Results 11 to 20 of about 220 (138)
Lifetime of the Outer Solar System Nebula From Carbonaceous Chondrites
Journal of Geophysical Research: Planets, Volume 127, Issue 7, July 2022., 2022 Abstract The evolution and lifetime of protoplanetary disks (PPDs) play a central role in the formation and architecture of planetary systems. Astronomical observations suggest that PPDs evolve in two timescales, accreting onto the star for up to several million years (Myr) followed by gas dissipation within ≲1 Myr. Because solar nebula magnetic fields
Cauê S. Borlina +3 more
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The Naming of Stars and the Study of Protostars [PDF]
International Astronomical Union Colloquium, 1993 AbstractThe logic of naming stars could be based more on physical principles as happened in the naming of resonances in Particle Physics. A possible system might be based on extensive Monte Carlo studies of protostars followed by standard Stellar Evolutionary Model calculations.
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Security and Communication Networks, Volume 2022, Issue 1, 2022., 2022 At present, the health monitoring system of world sports events uses the system's on‐site information or periodic test information to evaluate the health of the system. In order to make the data more accurate, the application of cloud computing is necessary.
Rui Feng, Ning Chang, Muhammad Arif
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Disks and outflows around intermediate-mass stars and protostars [PDF]
Astronomy & Astrophysics, 2001 In order to study the existence and evolution of circumstellar disks around intermediate-mass stars (M 3M), we have obtained single-dish and interferometric continuum images at 2.6 mm and 1.3 mm of the intermediate-mass protostar NGC 7129 FIRS 2 and of the Herbig Be stars LkH 234 and HD 200775.
A. Fuente +5 more
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What Can Meteorites Tell Us About the Formation of Jupiter?
AGU Advances, Volume 2, Issue 2, June 2021., 2021 Abstract Gas giants like Jupiter are a fundamental component of planetary systems, but how they formed has been uncertain. Here we discuss how paleomagnetic records in meteorites of the solar nebula may tell us about Jupiter's final growth stage. We suggest that under certain testable assumptions, the meteorite data indicate that proto‐Jupiter grew ...
Benjamin P. Weiss, William F. Bottke
wiley +1 more source
X-rays from jet-driving protostars and T Tauri stars [PDF]
Astronomy & Astrophysics, 2006 (abridged:) We study X-rays from jet-driving protostars and T Tau stars. We seek soft spectral components that may be due to shock emission, and shock-induced emission displaced from the stellar position. Two stellar samples are used, the first consisting of lightly absorbed T Tau stars with strong jets, the other containing protostars with disks seen ...
Güdel, M. +6 more
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X‐Ray Study of Triggered Star Formation and Protostars in IC 1396N [PDF]
The Astrophysical Journal, 2007 The IC 1396N cometary globule within the large nearby HII region IC 1396 has been observed with the ACIS detector on board the Chandra X-ray Observatory. We detect 117 X-ray sources, of which ~50-60 are likely members of the young open cluster Trumpler~37 dispersed throughout the HII region, and 25 are associated with young stars formed within the ...
Getman, Konstantin V. +4 more
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Star formation in a turbulent framework: from giant molecular clouds to protostars [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 13 pages, 13 ...
Guszejnov, Dávid, Hopkins, Philip F.
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YOUNG STELLAR POPULATIONS IN MYStIX STAR-FORMING REGIONS: CANDIDATE PROTOSTARS [PDF]
The Astrophysical Journal, 2016 ABSTRACT The Massive Young Star-Forming Complex in Infrared and X-ray (MYStIX) project provides a new census on stellar members of massive star-forming regions within 4 kpc. Here the MYStIX Infrared Excess catalog and Chandra-based X-ray photometric catalogs are mined to obtain high-quality samples of Class I protostars using criteria ...
Gregory Romine +4 more
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Star Formation: From OB Associations to Protostars [PDF]
Symposium - International Astronomical Union, 1987 The study of star formation is a relatively young discipline of the field of astronomy. Up until the mid point of the twentieth century only a most rudimentary understanding of the subject was possible. This is because prior to that time there did not exist any substantive body of empirical data which could be used to critically test even the most ...
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