Zobrazeno 1 - 10
of 224
pro vyhledávání: '"Klein, Richard I"'
We use the POLARIS radiative transfer code to produce simulated circular polarization Zeeman emission maps of the CN $J = 1 - 0$ molecular line transition for two types of protostellar envelope magnetohydrodynamic simulations. Our first model is a lo
Externí odkaz:
http://arxiv.org/abs/2312.00884
We present the stability analysis of two regions, OMC-3 and OMC-4, in the massive and long molecular cloud complex of Orion A. We obtained $214~\mu$m HAWC+/SOFIA polarization data, and we make use of archival data for the column density and C$^{18}$O
Externí odkaz:
http://arxiv.org/abs/2206.00119
Autor:
Chen, Che-Yu, Li, Zhi-Yun, Mazzei, Renato R., Park, Jinsoo, Fissel, Laura M., Chen, Michael C. -Y., Klein, Richard I., Li, Pak Shing
Despite the rich observational results on interstellar magnetic fields in star-forming regions, it is still unclear how dynamically significant the magnetic fields are at varying physical scales, because direct measurement of the field strength is ob
Externí odkaz:
http://arxiv.org/abs/2205.09134
Beginning with cosmological initial conditions at z=100, we simulate the effects of magnetic fields on the formation of Population III stars and compare our results with the predictions of Paper I. We use Gadget-2 to follow the evolution of the syste
Externí odkaz:
http://arxiv.org/abs/2201.02225
Autor:
Li, Pak Shing, Lopez-Rodriguez, Enrique, Ajeddig, Hamza, André, Philippe, McKee, Christopher F., Rho, Jeonghee, Klein, Richard I.
Optical and infrared polarization mapping and recent Planck observations of the filamentary cloud L1495 in Taurus show that the large-scale magnetic field is approximately perpendicular to the long axis of the cloud. We use the HAWC+ polarimeter on S
Externí odkaz:
http://arxiv.org/abs/2111.12864
Autor:
Li, Pak Shing, Klein, Richard I.
We perform ideal MHD high resolution AMR simulations with driven turbulence and self-gravity and find that long filamentary molecular clouds are formed at the converging locations of large-scale turbulence flows and the filaments are bounded by gravi
Externí odkaz:
http://arxiv.org/abs/1901.04593
Star forming molecular clouds are observed to be both highly magnetized and turbulent. Consequently the formation of protostellar disks is largely dependent on the complex interaction between gravity, magnetic fields, and turbulence. Studies of non-t
Externí odkaz:
http://arxiv.org/abs/1709.05350
We present a large suite of simulations of the formation of low-mass star clusters. Our simulations include an extensive set of physical processes -- magnetohydrodynamics, radiative transfer, and protostellar outflows -- and span a wide range of viri
Externí odkaz:
http://arxiv.org/abs/1709.01277
Star formation in a filamentary infrared dark cloud (IRDC) is simulated over a dynamic range of 4.2 pc to 28 au for a period of $3.5\times 10^5$ yr, including magnetic fields and both radiative and outflow feedback from the protostars. At the end of
Externí odkaz:
http://arxiv.org/abs/1708.06770
The pressure exerted by massive stars' radiation fields is an important mechanism regulating their formation. Detailed simulation of massive star formation therefore requires an accurate treatment of radiation. However, all published simulations have
Externí odkaz:
http://arxiv.org/abs/1607.03117