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ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Deriving Inclination Angle and Velocity of the Protostellar Jets from Their SiO Knots
- Source :
- The Astrophysical Journal Letters. 931:L5
- Publication Year :
- 2022
- Publisher :
- American Astronomical Society, 2022.
-
Abstract
- We have selected six sources (G209.55–19.68S2, G205.46–14.56S1-A, G203.21–11.20W2, G191.90–11.21S, G205.46–14.56S3, and G206.93–16.61W2) from the Atacama Large Millimeter/submillimeter Array Survey of Orion Planck Galactic Cold Clumps (ALMASOP), in which these sources have been mapped in the CO (J = 2−1), SiO (J = 5−4), and C18O (J = 2−1) lines. These sources have high-velocity SiO jets surrounded by low-velocity CO outflows. The SiO jets consist of a chain of knots. These knots have been thought to be produced by semiperiodic variations in jet velocity. Therefore, we adopt a shock-forming model, which uses such variations to estimate the inclination angle and velocity of the jets. We also derive the inclination angle of the CO outflows using the wide-angle wind-driven shell model and find it to be broadly consistent with that of the associated SiO jets. In addition, we apply this shock-forming model to another three protostellar sources with SiO jets in the literature—HH 211, HH 212, and L1448C(N)—and find that their inclination angle and jet velocity are consistent with those previously estimated from proper-motion and radial-velocity studies.
- Subjects :
- Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
Astrophysics::High Energy Astrophysical Phenomena
Astrophysics of Galaxies (astro-ph.GA)
Astrophysics::Solar and Stellar Astrophysics
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics - Astrophysics of Galaxies
Astrophysics::Galaxy Astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Subjects
Details
- ISSN :
- 20418213 and 20418205
- Volume :
- 931
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal Letters
- Accession number :
- edsair.doi.dedup.....0f71d0647f79a201201c21e73942dc34