166 citations · 1.5k across the 32 of their papers we have counts for
34 papers
FAUST XXXII. Chemically layered structures and ionisation in the disk and envelope of NGC 1333 IRAS 4C
Shota Notsu, Nami Sakai, Yichen Zhang +71
Recent molecular line observations with high spatial resolutions have revealed vertical chemical stratification in Class I/II disks (i.e. chemical composition changing with height…
Models of Rotating Infall for the B335 Protostar
Neal J. Evans, Yao-Lun Yang, Joel D. Green +7
Models of the protostellar source, B335, are developed using axisymmetric three-dimensional models to resolve conflicts found in one-dimensional models. The models are constrained…
Increasing mass-to-flux ratio from the dense core to the protostellar envelope around the Class 0 protostar HH 211
Hsi-Wei Yen, Patrick Koch, Chin-Fei Lee +7
To study transportation of magnetic flux from large to small scales in protostellar sources, we analyzed the Nobeyama 45-m N2H+ (1-0), JCMT 850 um polarization, and ALMA C18O (2-1)…
The role of magnetic fields in the formation of protostars, disks, and outflows
Yusuke Tsukamoto, Anaëlle Maury, Benoît Commerçon +6
We present our current understanding of the formation and early evolution of protostars, protoplanetary disks, and the driving of outflows as dictated by the interplay of magnetic…
Chemical and Physical Characterization of the Isolated Protostellar Source CB68: FAUST. IV
Muneaki Imai, Yoko Oya, Brian Svoboda +1
Chemical diversity of low-mass protostellar sources has so far been recognized, and environmental effects are invoked as its origin. In this context, observations of isolated proto…
The Central 1000 au of a Pre-stellar Core Revealed with ALMA. II. Almost Complete Freeze-out
Paola Caselli, Jaime E. Pineda, Olli Sipilä +18
Pre-stellar cores represent the initial conditions in the process of star and planet formation. Their low temperatures (10 K) allow the formation of thick icy dust mantles, whic…
FAUST III. Misaligned rotations of the envelope, outflow, and disks in the multiple protostellar system of VLA 16232417
Satoshi Ohashi, Claudio Codella, Nami Sakai +69
We report a study of the low-mass Class-0 multiple system VLA 1623AB in the Ophiuchus star-forming region, using HCO (), CS (), and CCH () lines as…
Accretion Flows or Outflow Cavities? Uncovering the Gas Dynamics around Lupus 3-MMS
Travis J. Thieme, Shih-Ping Lai, Sheng-Jun Lin +6
Understanding how material accretes onto the rotationally supported disk from the surrounding envelope of gas and dust in the youngest protostellar systems is important for describ…
The young protostellar disk in IRAS16293-2422 B is hot and shows signatures of gravitational instability
Joaquin Zamponi, María José Maureira, Bo Zhao +4
Deeply embedded protostars are actively fed from their surrounding envelopes through their protostellar disk. The physical structure of such early disks might be different from tha…
No impact of core-scale magnetic field, turbulence, or velocity gradient on sizes of protostellar disks in Orion A
Hsi-Wei Yen, Bo Zhao, Patrick M. Koch +1
We compared the sizes and fluxes of a sample of protostellar disks in Orion A measured with the ALMA 0.87 mm continuum data from the VANDAM survey with the physical properties of t…
FAUST II. Discovery of a Secondary Outflow in IRAS 15398-3359: Variability in Outflow Direction during the Earliest Stage of Star Formation?
Yuki Okoda, Yoko Oya, Logan Francis +66
We have observed the very low-mass Class 0 protostar IRAS 15398-3359 at scales ranging from 50 au to 1800 au, as part of the ALMA Large Program FAUST. We uncover a linear feature,…
The Interplay between Ambipolar Diffusion and Hall Effect on Magnetic Field Decoupling and Protostellar Disc Formation
Bo Zhao, Paola Caselli, Zhi-Yun Li +3
Non-ideal MHD effects have been shown recently as a robust mechanism of averting the magnetic braking "catastrophe" and promoting protostellar disc formation. However, the magnetic…
Hall Effect in Protostellar Disc Formation and Evolution
Bo Zhao, Paola Caselli, Zhi-Yun Li +3
The Hall effect is recently shown to be efficient in magnetized dense molecular cores, and could lead to a bimodal formation of rotationally supported discs (RSDs) in the first cor…
A protostellar system fed by a streamer of 10,500 au length
Jaime E. Pineda, Dominique Segura-Cox, Paola Caselli +5
Binary formation is an important aspect of star formation. One possible route for close-in binary formation is disk fragmentation. Recent observations show small scale…
Effect of grain size distribution and size-dependent grain heating on molecular abundances in starless and pre-stellar cores
O. Sipilä, B. Zhao, P. Caselli
We present a new gas-grain chemical model to constrain the effect of grain size distribution on molecular abundances in starless and pre-stellar cores. We introduce grain-size depe…
Rapid Elimination of Small Dust Grains in Molecular Clouds
Kedron Silsbee, Alexei Ivlev, Paola Caselli +2
We argue that impact velocities between dust grains with sizes less than in molecular cloud cores are dominated by drift arising from ambipolar diffusion. This effe…
Formation and Evolution of Disks around Young Stellar Objects
Bo Zhao, Kengo Tomida, Patrick Hennebelle +9
Recent observations have suggested that circumstellar disks may commonly form around young stellar objects. Although the formation of circumstellar disks can be a natural result of…
Transition from ordered pinched to warped magnetic field on a 100 au scale in the Class 0 protostar B335
Hsi-Wei Yen, Bo Zhao, Patrick Koch +6
We present our observational results of the 0.87 mm polarized dust emission in the Class 0 protostar B335 obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) at a…
Impact of magneto-rotational instability on grain growth in protoplanetary disks: I. Relevant turbulence properties
Munan Gong, Alexei V. Ivlev, Bo Zhao +1
Turbulence in the protoplanetary disks induces collisions between dust grains, and thus facilitates grain growth. We investigate the two fundamental assumptions of the turbulence i…
Disk Formation in Magnetized Dense Cores with Turbulence and Ambipolar Diffusion
Ka Ho Lam, Zhi-Yun Li, Che-Yu Chen +2
Disks are essential to the formation of both stars and planets, but how they form in magnetized molecular cloud cores remains debated. This work focuses on how the disk formation i…
The specific angular momentum radial profile in dense cores: improved initial conditions for disk formation
Jaime E. Pineda, Bo Zhao, Anika Schmiedeke +5
The determination of the specific angular momentum radial profile, , in the early stages of star formation is crucial to constrain star and circumstellar disk formation theor…
The central 1000 AU of a pre-stellar core revealed with ALMA. I. 1.3 mm continuum observations
Paola Caselli, Jaime E. Pineda, Bo Zhao +8
Stars like our Sun form in self-gravitating dense and cold structures within interstellar clouds, called pre-stellar cores. Although much is known about the physical structure of d…
JCMT POL-2 and ALMA polarimetric observations of 6000-100 au scales in the protostar B335: linking magnetic field and gas kinematics in observations and MHD simulations
Hsi-Wei Yen, Bo Zhao, I-Ta Hsieh +8
We present our analysis of the magnetic field structures from 6000 au to 100 au scales in the Class 0 protostar B335 inferred from our JCMT POL-2 observations and the ALMA archival…
On the Effects of Self-Obscuration in the (Sub-)Millimeter Spectral Indices and Appearance of Protostellar Disks
Roberto Galván-Madrid, Hauyu Baobab Liu, Andrés F. Izquierdo +5
In this paper we explore the effects of self-obscuration in protostellar disks with a radially decreasing temperature gradient and a colder midplane. We are motivated by recent rep…