Results 1 to 10 of about 24,950 (177)

Searching for Molecular Jets from High-mass Protostars [PDF]

open access: goldThe Astrophysical Journal Supplement Series, 2023
We report Very Large Array observations in the Q band toward 10 ionized jet candidates to search for SiO emission, a well-known shocked gas tracer. We detected 7 mm continuum counterparts toward 90% of the jet candidates. In most cases, the jet candidate
Tatiana M. Rodríguez   +4 more
doaj   +2 more sources

Far-infrared Luminosity Bursts Trace Mass Accretion onto Protostars [PDF]

open access: goldThe Astronomical Journal
Evidence abounds that young stellar objects undergo luminous bursts of intense accretion that are short compared to the time it takes to form a star. It remains unclear how much these events contribute to the main-sequence masses of the stars.
William J. Fischer   +8 more
doaj   +2 more sources

The Protostars in Orion: Characterizing the Properties of Their Magnetized Envelopes

open access: goldThe Astrophysical Journal
We present a study connecting the physical properties of protostellar envelopes to the morphology of the envelope-scale magnetic field. We used the Atacama Large Millimeter/submillimeter Array (ALMA) polarization observations of 61 young protostars at 0 ...
Bo Huang   +19 more
doaj   +2 more sources

Enlightening the Chemistry of Infalling Envelopes and Accretion Disks Around Sun-Like Protostars: The ALMA FAUST Project

open access: yesFrontiers in Astronomy and Space Sciences, 2021
The huge variety of planetary systems discovered in recent decades likely depends on the early history of their formation. In this contribution, we introduce the FAUST Large Program which focuses specifically on the early history of solar-like protostars
C. Codella   +6 more
doaj   +1 more source

Extension of HOPS out to 500 pc (eHOPS). I. Identification and Modeling of Protostars in the Aquila Molecular Clouds

open access: yesThe Astrophysical Journal Supplement Series, 2023
We present a Spitzer/Herschel focused survey of the Aquila molecular clouds ( d ∼ 436 pc) as part of the eHOPS (extension of the Herschel orion protostar survey, or HOPS, Out to 500 ParSecs) census of nearby protostars.
Riwaj Pokhrel   +16 more
doaj   +1 more source

Recent progress with observations and models to characterize the magnetic fields from star-forming cores to protostellar disks

open access: yesFrontiers in Astronomy and Space Sciences, 2022
In this review article, we aim at providing a global outlook on the progresses made in the recent years to characterize the role of magnetic fields during the embedded phases of the star formation process.
Anaëlle Maury   +4 more
doaj   +1 more source

Early Planet Formation in Embedded Disks (eDisk). I. Overview of the Program and First Results

open access: yesThe Astrophysical Journal, 2023
We present an overview of the Large Program, “Early Planet Formation in Embedded Disks (eDisk),” conducted with the Atacama Large Millimeter/submillimeter Array (ALMA).
Nagayoshi Ohashi   +36 more
doaj   +1 more source

Herschel-PACS imaging of protostars in the HH 1–2 outflow complex [PDF]

open access: yes, 2010
We present 70 and 160 μm Herschel science demonstration images of a field in the Orion A molecular cloud that contains the prototypical Herbig-Haro objects HH 1 and 2, obtained with the Photodetector Array Camera and Spectrometer (PACS).
Ali, B., Fischer, W. J., Pontoppidan, K.
core   +5 more sources

The Rate, Amplitude, and Duration of Outbursts from Class 0 Protostars in Orion

open access: yesThe Astrophysical Journal Letters, 2022
At least half of a protostar’s mass is accreted in the Class 0 phase, when the central protostar is deeply embedded in a dense, infalling envelope. We present the first systematic search for outbursts from Class 0 protostars in the Orion clouds.
Wafa Zakri   +20 more
doaj   +1 more source

300: An ACA 870 μm Continuum Survey of Orion Protostars and Their Evolution

open access: yesThe Astrophysical Journal, 2023
We present an 870 μ m continuum survey of 300 protostars from the Herschel Orion Protostar Survey using the Atacama Compact Array (ACA). These data measure protostellar flux densities on envelope scales ≤8000 au (20″) and resolve the structure of ...
Samuel Federman   +13 more
doaj   +1 more source

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