SIMBAD references

2008ApJ...675..454Y - Astrophys. J., 675, 454-463 (2008/March-1)

The CO molecular outflows of IRAS 16293-2422 probed by the submillimeter array.


Abstract (from CDS):

We have mapped the protobinary source IRAS 16293-2422 in CO 2-1, 13CO 2-1, and CO 3-2 with the Submillimeter Array (SMA). The maps with resolution of 1.5"-5" reveal a single small-scale (∼3000 AU) bipolar molecular outflow along the east-west direction. We found that the blueshifted emission of this small-scale outflow mainly extends to the east and the redshifted emission to the west from the position of IRAS 16293A. A comparison with the morphology of the large-scale outflows previously observed by single-dish telescopes at millimeter wavelengths suggests that the small-scale outflow may be the inner part of the large-scale (∼15,000 AU) east-west outflow. On the other hand, there is no clear counterpart of the large-scale northeast-southwest outflow in our SMA maps. Comparing analytical models to the data suggests that the morphology and kinematics of the small-scale outflow can be explained by a wide-angle wind with an inclination angle of ∼30°-40° with respect to the plane of the sky. The high-resolution CO maps show that there are two compact, bright spots in the blueshifted velocity range. An LVG analysis shows that the one located 1" to the east of source A is extremely dense, n(H2) ∼107/cm3, and warm, Tkin>55 K. The other one located 1" southeast of source B has a higher temperature of Tkin>65 K but slightly lower density of n(H2) ∼10^ 6^/cm3. It is likely that these bright spots are associated with the hot core-like emission observed toward IRAS 16293. Since both bright spots are blueshifted from the systemic velocity and are offset from the protostellar positions, they are likely formed by shocks.

Abstract Copyright:

Journal keyword(s): ISM: Individual: Alphanumeric: IRAS 16293-2422 - ISM: Jets and Outflows - Stars: Formation

Nomenclature: Fig.2: [YHB2008] IRAS 16293-2422 bN (Nos b1-b2).

Simbad objects: 7

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