near-IR observations of the molecular core S 140N are presented. The images reveal a reflection nebulosity associated with the young IRAS source 22178 + 6317. Two pointlike sources are embedded in the reflection nebulosity. The near-IR colors indicate an IR excess characteristic of PMS objects. The CO outflow detected in the region is likely to be driven by these young objects. Four Herbig-Haro objects are detected in our images. This is the first detection of these kinds of objects in the S 140 molecular cloud. The HH objects are aligned in a scale of about 2.3 arcmin (about 0.7 pc) and point to a faint star, located at the northern end of the brighter HH object. This star is therefore a suitable candidate to excite the HH objects and is likely to be a T Tauri-like star. In addition, the star is centered on a previously detected ammonia core and likely heats the high density gas. Finally, these data show that not only high-mass stars, but also low-mass stars have recently formed in the S 140 molecular cloud.

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