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The Spitzer c2d legacy results: star-formation rates and efficiencies; evolution and lifetimes
The c2d Spitzer Legacy project obtained images and photometry with both IRAC and MIPS instruments for five large, nearby molecular clouds. Three of the clouds were also mapped in dust continuum
Dense cores in dark clouds. VIII - Velocity gradients
An analysis of motions consistent with uniform rotation in dense cores is presented. Twenty-nine of the 43 cores studied have a statistically significant gradient. Some gradients are spatially
Dense Cores in Dark Clouds. XIV. N2H+ (1-0) Maps of Dense Cloud Cores
We present results of an extensive mapping survey of N2H+ (1-0) in about 60 low-mass cloud cores already mapped in the NH3 (1, 1) inversion transition line. The survey has been carried out at the
A SPITZER SURVEY OF YOUNG STELLAR CLUSTERS WITHIN ONE KILOPARSEC OF THE SUN: CLUSTER CORE EXTRACTION AND BASIC STRUCTURAL ANALYSIS
TLDR
It is demonstrated that near-uniform source spacingsmore » in cluster cores are common, suggesting that simple Jeans fragmentation of parsec-scale cloud clumps may be the dominant process governing star formation in nearby clusters and groups.
Infrared Array Camera (IRAC) Colors of Young Stellar Objects
We compare the infrared colors predicted by theoretical models of protostellar envelopes and protoplanetary disks with initial observations of young stellar objects made with the Infrared Array
The Mass Distribution and Lifetime of Prestellar Cores in Perseus, Serpens, and Ophiuchus
We present an unbiased census of starless cores in Perseus, Serpens, and Ophiuchus, assembled by comparing large-scale Bolocam 1.1 mm continuum emission maps with Spitzer c2d surveys. We use the c2d
On the internal structure of starless cores - I. Physical conditions and the distribution of CO, CS, N$\mathsf{_2}$H$\mathsf{^+}$, and NH$\mathsf{_3}$ in L1498 and L1517B
We have characterized the physical structure and chemical composition of two close-to-round starless cores in Taurus-Auriga, L1498 and L1517B. Our analysis is based on high angular resolution
Spitzer Observations of NGC 1333: A Study of Structure and Evolution in a Nearby Embedded Cluster
We present a comprehensive analysis of structure in the young, embedded cluster, NGC 1333 using members identified with Spitzer and 2MASS photometry based on their IR-excess emission. A total of 137
A Search for Infall Motions toward Nearby Young Stellar Objects
We report observations of 47 candidate protostars in two optically thick lines [H2CO (212-111) and CS (2-1)] and one optically thin line [N2H+ (1-0)] using the IRAM 30 m, SEST 15 m, and Haystack 37 m
Bolometric temperatures of young stellar objects
We propose the bolometric temperature T bol as a measure of the circumstellar obscuration and evolutionary development of a young stellar object (YSO). T bol is the temperature of a blackbody having
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