Results 41 to 50 of about 350,468 (289)
The Presolar Heritage of 50Ti and 26Al Heterogeneity in the Protoplanetary Disk
The Astrophysical JournalNucleosynthetic isotope anomalies have been documented within the solar protoplanetary disk for several isotopes, including ^48 Ca, ^50 Ti, ^54 Cr, ^94 Mo, and ^96 Zr.
Kirsten K. Larsen +5 more
doaj +1 more source
Simulations for Terrestrial Planets Formation [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractWe investigate the formation of terrestrial planets in the late stage of planetary formation using two-planet model. At that time, the protostar has formed for about 3 Myr and the gas disk has dissipated. In the model, the perturbations from Jupiter and Saturn are considered.
Jianghui, Ji, Niu, Zhang
openaire +4 more sources
Radioactive Planet Formation [PDF]
The Astrophysical Journal, 2021 Abstract Young stellar objects are observed to have large X-ray fluxes and are thought to produce commensurate luminosities in energetic particles (cosmic rays). This particle radiation, in turn, can synthesize short-lived radioactive nuclei through spallation.
openaire +2 more sources
Overview of molecular signatures of senescence and associated resources: pros and cons
FEBS Open Bio, EarlyView.Cells can enter a stress response state termed cellular senescence that is involved in various diseases and aging. Detecting these cells is challenging due to the lack of universal biomarkers. This review presents the current state of senescence identification, from biomarkers to molecular signatures, compares tools and approaches, and highlights ...
Orestis A. Ntintas +6 more
wiley +1 more source
Multiple Rings and Asymmetric Structures in the Disk of SR 21
The Astrophysical Journal, 2023 Crescent-like asymmetric dust structures discovered in protoplanetary disks indicate dust aggregations. Thus, researching these structures helps us understand the planet formation process. Here we analyze ALMA data of the protoplanetary disk around the T-
Yi Yang +11 more
doaj +1 more source
Overcoming migration during giant planet formation
, 2007 In the core accretion model, gas giant formation is a race between growth and migration; for a core to become a jovian planet, it must accrete its envelope before it spirals into the host star.
Edward W. Thommes +3 more
core +1 more source
Metallicity effect and planet mass function in pebble-based planet formation models [PDF]
, 2018 One of the main scenarios of planet formation is the core accretion model where a massive core forms first and then accretes a gaseous envelope. This core forms by accreting solids, either planetesimals, or pebbles. A key constraint in this model is that
Alibert, Yann +3 more
core +2 more sources
FEBS Open Bio, EarlyView.Despite frogs avoiding low temperatures, examination of four salamander species revealed that none avoided cold and all possessed cold tolerance. Functional analysis of TRPM8, a cold sensor, showed that all salamander TRPM8s had lost their cold sensitivity.
Tadahiro Sawao +3 more
wiley +1 more source
Redox evolutions of planetary mantle reservoirs constrained by titanium isotopes
Communications Earth & EnvironmentThe oxygen fugacity (hereafter referred as fO2) of terrestrial planets is key in defining the outcome of planetary-scale differentiation and the planets’ potential habitability.
Zhengbin Deng +5 more
doaj +1 more source
Composition and Sticking of Hot Chondritic Dust in a Protoplanetary Hydrogen Atmosphere
The Planetary Science Journal, 2023 The sticking properties of dust in early phases of planet formation depend on the thermal history and ambient atmosphere. Therefore, dust will change its ability to build larger aggregates in collisions, depending on its location in protoplanetary disks.
Cynthia Pillich +5 more
doaj +1 more source