SIMBAD references

2016ApJS..226....8K - Astrophys. J., Suppl. Ser., 226, 8-8 (2016/September-0)

The Spitzer infrared spectrograph survey of protoplanetary disks in Orion A. I. Disk properties.

KIM K.H., WATSON D.M., MANOJ P., FORREST W.J., FURLAN E., NAJITA J., SARGENT B., HERNANDEZ J., CALVET N., ADAME L., ESPAILLAT C., MEGEATH S.T., MUZEROLLE J. and McCLURE M.K.

Abstract (from CDS):

We present our investigation of 319 Class II objects in Orion A observed by Spitzer/IRS. We also present the follow-up observations of 120 of these Class II objects in Orion A from the Infrared Telescope Facility/SpeX. We measure continuum spectral indices, equivalent widths, and integrated fluxes that pertain to disk structure and dust composition from IRS spectra of Class II objects in Orion A. We estimate mass accretion rates using hydrogen recombination lines in the SpeX spectra of our targets. Utilizing these properties, we compare the distributions of the disk and dust properties of Orion A disks with those of Taurus disks with respect to position within Orion A (Orion Nebular Cluster [ONC] and L1641) and with the subgroups by the inferred radial structures, such as transitional disks (TDs) versus radially continuous full disks (FDs). Our main findings are as follows. (1) Inner disks evolve faster than the outer disks. (2) The mass accretion rates of TDs and those of radially continuous FDs are statistically significantly displaced from each other. The median mass accretion rate of radially continuous disks in the ONC and L1641 is not very different from that in Taurus. (3) Less grain processing has occurred in the disks in the ONC compared to those in Taurus, based on analysis of the shape index of the 10 µm silicate feature (F11.3/F9.8). (4) The 20-31 µm continuum spectral index tracks the projected distance from the most luminous Trapezium star, θ^1 Ori C. A possible explanation is UV ablation of the outer parts of disks.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): accretion, accretion disk - infrared: stars - protoplanetary disks - stars: pre-main sequence - surveys - surveys

VizieR on-line data: <Available at CDS (J/ApJS/226/8): table1.dat table2.dat table3.dat table4.dat table6.dat table7.dat table8.dat table11.dat refs.dat>

Simbad objects: 341

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2016ApJS..226....8K and select 'bookmark this link' or equivalent in the popup menu


2019.12.12-12:36:03

© Université de Strasbourg/CNRS

    • Contact