Results 91 to 100 of about 22,863 (213)
The Astrophysical JournalInvestigating Protostellar Accretion is a Cycle 1 JWST program using the NIRSpec+MIRI integral field units to obtain 2.9–28 μ m spectral cubes of five young protostars with luminosities of 0.2–10,000 L _⊙ in their primary accretion phase.
Samuel A. Federman +38 more
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Detections of Compact Radio Continuum toward Methanol Maser Rings Using the VLA
The Astrophysical JournalHigh-mass protostars are deeply embedded in dust inside their natal cores and are not easily detectable. However, maser emission at centimeter wavelengths, owing to its high brightness, enables us to study gas kinematics in protostars’ circumstellar ...
Anna Bartkiewicz +7 more
doaj +1 more source
The Astrophysical JournalUnderstanding the physical properties of star-forming cores as mass reservoirs for protostars and the impact of turbulence is crucial in star formation studies.
Shingo Nozaki +3 more
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Episodic accretion in binary protostars emerging from self-gravitating solar mass cores
, 2017 Observations show a large spread in the luminosities of young protostars, which are frequently explained in the context of episodic accretion. We here test this scenario using numerical simulations following the collapse of a solar mass molecular cloud ...
Riaz, R. +2 more
core +1 more source
Disk Wind Feedback from High-mass Protostars. IV. Shock-ionized Jets
The Astrophysical JournalMassive protostars launch accretion-powered, magnetically collimated outflows, which play crucial roles in the dynamics and diagnostics of the star formation process. Here we calculate the shock heating and resulting free–free radio emission in numerical
Emiko C. Gardiner +5 more
doaj +1 more source
, 2015 The accretion histories of embedded protostars are an integral part of descriptions of their physical and chemical evolution. In particular, are the accretion rates smoothly declining from the earlier toward later stages or in fact characterized by ...
Bergin, Edwin A. +3 more
core +1 more source
ngVLA Synthetic Observations of Ionized Gas in Massive Protostars
The Astrophysical JournalMassive-star formation involves significant ionization in the innermost regions near the central object, such as gravitationally trapped H ii regions, jets, ionized disks, or winds. Resolved observations of the associated continuum and recombination line
Jesús M. Jáquez-Domínguez +13 more
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A Candidate Protoplanet in the Taurus Star Forming Region
, 1998 HST/NICMOS images of the class I protostar TMR-1 (IRAS04361+2547) reveal a faint companion with 10.0" = 1400 AU projected separation. The central protostar is itself resolved as a close binary with 0.31" = 42 AU separation, surrounded by circumstellar ...
Bate M. R. +9 more
core +2 more sources
The infrared Galactic disk: What have we learned?
EPJ Web of Conferences, 2012 A brief overview is given of some of the new insights we have achieved from the Spitzer/GLIMPSE/MIPSGAL surveys of the Galactic plane. Particular emphasis is given to infrared bubbles, rapidly accreting protostars, infrared dark clouds, and diffuse PAH ...
Churchwell E.
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The Protostars in Orion: Characterizing the Properties of Their Magnetized Envelopes
The Astrophysical JournalWe 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 +1 more source