Chang Won Lee
Korea Astronomy and Space Science Institute
204 Papers
1.7K Citations
Chang Won Lee is an academic researcher from Korea Astronomy and Space Science Institute. The author has contributed to research in topics: Star formation & Molecular cloud. The author has an hindex of 33, co-authored 141 publications. Previous affiliations of Chang Won Lee include Korea University of Science and Technology.
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Papers
From molecular cores to planet-forming disks: An SIRTF legacy program
Neal J. Evans,Lori E. Allen,Geoffrey A. Blake,Adwin Boogert,Tyler L. Bourke,Paul M. Harvey,Jacqueline E. Kessler,David W. Koerner,Chang Won Lee,Lee G. Mundy,Philip C. Myers,Deborah Padgett,Klaus M. Pontoppidan,Anneila I. Sargent,Karl R. Stapelfeldt,Ewine F. van Dishoeck,Chadwick H. Young,Kaisa E. Young +17 more
TL;DR: The Space Infrared Telescope (SIRTF) provides an unprecedented improvement in sensitivity as mentioned in this paper, which can be used to observe sources that span the evolutionary sequence from molecular cores to protoplanetary disks, encompassing a wide range of cloud masses, stellar masses, and star forming environments.
Probing the Evolutionary Status of Starless Cores through N2H+ and N2D+ Observations
A. Crapsi,A. Crapsi,Paola Caselli,C. M. Walmsley,Philip C. Myers,M. Tafalla,Chang Won Lee,Tyler Bourke +7 more
TL;DR: In this paper, the abundance ratio of N2D+ and N2H+ toward the nuclei of these cores and thus to obtain estimates of the degree of deuterium enrichment, a symptom of advanced chemical evolution according to current models.
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Probing the evolutionary status of starless cores through N2H+ and N2D+ observations
A. Crapsi,A. Crapsi,Paola Caselli,C. M. Walmsley,Philip C. Myers,M. Tafalla,Chang Won Lee,Tyler Bourke +7 more
TL;DR: In this article, the abundance ratio of N2D+ and N2H+ towards the nuclei of these cores and thus to obtain estimates of the degree of deuterium enrichment, a symptom of advanced chemical evolution according to current models.
288
A “Starless” Core that Isn't: Detection of a Source in the L1014 Dense Core with the Spitzer Space Telescope
Chadwick H. Young,Jes K. Jørgensen,Yancy L. Shirley,Jens Kauffmann,T. L. Huard,Shih-Ping Lai,Chang Won Lee,Antonio Crapsi,Tyler L. Bourke,C. P. Dullemond,Timothy Y. Brooke,Alicia Porras,William Spiesman,Lori E. Allen,Geoffrey A. Blake,Neal J. Evans,Paul M. Harvey,David W. Koerner,Lee G. Mundy,Phillip C. Myers,Deborah L. Padgett,Anneila I. Sargent,Karl R. Stapelfeldt,Ewine F. van Dishoeck,Frank Bertoldi,Nicholas Chapman,Lucas A. Cieza,Christopher H. DeVries,Naomi A. Ridge,Zahed Wahhaj +29 more
TL;DR: In this paper, the authors present observations of L1014, a dense core in the Cygnus region previously thought to be starless, but data from the Spitzer Space Telescope show the presence of an embedded source.
A Survey for Infall Motions toward Starless Cores. II. $CS (2-1)$ and $N_2H^+ (1-0)$ Mapping Observations
TL;DR: In this article, an extensive mapping survey of 53 starless cores in the Optically Thick Line of CS 2-1 and Optically Thicker Line of N2H+ 1-0 and C18O1-0 was conducted to search for signatures of extended inward motions.
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