ON THE NATURE OF CLASS-I SOURCES IN RHO-OPHIUCHUS

被引：1
作者：
CECCARELLI, C
GRIFFIN, M
ANDRE, P
SARACENO, P
MOLINARI, S
RUSSELL, S
机构：
[1] QUEEN MARY & WESTFIELD COLL,LONDON,ENGLAND
[2] NASA,AMES RES CTR,MOFFETT FIELD,CA 94035
[3] CENS,F-91190 GIF SUR YVETTE,FRANCE
[4] DUBLIN INST ADV STUDIES,DUBLIN 4,IRELAND
来源：
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-GEOPHYSICS AND SPACE PHYSICS | 1993年 / 16卷 / 05期
关键词：
Other objects and background radiations of unknown origin or distances;
D O I：
10.1007/BF02512040
中图分类号：
学科分类号：
摘要：
We present nun broad-band photometry of class-I sources in rho Ophiuchus that do not show signs of outflow activity. These sources have been considered as probable protostellar candidates, since they are among the most luminous members (few tens of solar luminosities) of this star-forming region and are heavily embedded, as shown by their steeply increasing spectra toward longer wavelengths. In comparison to some famous low-luminosity outflow (OF) sources, the non-outflow (NOF) sources show lower 1.3 mm fluxes, raising doubts as to their evolutionary stage. Our nun/submm data enabled us to derive the dust temperature and opacity power law exponent beta. From these we derive strong constraints on the mass surrounding these objects and conclude that NOF class-I sources in rho Ophiuchus have much less mass than OF sources with similar luminosities. We discuss the implications of such a finding in the evolutionary scenario of a young star.
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页码：597 / 603
页数：7
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