PROPER MOTIONS OF YOUNG STELLAR OUTFLOWS IN THE MID-INFRARED WITH SPITZER (IRAC). I. THE NGC 1333 REGION
- Instituto de Ciencias Nucleares, UNAM, Ap. 70-543, 04510 D.F. (Mexico)
- Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States)
- Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125 (United States)
We use two 4.5 {mu}m Spitzer (IRAC) maps of the NGC 1333 region taken over a {approx}7 yr interval to determine proper motions of its associated outflows. This is a first successful attempt at obtaining proper motions of stellars' outflow from Spitzer observations. For the outflow formed by the Herbig-Haro objects HH7, 8, and 10, we find proper motions of {approx}9-13 km s{sup -1}, which are consistent with previously determined optical proper motions of these objects. We determine proper motions for a total of eight outflows, ranging from {approx}10 to 100 km s{sup -1}. The derived proper motions show that out of these eight outflows, three have tangential velocities {<=}20 km s{sup -1}. This result shows that a large fraction of the observed outflows have low intrinsic velocities and that the low proper motions are not merely a projection effect.
- OSTI ID:
- 22089718
- Journal Information:
- Astronomical Journal (New York, N.Y. Online), Vol. 145, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
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