Mathematics – Logic
Scientific paper
Aug 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999acasn..40..235y&link_type=abstract
Acta Astron. Sin., Vol. 40, No. 3, p. 235 - 246
Mathematics
Logic
1
Herbig-Haro Objects: Infrared Imaging, Star Formation: Herbig-Haro Objects, Star Formation: Molecular Outflows, Molecular Clouds: Infrared Sources
Scientific paper
The authors report the discovery of 12 HH-like objects in the molecular outflow source L1211. The infrared images in the JHK' broad-bands and H2 υ = 1-0 S(1) narrow-band are obtained over a ≡4' field in the region. Many infrared sources are detected to be physically associated with the dense molecular cloud, and among them, more than 20 sources exhibit infrared excesses typical of T Tauri stars, Herbig Ae/Be stars and protostars. The IRAS source in the region has not been detected, so probably it is more deeply embedded in the dense cloud. Comparison of visual extinction estimated by the near infrared images with that estimated by mm-wave observations suggests that the whole cluster of embedded stars could not be revealed in the wavelengths shorter than 2 μm. The morphological distribution of the HH-like objects and the properties of infrared sources allow to identify their exciting sources. The results show that multiple outflows currently occur inside the L1211 dense cloud.
Chen Yafeng
Ishii Makoto
Nagata Takahiro
Sato Sasumu
Yang Ji
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