Survey of Orion Disks with ALMA (SODA) III: Disks in wide binary systems in L1641 and L1647

Author(s)

Giulia Ricciardi, Sierk E. van Terwisga, Veronica Roccatagliata, Alvaro Hacar, Thomas Henning, Walter Del Pozzo

Abstract

Aims. The goal of this work is to comprehensively characterize the

impact of stellar multiplicity on Class II disks in the L1641 and L1647

regions of Orion A (~1-3 Myr), part of the Survey of Orion Disks with

ALMA (SODA). We characterize the protostellar multiplicity using the

Atacama Large Millimeter/submillimeter Array (ALMA), the ESO-VISTA, and

Hubble Space telescopes. The resulting sample of 65 multiple systems

represents the largest catalogue of wide binary systems to date

(projected separation >1000 AU), allowing a more robust statistical

characterization of the evolution and properties of protoplanetary

disks. Methods. The disk population was observed in continuum with ALMA

at 225 GHz, with a median rms of 1.5 Mearth. Combining these data

(resolution ~1.1arcsec ) with the ESO-VISTA near-infrared survey of the

Orion A cloud (resolution ~0.7arcsec ), multiple systems are assembled

and selected by an iterative inside-out search in projected separation

(>1000 AU). Results. We identify 61 binary systems, 3 triple systems,

and one quadruple system. The separation range is between 1000 and 10^4

AU. The dust mass distributions inferred with the Kaplan-Meier estimator

yield a median mass of 3.23+0.6-0.4 Mearth for primary disks and

3.88+0.3-0.3 Mearth for secondary disks.

Organisation(s)

Department of Astrophysics

Journal

Astronomy & Astrophysics

ISSN

0004-6361

Publication date

09-2024

Peer reviewed

Yes

Austrian Fields of Science 2012

103003 Astronomy, 103004 Astrophysics

Keywords

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