123 citations · 887 across the 36 of their papers we have counts for
19 papers · 1 filter
Origin of the Shell Structure in the Primary Outflow from IRAS 15398-3359
Tomoyuki Hanawa, Yuki Okoda, Yao-Lun Yang +1
IRAS 15398-3359, a Class 0 protostar in Lupus I star forming region, is associated with three generations of outflows. The primary outflow, i.e., the most recent one, shows interna…
JWST observations of CO ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes
Nashanty G. C. Brunken, Will R. M. Rocha, Ewine F. van Dishoeck +38
The structure and composition of simple ices can be modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal and chemical…
ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): The Warm-Envelope Origin of Hot Corinos
Shih-Ying Hsu, Sheng-Yuan Liu, Doug Johnstone +24
Hot corinos are of great interest due to their richness in interstellar complex organic molecules (COMs) and the consequent potential prebiotic connection to solar-like planetary s…
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…
Massive Protostars in a Protocluster -- A Multi-Scale ALMA View of G35.20-0.74N
Yichen Zhang, Kei E. I. Tanaka, Jonathan C. Tan +8
We present a detailed study of the massive star-forming region G35.2-0.74N with ALMA 1.3 mm multi-configuration observations. At 0.2" (440 au) resolution, the continuum emission re…
Disks and Outflows in the Intermediate-mass Star Forming Region NGC 2071 IR
Yu Cheng, John J. Tobin, Yao-Lun Yang +13
We present ALMA band 6/7 (1.3 mm/0.87 mm) and VLA Ka band (9 mm) observations toward NGC 2071 IR, an intermediate-mass star forming region. We characterize the continuum and associ…
The SOFIA Massive (SOMA) Star Formation Survey. IV. Isolated Protostars
Ruben Fedriani, Jonathan C. Tan, Zoie Telkamp +13
We present m SOFIA-FORCAST images of 11 isolated protostars as part of the SOFIA Massive (SOMA) Star Formation Survey, with this morphological classification based on…
ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A Hot Corino Survey toward Protostellar Cores in the Orion Cloud
Shih-Ying Hsu, Sheng-Yuan Liu, Tie Liu +25
The presence of complex organic molecules (COMs) in the interstellar medium (ISM) is of great interest since it may link to the origin and prevalence of life in the universe. Aimin…
Isolated Massive Star Formation in G28.20-0.05
Chi-Yan Law, Jonathan C. Tan, Prasanta Gorai +9
We report high-resolution 1.3~mm continuum and molecular line observations of the massive protostar G28.20-0.05 with ALMA. The continuum image reveals a ring-like structure with 2,…
Atomic Shocks in the Outflow of L1551 IRS 5 Identified with SOFIA-upGREAT Observations of [OI]
Yao-Lun Yang, Neal J. Evans, Agata Karska +5
We present velocity resolved SOFIA/upGREAT observations of [OI] and [CII] lines toward a Class I protostar, L1551 IRS 5, and its outflows. The SOFIA observations detect [OI] emissi…
TIMES II: Investigating the Relation Between Turbulence and Star-forming Environments in Molecular Clouds
Hyeong-Sik Yun, Jeong-Eun Lee, Neal J. Evans +14
We investigate the effect of star formation on turbulence in the Orion A and Ophiuchus clouds using principal component analysis (PCA). We measure the properties of turbulence by a…
TIMES I: a Systematic Observation in Multiple Molecular Lines Toward the Orion A and Ophiuchus Clouds
Hyeong-Sik Yun, Jeong-Eun Lee, Yunhee Choi +16
We have used the Taeduk Radio Astronomy Observatory to observe the Orion A and Ophiuchus clouds in the 10 lines of CO, CO, HCN, HCO, and NH and the…
The Perseus ALMA Chemistry Survey (PEACHES). I. The Complex Organic Molecules in Perseus Embedded Protostars
Yao-Lun Yang, Nami Sakai, Yichen Zhang +14
To date, about two dozen low-mass embedded protostars exhibit rich spectra with lines of complex organic molecule (COM). These protostars seem to possess different enrichment in CO…
The SOFIA Massive (SOMA) Star Formation Survey. III. From Intermediate- to High-Mass Protostars
Mengyao Liu, Jonathan C. Tan, James M. De Buizer +9
We present m SOFIA-FORCAST images of 14 intermediate-mass protostar candidates as part of the SOFIA Massive (SOMA) Star Formation Survey. We build spectral energy dis…
Astro2020 Science White Paper: Measuring Protostar Masses: The Key to Protostellar Evolution
John J. Tobin, Stella Offner, Patrick Sheehan +10
Knowledge of protostellar evolution has been revolutionized with the advent of surveys at near-infrared to submillimeter wavelengths. This has enabled the bolometric luminosities a…
Astro2020 Science White Paper: The Formation and Evolution of Multiple Star Systems
John J. Tobin, Marina Kounkel, Stella Offner +13
Significant advances have been made over the past decade in the characterization of multiple protostar systems, enabled by the Karl G. Jansky Very Large Array (VLA), high-resolutio…
Planck Cold Clumps in the Orionis complex. II. Environmental effects on core formation
Hee-Weon Yi, Jeong-Eun Lee, Tie Liu +27
Based on the 850 m dust continuum data from SCUBA-2 at James Clerk Maxwell Telescope (JCMT), we compare overall properties of Planck Galactic Cold Clumps (PGCCs) in the Orio…
CO in Protostars (COPS): -SPIRE Spectroscopy of Embedded Protostars
Yao-Lun Yang, Joel D. Green, Neal J. Evans +13
We present full spectral scans from 200-670m of 26 Class 0+I protostellar sources, obtained with -SPIRE, as part of the "COPS-SPIRE" Open Time program, complementary t…
Evidence for Decay of Turbulence by MHD Shocks in Molecular Clouds via CO Emission
Rebecca L. Larson, Neal J. Evans, Joel D. Green +1
We utilize observations of sub-millimeter rotational transitions of CO from a Herschel Cycle 2 open time program ("COPS", PI: J. Green) to identify previously predicted turbulent d…