Keck near-infrared observations of the Orion proplyds: initial results

Ralph Y. Shuping; Jennifer Patience; John Bally; Mark Morris; James E. Larkin; Bruce A. Macintosh

doi:10.1117/12.457717

13 February 2003 Keck near-infrared observations of the Orion proplyds: initial results

Ralph Y. Shuping, Jennifer Patience, John Bally, Mark Morris, James E. Larkin, Bruce A. Macintosh

Proceedings Volume 4834, Discoveries and Research Prospects from 6- to 10-Meter-Class Telescopes II; (2003) https://doi.org/10.1117/12.457717
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The Hubble Space Telescope (HST) has produced dramatic images of proto-planetary disks (“proplyds”) surrounding your (<10⁶ year old) stars embedded in the Orion Nebula. The intense UV radiation field of the high-mass Trapezium stars heats the disk surfaces, drives mass-loss, and produces bright ionization fronts. Many disks are seen in silhouette against the nebular background of the Orion Nebula, or against the proplyd’s own ionization front. The sub-arcsecond resolution and light gathering power of the Keck telescopes in the near-IR provide a unique opportunity to study the earliest phases of planetary disk evolution and disk destruction under intense UV radiation fields. We present initial results from observations of a handful of proplyds using KCAM and NIRSPEC, with and without the adaptive optics (AO) system, on Keck II. These data clearly resolve, both spatially and spectrally, ionization fronts, disks, and a microjet. The data are used to constrain mass-loss rates due to photoevaporation, disk surface wind velocity, and grain size distribution.

Citation Download Citation

Ralph Y. Shuping, Jennifer Patience, John Bally, Mark Morris, James E. Larkin, and Bruce A. Macintosh "Keck near-infrared observations of the Orion proplyds: initial results", Proc. SPIE 4834, Discoveries and Research Prospects from 6- to 10-Meter-Class Telescopes II, (13 February 2003); https://doi.org/10.1117/12.457717

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