A Caltech Library Service

A High-resolution Mid-infrared Survey of Water Emission from Protoplanetary Disks

Salyk, Colette and Lacy, John and Richter, Matt and Zhang, Ke and Pontoppidan, Klaus and Carr, John S. and Najita, Joan R. and Blake, Geoffrey A. (2019) A High-resolution Mid-infrared Survey of Water Emission from Protoplanetary Disks. Astrophysical Journal, 874 (1). Art. No. 24. ISSN 1538-4357. doi:10.3847/1538-4357/ab05c3.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


We present the largest survey of spectrally resolved mid-infrared water emission to date, with spectra for 11 disks obtained with the Michelle and TEXES spectrographs on Gemini North. Water emission is detected in six of eight disks around classical T Tauri stars. Water emission is not detected in the transitional disks SR 24 N and SR 24 S, in spite of SR 24 S having pretransitional disk properties like DoAr 44, which does show water emission. With R ~ 100,000, the TEXES water spectra have the highest spectral resolution possible at this time, and allow for detailed line shape analysis. We find that the mid-IR water emission lines are similar to the "narrow component" in CO rovibrational emission, consistent with disk radii of a few astronomical units. The emission lines are either single peaked, or consistent with a double peak. Single-peaked emission lines cannot be produced with a Keplerian disk model, and may suggest that water participates in the disk winds proposed to explain single-peaked CO emission lines. Double-peaked emission lines can be used to determine the radius at which the line emission luminosity drops off. For HL Tau, the lower limit on this measured dropoff radius is consistent with the 13 au dark ring. We also report variable line/continuum ratios from the disks around DR Tau and RW Aur, which we attribute to continuum changes and line flux changes, respectively. The reduction in RW Aur line flux corresponds with an observed dimming at visible wavelengths.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Salyk, Colette0000-0003-3682-6632
Lacy, John0000-0001-6783-2328
Richter, Matt0000-0002-8594-2122
Zhang, Ke0000-0002-0661-7517
Pontoppidan, Klaus0000-0001-7552-1562
Carr, John S.0000-0002-6695-3977
Blake, Geoffrey A.0000-0003-0787-1610
Additional Information:© 2019 The American Astronomical Society. Received 2018 July 30; revised 2019 February 7; accepted 2019 February 7; published 2019 March 18. The authors thank the anonymous reviewer for thoughtful suggestions that improved the manuscript. The authors thank Marie Lemoine-Busserolle and Rachel Mason for their support during the Michelle observations at Gemini North. C.S. thanks Andrea Banzatti for providing CRIRES data and for helpful discussions. K.Z. acknowledges the support of NASA through Hubble Fellowship grant HST HF2-51401.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS-26555. This work is based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), Ministerio de Ciencia, Tecnologa e Innovacin Productiva (Argentina), and Ministerio da Ciencia, Tecnologia e Inovao (Brazil). This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This work has made use of data from the European Space Agency (ESA) mission Gaia (, processed by the Gaia Data Processing and Analysis Consortium (DPAC, Funding for the DPAC has been provided by national institutions, in particular, the institutions participating in the Gaia Multilateral Agreement.
Group:Astronomy Department
Funding AgencyGrant Number
NASA Hubble FellowshipHF2-51401.001-A
NASANAS 5-26555
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)UNSPECIFIED
Ministerio de Ciencia, Tecnología e Innovación ProductivaUNSPECIFIED
Ministério da Ciência, Tecnologia, Inovações e Comunicações (MCTIC)UNSPECIFIED
Gaia Multilateral AgreementUNSPECIFIED
Subject Keywords:protoplanetary disks – stars: pre-main sequence
Issue or Number:1
Record Number:CaltechAUTHORS:20190318-091714111
Persistent URL:
Official Citation:Colette Salyk et al 2019 ApJ 874 24
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93908
Deposited By: Tony Diaz
Deposited On:18 Mar 2019 17:57
Last Modified:16 Nov 2021 17:01

Repository Staff Only: item control page