High Resolution H alpha Images of the Binary Low-mass Proplyd LV 1 with the Magellan AO System

Abstract

We utilize the new Magellan adaptive optics system (MagAO) to image the binary proplyd LV 1 in the Orion Trapezium at H alpha. This is among the first AO results in visible wavelengths. The H alpha image clearly shows the ionization fronts, the interproplyd shell, and the cometary tails. Our astrometric measurements find no significant relative motion between components over ~18 yr, implying that LV 1 is a low-mass system. We also analyze Large Binocular Telescope AO observations, and find a point source which may be the embedded protostar's photosphere in the continuum. Converting the H magnitudes to mass, we show that the LV 1 binary may consist of one very-low-mass star with a likely brown dwarf secondary, or even plausibly a double brown dwarf. Finally, the magnetopause of the minor proplyd is estimated to have a radius of 110 AU, consistent with the location of the bow shock seen in H alpha.

12 pages, 3 figures. Published in Astrophysical Journal

References in corpus (9)

• The distance to the Orion Nebula
• Protoplanetary Disk Structures in Ophiuchus
• Magnetic Fields in the Formation of Sun-Like Stars
• Mean-Field Magnetohydrodynamics of Accretion Disks
• A new probe of magnetic fields during high-mass star formation: Zeeman splitting of 6.7 GHz methanol masers
• Self-regulated gravitational accretion in protostellar discs
• High Resolution Images of Orbital Motion in the Orion Trapezium Cluster with the LBT Adaptive Optics System
• First Science Observations with SOFIA/FORCAST: 6 to 37 micron Imaging of the Central Orion Nebula
• Status Update and Closed-Loop Performance of the Magellan Adaptive Optics VisAO Camera

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