Multi-source connectivity as the driver of solar wind variability in the heliosphere [0.03%]
多源连接性作为太阳风在日球层中变化的驱动因素
Stephanie L Yardley,David H Brooks,Raffaella D&#x;Amicis et al.
Stephanie L Yardley et al.
The ambient solar wind that fills the heliosphere originates from multiple sources in the solar corona and is highly structured. It is often described as high-speed, relatively homogeneous, plasma streams from coronal holes and slow-speed, ...
A possible direct exposure of the Earth to the cold dense interstellar medium 2-3 Myr ago [0.03%]
大约在2至3百万年前地球可能直接暴露于冷而稠密的星际介质中
Merav Opher,Abraham Loeb,J E G Peek
Merav Opher
Cold, dense clouds in the interstellar medium of our Galaxy are 4-5 orders of magnitude denser than their diffuse counterparts. Our Solar System has most likely encountered at least one of these dense clouds during its lifetime. However, ev...
Nightside clouds and disequilibrium chemistry on the hot Jupiter WASP-43b [0.03%]
热木星WASP-43b的夜侧云和非平衡化学反应
Taylor J Bell,Nicolas Crouzet,Patricio E Cubillos et al.
Taylor J Bell et al.
Hot Jupiters are among the best-studied exoplanets, but it is still poorly understood how their chemical composition and cloud properties vary with longitude. Theoretical models predict that clouds may condense on the nightside and that mol...
JWST detection of a supernova associated with GRB 221009A without an r-process signature [0.03%]
詹姆斯韦伯空间望远镜发现的无r-过程信号的GRB 221009A相关超新星
Peter K Blanchard,V Ashley Villar,Ryan Chornock et al.
Peter K Blanchard et al.
Identifying the sites of r-process nucleosynthesis, a primary mechanism of heavy element production, is a key goal of astrophysics. The discovery of the brightest gamma-ray burst (GRB) to date, GRB 221009A, presented an opportunity to spect...
Sputnik Planitia as an impactor remnant indicative of an ancient rocky mascon in an oceanless Pluto [0.03%]
冥王星上的斯普特尼克平原是撞击遗迹，表明其古时存在无海洋的岩石质量集中区
Harry A Ballantyne,Erik Asphaug,C Adeene Denton et al.
Harry A Ballantyne et al.
Pluto's surface is dominated by the huge, pear-shaped basin Sputnik Planitia. It appears to be of impact origin, but modelling has not yet explained its peculiar geometry. We propose an impact mechanism that reproduces its topographic shape...
Gregory Desvignes,Patrick Weltevrede,Yong Gao et al.
Gregory Desvignes et al.
Magnetars-highly magnetized neutron stars-are thought to be the most likely progenitors for fast radio bursts (FRBs). Freely precessing magnetars are further invoked to explain the repeating FRBs. We report here on new high-cadence radio ob...
J R Szalay,F Allegrini,R W Ebert et al.
J R Szalay et al.
Jupiter's moon Europa has a predominantly water-ice surface that is modified by exposure to its space environment. Charged particles break molecular bonds in surface ice, thus dissociating the water to ultimately produce H2 and O2, which pr...
A radius valley between migrated steam worlds and evaporated rocky cores [0.03%]
迁移蒸汽世界和蒸发岩质核心之间的半径谷地带
Remo Burn,Christoph Mordasini,Lokesh Mishra et al.
Remo Burn et al.
The radius valley (or gap) in the observed distribution of exoplanet radii, which separates smaller super-Earths from larger sub-Neptunes, is a key feature that theoretical models must explain. Conventionally, it is interpreted as the resul...
Mediation of collisionless turbulent dissipation through cyclotron resonance [0.03%]
无碰撞湍流耗散的回旋共振调解机制研究
Trevor A Bowen,Stuart D Bale,Benjamin D G Chandran et al.
Trevor A Bowen et al.
The dissipation of turbulence in astrophysical systems is fundamental to energy transfer and heating in environments ranging from the solar wind and corona to accretion disks and the intracluster medium. Although turbulent dissipation is re...
Newly formed dust within the circumstellar environment of SN Ia-CSM 2018evt [0.03%]
SN Ia-CSM 2018evt 星周环境中新形成的尘埃
Lingzhi 灵芝 Wang王,Maokai Hu,Lifan Wang et al.
Lingzhi 灵芝 Wang王 et al.
Dust associated with various stellar sources in galaxies at all cosmic epochs remains a controversial topic, particularly whether supernovae play an important role in dust production. We report evidence of dust formation in the cold, dense ...