Results 31 to 40 of about 282,229 (301)
Planetary nebulae as mass tracers in galaxies [PDF]
Proceedings of the International Astronomical Union, 2006 Planetary nebulae are useful kinematic tracers of the stars in all galaxy types. I review recent observationally-driven developments in the study of galaxy mass profiles. These have yielded surprising results on spiral galaxy disk masses and elliptical galaxy halo masses.
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Forming equal-mass planetary binaries via pebble accretion
Astronomy & Astrophysics, 2023 Context. Binary Solar System objects are common, ranging from satellite systems with very large mass ratios, M1/M2, to those with mass ratios approaching unity. One well-known example of a binary is the Pluto-Charon system. With Charon being 'only' eight times less massive than Pluto, the question arises (as in the case of many other systems) as to why
T. J. Konijn +3 more
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The Cosmic Zoo: The (Near) Inevitability of the Evolution of Complex, Macroscopic Life
Life, 2016 Life on Earth provides a unique biological record from single-cell microbes to technologically intelligent life forms. Our evolution is marked by several major steps or innovations along a path of increasing complexity from microbes to space-faring ...
William Bains, Dirk Schulze-Makuch
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Binary Central Stars of Planetary Nebulae
Galaxies, 2020 It is now clear that a vast majority of intermediate-mass stars have stellar and/or sub-stellar companions, therefore it is no longer appropriate to consider planetary nebulae as a single-star phenomenon, although some single, isolated stars may well ...
David Jones
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The Astrophysical Journal Letters, 2023 We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a
Brittany E. Miles +110 more
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Very Late Thermal Pulses Influenced by Accretion in Planetary Nebulae
, 2009 We consider the possibility that a mass of ~10^{-5}-10^{-3} Msun flows back from the dense shell of planetary nebulae and is accreted by the central star during the planetary nebula phase.
Adam Frankowski +25 more
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MASS LOSS FROM PLANETARY NEBULAE IN ELLIPTICAL GALAXIES [PDF]
The Astrophysical Journal, 2009 34 pages with 20 figures.
Bregman, Joel N., Parriott, Joel R.
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Planetary Core Formation with Collisional Fragmentation and Atmosphere to Form Gas Giant Planets
, 2011 Massive planetary cores ($\sim 10$ Earth masses) trigger rapid gas accretion to form gas giant planets \rev{such as} Jupiter and Saturn. We investigate the core growth and the possibilities for cores to reach such a critical core mass. At the late stage,
Alexander V. Krivov +23 more
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Probing the Upper Scorpius mass function in the planetary-mass regime★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 We present the results of a deep ZYJ near-infrared survey of 13.5 square degrees in the Upper Scorpius (USco) OB association. We photometrically selected ~100 cluster member candidates with masses in the range 30-5 Jupiters, according to state-of-the-art evolutionary models.
Lodieu, N. +6 more
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Advanced Engineering Materials, EarlyView.The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan +4 more
wiley +1 more source