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IN-SYNC. VIII. Primordial Disk Frequencies in NGC 1333, IC 348, and the Orion A Molecular Cloud

Yao, Yuhan and Meyer, Michael R. and Covey, Kevin R. and Tan, Jonathan C. and Da Rio, Nicola (2018) IN-SYNC. VIII. Primordial Disk Frequencies in NGC 1333, IC 348, and the Orion A Molecular Cloud. Astrophysical Journal, 869 (1). Art. No. 72. ISSN 1538-4357.

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In this paper, we address two issues related to primordial disk evolution in three clusters (NGC 1333, IC 348, and Orion A) observed by the INfrared Spectra of Young Nebulous Clusters (IN-SYNC) project. First, in each cluster, averaged over the spread of age, we investigate how disk lifetime is dependent on stellar mass. The general relation in IC 348 and Orion A is that primordial disks around intermediate-mass stars (2–5 M_⊙) evolve faster than those around loss-mass stars (0.1–1 M_⊙), which is consistent with previous results. However, considering only low-mass stars, we do not find a significant dependence of disk frequency on stellar mass. These results can help to better constrain theories on gas giant planet formation timescales. Second, in the Orion A molecular cloud, in the mass range of 0.35–0.7M_⊙, we provide the most robust evidence to date for disk evolution within a single cluster exhibiting modest age spread. By using surface gravity as an age indicator and employing 4.5 μm excess as a primordial disk diagnostic, we observe a trend of decreasing disk frequency for older stars. The detection of intra-cluster disk evolution in NGC 1333 and IC 348 is tentative, since the slight decrease of disk frequency for older stars is a less than 1σ effect.

Item Type:Article
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URLURL TypeDescription Paper
Yao, Yuhan0000-0001-6747-8509
Meyer, Michael R.0000-0003-1227-3084
Covey, Kevin R.0000-0001-6914-7797
Additional Information:© 2018. The American Astronomical Society. Received 2018 July 26; revised 2018 October 14; accepted 2018 October 15; published 2018 December 13. We acknowledge the anonymous referee, Lee Hartmann, Nuria Calvet, and Lynne Hillenbrand for valuable suggestions that greatly improved this manuscript. Stellar parameters for the Perseus sources are derived by Michiel Cottaar. Jonathan B. Foster also contributed to the design of the IN-SYNC program. Special thanks to Jesus Hernández and Mark J. Pecaut for patiently answering questions about details and techniques in their work. Y.Y. acknowledges China Scholarship Council (CSC) for supporting this research.
Funding AgencyGrant Number
China Scholarship CouncilUNSPECIFIED
Subject Keywords:protoplanetary disks; stars: formation; stars: pre-main sequence
Issue or Number:1
Record Number:CaltechAUTHORS:20181213-132119041
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Official Citation:Yuhan Yao et al 2018 ApJ 869 72
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91768
Deposited By: George Porter
Deposited On:13 Dec 2018 22:05
Last Modified:03 Oct 2019 23:32

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