1. Dynamics in Star-forming Cores (DiSCo): project overview and the first look towards the B1 and NGC 1333 regions in Perseus.
- Author
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Chen, Che-Yu, Friesen, Rachel, Li, Jialu, Schmiedeke, Anika, Frayer, David, Li, Zhi-Yun, Tobin, John, Looney, Leslie W, Offner, Stella, Mundy, Lee G, Harris, Andrew I, Church, Sarah, Ostriker, Eve C, Pineda, Jaime E, Hsieh, Tien-Hao, and Lam, Ka Ho
- Subjects
ANGULAR momentum (Mechanics) ,MOMENTUM distributions ,ANGULAR distribution (Nuclear physics) ,STAR formation ,MOLECULAR clouds ,STELLAR rotation ,RADIO lines ,STELLAR oscillations ,PROTOSTARS - Abstract
The internal velocity structure within dense gaseous cores plays a crucial role in providing the initial conditions for star formation in molecular clouds. However, the kinematic properties of dense gas at core scales (∼0.01−0.1 pc) has not been extensively characterized because of instrument limitations until the unique capabilities of GBT- Argus became available. The ongoing GBT- Argus Large Program, Dynamics in Star-forming Cores (DiSCo) thus aims to investigate the origin and distribution of angular momentum of star-forming cores. DiSCo will survey all starless cores and Class 0 protostellar cores in the Perseus molecular complex down to ∼0.01 pc scales with <0.05 km s
−1 velocity resolution using the dense gas tracer N2 H+ . Here, we present the first data sets from DiSCo towards the B1 and NGC 1333 regions in Perseus. Our results suggest that a dense core's internal velocity structure has little correlation with other core-scale properties, indicating these gas motions may be originated externally from cloud-scale turbulence. These first data sets also reaffirm the ability of GBT- Argus for studying dense core velocity structure and provided an empirical basis for future studies that address the angular momentum problem with a statistically broad sample. [ABSTRACT FROM AUTHOR]- Published
- 2024
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