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Effect of Magnetic Misalignment on Protobinary Evolution
Bo Zhao, Zhi-Yun Li, Kaitlin M. Kratter
The majority of solar-type stars reside in multiple systems, especially binaries. They form in dense cores of molecular clouds that are observed to be significantly magnetized. Our…
Hα Absorption in Transiting Exoplanet Atmospheres
Duncan Christie, Phil Arras, Zhi-Yun Li
Absorption of stellar Hα by the upper atmosphere of the planet HD189733b has recently been detected by Jensen et al. Motivated by this observation, we have developed a model for at…
Earliest Stages of Protocluster Formation: Substructure and Kinematics of Starless Cores in Orion
Katherine I. Lee, Leslie W. Looney, Scott Schnee +1
We study the structure and kinematics of nine 0.1 pc-scale cores in Orion with the IRAM 30-m telescope and at higher resolution eight of the cores with CARMA, using CS(2-1) as the…
Condition for the formation of micron-sized dust grains in dense molecular cloud cores
Hiroyuki Hirashita, Zhi-Yun Li
We investigate the condition for the formation of micron-sized grains in dense cores of molecular clouds. This is motivated by the detection of the mid-infrared emission from deep…
Alignment Between Flattened Protostellar Infall Envelopes and Ambient Magnetic Fields
Nicholas L. Chapman, Jacqueline A. Davidson, Paul F. Goldsmith +10
We present 350 micron polarization observations of four low-mass cores containing Class 0 protostars: L483, L1157, L1448-IRS2, and Serp-FIR1. This is the second paper in a larger s…
The evolution of the jet from Herbig Ae star HD 163296 from 1999 to 2011
H. M. Günther, P. C. Schneider, Z. -Y. Li
Young A and B stars, the so-called Herbig Ae/Be stars (HAeBe), are surrounded by an active accretion disk and drive outflows. We study the jet HH 409, which is launched from the HA…