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IN-SYNC II: Virial Stars from Sub-Virial Cores -- The Velocity Dispersion of Embedded Pre-Main-Sequence Stars in NGC 1333
Jonathan B. Foster, Michiel Cottaar, Kevin R. Covey +14
The initial velocity dispersion of newborn stars is a major unconstrained aspect of star formation theory. Using near-infrared spectra obtained with the APOGEE spectrograph, we sho…
ALMA Observations of the IRDC Clump G34.43+00.24 MM3: 278 GHz Class I Methanol Masers
Takahiro Yanagida, Takeshi Sakai, Tomoya Hirota +7
We have observed a molecular clump (MM3) associated with the infrared dark cloud G34.43+00.24 in the CH3OH J_K=9_{-1}--8_0 E, 5_0-4_0 E, and 5_{-1}-4_{-1} E lines at sub-arcsecond…
Absorption Filaments Towards the Massive Clump G0.253+0.016
John Bally, J. M. Rathborne, S. N. Longmore +11
ALMA HCO+ observations of the infrared dark cloud G0.253+0.016 located in the Central Molecular Zone of the Galaxy are presented. The 89 GHz emission is area-filling, optically thi…
Turbulence sets the initial conditions for star formation in high-pressure environments
J. M. Rathborne, S. N. Longmore, J. M. Jackson +9
Despite the simplicity of theoretical models of supersonically turbulent, isothermal media, their predictions successfully match the observed gas structure and star formation activ…
IN-SYNC I: Homogeneous Stellar Parameters from High Resolution APOGEE Spectra for Thousands of Pre-main Sequence Star
Michiel Cottaar, Kevin R. Covey, Michael R. Meyer +12
Over two years 8,859 high-resolution H-band spectra of 3,493 young (1 - 10 Myr) stars were gathered by the multi-object spectrograph of the APOGEE project as part of the IN-SYNC an…
Distributed Low-Mass Star Formation in the IRDC G34.43+00.24
Jonathan B. Foster, Héctor G. Arce, Marc Kassis +9
We have used deep near-infrared observations with adaptive optics to discover a distributed population of low-mass protostars within the filamentary Infrared Dark Cloud G34.43+00.2…