Accretion and Outflow in Orion-KL Source I

Melvyn Wright; Brett A. McGuire; Adam Ginsburg; Tomoya Hirota; John Bally; Ryan Hwangbo; T. Dex Bhadra; Chris John; Rishabh Dave

doi:10.3847/1538-4357/ad7026

The Astrophysical Journal (Jan 2024)

Accretion and Outflow in Orion-KL Source I

Melvyn Wright,
Brett A. McGuire,
Adam Ginsburg,
Tomoya Hirota,
John Bally,
Ryan Hwangbo,
T. Dex Bhadra,
Chris John,
Rishabh Dave

Affiliations

Melvyn Wright: Department of Astronomy, University of California , 501 Campbell Hall, Berkeley, CA 94720-3441, USA ; [email protected]
Brett A. McGuire: ORCiD; Department of Chemistry, Massachusetts Institute of Technology , Cambridge, MA 02139, USA; National Radio Astronomy Observatory , Charlottesville, VA 22903, USA
Adam Ginsburg: ORCiD; Department of Astronomy, University of Florida , 211 Bryant Space Science Center P.O. Box 112055, Gainesville, FL 32611-2055, USA
Tomoya Hirota: Mizusawa VLBI Observatory, National Astronomical Observatory of Japan , 2-12, Hoshigaoka, Mizusawa, Oshu, Iwate 023-0861, Japan; The Graduate University for Advanced Studies , SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
John Bally: CASA, University of Colorado , 389-UCB, Boulder, CO 80309, USA
Ryan Hwangbo: Department of Astronomy, University of California , 501 Campbell Hall, Berkeley, CA 94720-3441, USA ; [email protected]
T. Dex Bhadra: Department of Astronomy, University of California , 501 Campbell Hall, Berkeley, CA 94720-3441, USA ; [email protected]
Chris John: Department of Astronomy, University of California , 501 Campbell Hall, Berkeley, CA 94720-3441, USA ; [email protected]; Troy High School , 2200 Dorothy Lane, Fullerton, CA 92831, USA
Rishabh Dave: Department of Astronomy, University of California , 501 Campbell Hall, Berkeley, CA 94720-3441, USA ; [email protected]

DOI: https://doi.org/10.3847/1538-4357/ad7026
Journal volume & issue: Vol. 974, no. 2
p. 150

Abstract

Read online

We present Atacama Large Millimeter/submillimeter Array observations of SiO, SiS, H _2 O, NaCl, and SO line emission at ∼30–50 mas resolution. These images map the molecular outflow and disk of Orion Source I (SrcI) on ∼12–20 au scales. Our observations show that the flow of material around SrcI creates a turbulent boundary layer in the outflow from SrcI, which may dissipate angular momentum in the rotating molecular outflow into the surrounding medium. Additionally, the data suggest that the proper motion of SrcI may have a significant effect on the structure and evolution of SrcI and its molecular outflow. As the motion of SrcI funnels material between the disk and the outflow, some material may be entrained into the outflow and accrete onto the disk, creating shocks that excite the NaCl close to the disk surface.

Published in The Astrophysical Journal

ISSN: 1538-4357 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Astronomy: Astrophysics
Website: https://iopscience.iop.org/journal/0004-637X

About the journal

Abstract

Keywords