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Misalignment of Outflow Axes in the Proto-Multiple Systems in Perseus

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arxiv 1602.07397 v2 pith:LGGPQ3ZI submitted 2016-02-24 astro-ph.SR astro-ph.GA

Misalignment of Outflow Axes in the Proto-Multiple Systems in Perseus

Katherine I. Lee , Michael M. Dunham , Philip C. Myers , Hector G. Arce , Tyler L. Bourke , Alyssa A. Goodman , Jes K. Jorgensen , Lars E. Kristensen
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Stella S. R. Offner Jaime E. Pineda John J. Tobin Eduard I. Vorobyov
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keywords systemsoutflowangularaxesbinaryclouddistributionmomentum
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We investigate the alignment between outflow axes in nine of the youngest binary/multiple systems in the Perseus Molecular Cloud. These systems have typical member spacing larger than 1000 AU. For outflow identification, we use 12CO(2-1) and 12CO(3-2) data from a large survey with the Sub- millimeter Array: Mass Assembly of Stellar Systems and their Evolution with the SMA (MASSES). The distribution of outflow orientations in the binary pairs is consistent with random or preferentially anti-aligned distributions, demonstrating that these outflows are misaligned. This result suggests that these systems are possibly formed in environments where the distribution of angular momentum is complex and disordered, and these systems do not come from the same co-rotating structures or from an initial cloud with aligned vectors of angular momentum.

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  1. Preferential alignment of Class 0, Class I protostellar disks in multiple systems across nine nearby molecular clouds

    astro-ph.SR 2026-07 conditional novelty 6.0

    Disks around young stars in binary and higher-order multiple systems are preferentially aligned out to 6000 AU, implying turbulent fragmentation alone cannot explain how most multiples form.