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Astron. Astrophys. 364, 683-688 (2000)

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4. Conclusion

The parent molecular cloud seems to be an active star forming region. We have found a total of 6 prospective Class I type sources in the region including IRAS 05361 +3539. A number of faint Class II type sources are also detected in the region. One of the Class I sources (star no.12) detected close to IRS1 shows extreme reddening in the J-H/H-Ks color-color diagram. This star also appears to be fainter in H and K' band by 1.1 magnitude in the Mt. Abu images when compared with the 2MASS magnitudes. The time difference between these observations was 23 months. Therefore, star # 12 could be a variable protostar of FU Orionis type. We need further observations to prove it.

The infrared spectral index of IRS1 is estimated to be 1.1 from IRAS and NIR fluxes. Our model predicts the possibility of an accretion disk with dust temperatures from 80K to 800K and with an extent of several hundreds of AU. Traces of molecular H2 emissions have been detected along the CO jet axis mapped by Shepherd & Churchwell (1996) in the eastward direction. A nebulosity is also detected towards north extending up to 5" from IRS1. This could be due to either an unresolved star, an UCHII region, or a dense clump of molecular hydrogen.

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© European Southern Observatory (ESO) 2000

Online publication: January 29, 2001