Dynamics in Star-forming Cores (DiSCo): project o v er viewãnd the first look towards the B1ãnd NGC 1333 regions in Perseus

Che Yu Chen, Rachel Friesen, Jialu Li, Anika Schmiedeke, David Frayer, Zhi Yun Li, John Tobin, Leslie W. Looney, Stella Offner, Lee G. Mundy, Andrew I. Harris, Sarah Church, Eve C. Ostriker, Jaime E. Pineda, Tien Hao Hsieh, Ka Ho Lam

Research output: Contribution to journalArticlepeer-review


The internal velocity structure within dense gaseous cores playsã crucial role in providing the initial conditions for star formation in molecular clouds. Ho we ver, the kinematic properties of dense gasãt core scales ( ∼0.01 -0.1 pc) has not been e xtensiv ely characterized because of instrument limitations until the unique capabilities of GBT- Argus becameãvailable. The ongoing GBT- Argus Large Program, Dynamics in Star-forming Cores (DiSCo) thusãims to investigate the originãnd distribution ofãngular momentum of star-forming cores. DiSCo will surv e yãll starless coresãnd 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 N 2 H + . Here, we present the first data sets from DiSCo towards the B1ãnd NGC 1333 regions in Perseus. Our results suggest thatã 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 setsãlso reaffirm theãbility of GBT- Argus for studying dense core velocity structureãnd providedãn empirical basis for future studies thatãddress theãngular momentum problem withã statistically broad sample.

Original languageEnglish (US)
Pages (from-to)10279-10293
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
StatePublished - Feb 1 2024

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • ISM: kinematicsãnd dynamics
  • ISM: molecules
  • radio lines: ISM
  • stars: formation
  • stars: protostars


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