Results 101 to 110 of about 20,687 (218)

Submillimeter and Mid-infrared Variability of Young Stellar Objects in the M17 H II Region

open access: yesThe Astronomical Journal
We conducted a comprehensive analysis of young stellar object (YSO) variability at submillimeter and mid-infrared (mid-IR) wavelengths for the M17 H ii region using 3.5 yr monitoring data from the James Clerk Maxwell Telescope (JCMT) Transient Survey at ...
Zhiwei Chen   +14 more
doaj   +1 more source

A Large Molecular Gas Reservoir in the Protocluster SPT2349−56 at z = 4.3

open access: yesThe Astrophysical Journal Letters
We present Atacama Compact Array (ACA) Band-3 observations of the protocluster SPT2349−56, an extreme system hosting >10 ultraluminous infrared galaxies (ULIRGs; L _IR  ≳  10 ^12 L _⊙ ) in a 200 kpc diameter region at z  =  4.3, to study its integrated ...
Dazhi Zhou   +15 more
doaj   +1 more source

Thermal Structure and Millimeter Emission from a Protoplanetary Disk with Embedded Protoplanets from Radiative Transfer Modeling

open access: yesThe Astrophysical Journal
The discovery of protoplanets and circumplanetary disks provides a unique opportunity to characterize planet formation through observations. Massive protoplanets shape the physical and chemical structure of their host circumstellar disk by accretion ...
Felipe Alarcón, Edwin A. Bergin
doaj   +1 more source

A Monopolar Jet from Protostar HOPS 10: Evidence for Asymmetric Magnetized Launching

open access: yesThe Astronomical Journal
A fundamental challenge in star formation is understanding how a protostar accretes mass from its circumstellar disk while removing excess angular momentum.
Somnath Dutta
doaj   +1 more source

Molecular Jets from an Evolved Protostar: Insights from JWST-ALMA Synergy

open access: yesThe Astrophysical Journal
The combination of the Atacama Large Millimeter/submillimeter Array (ALMA) and JWST/MIRI mid-infrared observations offers a transformative view of protostellar jets and outflows by probing cold and warm gas components across diverse physical conditions ...
Somnath Dutta
doaj   +1 more source

Modeling Long-wavelength Amorphous Dust Emission Based on the Physically Motivated Soft-potential Model

open access: yesThe Astrophysical Journal
We propose a new amorphous dust emission model based on the soft-potential (SP) model, applicable in the long-wavelength range from the far-infrared to the microwave.
Masashi Nashimoto
doaj   +1 more source

The ALMA-ATOMS Survey: Exploring Protostellar Outflows in HC3N

open access: yesThe Astrophysical Journal
We present the first systematic study of bipolar outflows using HC _3 N as a tracer in a sample of 146 massive star-forming regions from the Atacama Large Millimeter/submillimeter Array Three-millimeter Observations of Massive Star-forming Regions (ATOMS)
Ariful Hoque   +27 more
doaj   +1 more source

The ALMA Survey of Gas Evolution of PROtoplanetary Disks (AGE-PRO). II. Dust and Gas Disk Properties in the Ophiuchus Star-forming Region

open access: yesThe Astrophysical Journal
The ALMA survey of Gas Evolution in PROtoplanetary disks (AGE-PRO) Large Program aims to trace the evolution of gas disk mass and size throughout the lifetime of protoplanetary disks by using the Atacama Large Millimeter/submillimeter Array (ALMA).
Dary A. Ruiz-Rodriguez   +19 more
doaj   +1 more source

RUBIES: JWST/NIRSpec Resolves Evolutionary Phases of Dusty Star-forming Galaxies at z ∼ 2

open access: yesThe Astrophysical Journal
The dearth of high-quality spectroscopy of dusty star-forming galaxies (DSFGs)—the main drivers of the assembly of dust and stellar mass at the peak of activity in the Universe—greatly hinders our ability to interpret their physical processes and ...
Olivia R. Cooper   +27 more
doaj   +1 more source

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