Pulsar Timing Residuals and Angular Correlations from Ultralight Scalar Dark Matter and Non-Adiabatic Perfect Fluid Dark Matter
Ultralight scalar dark matter and non-adiabatic perfect fluid dark matter can induce distinctive signatures in pulsar timing residuals and angular correlations, which can be used to identify different types of dark matter in pulsar timing array observations.
Supernova Ejecta from Runaway Stars as a Potential Source of Super-Virial Absorption in the Circumgalactic Medium
Supernova ejecta from runaway stars above the Galactic disk can heat up to super-virial temperatures and produce the observed high column density absorption of highly ionized gas in the circumgalactic medium.
Disk-like Extraplanar Regions of Hot Emitting Gas in the Circumgalactic Medium of the Milky Way
The super-virial (∼10^7 K) and virial (∼10^6 K) temperature gas in the circumgalactic medium of the Milky Way occupy disk-like extraplanar regions, likely produced by stellar feedback in and around the Galactic disk.
超光度型超新星の前最大バンプを照らし出す:遅発ジェットと早期スパーク
超光度型超新星の前最大バンプの発光は、中心エンジンから放出されたジェットが超新星残骸に衝突することで生み出される。
Relativistic Jets Powering the Early Bumps in Superluminous Supernovae
A relativistic jet launched by a central engine, such as a magnetar or accreting black hole, can successfully break through the expanding supernova ejecta and power bright ultraviolet/optical emission lasting several days after the explosion, matching the observed "bumps" in the light curves of many superluminous supernovae.
Measurement of Low Oxygen-to-Iron Ratio in a Luminous Galaxy at the Earliest Cosmic Epoch (z > 10): Implications for Supernova Enrichment
The luminous galaxy GN-z11 at z = 10.60 exhibits a low oxygen-to-iron abundance ratio ([O/Fe] = -0.37+0.43-0.22), suggesting rapid iron enrichment by bright hypernovae and/or pair-instability supernovae in the early universe.
다파장 관측을 통한 태양 디스크 상의 코로나 홀 제트의 연구
IRIS와 SDO 관측을 통해 태양 코로나 홀 내에서 발생한 두 개의 소규모 제트를 상세히 분석하였다. 이 제트들은 다양한 온도 분포와 역학적 특성을 보였으며, 비대칭적인 스펙트럼 프로파일을 통해 에너지 방출 영역을 확인할 수 있었다.
Comprehensive Multiwavelength Analysis of On-Disk Coronal Hole Jets Observed with IRIS and SDO
This study presents a detailed multiwavelength analysis of two small-scale jets originating from an on-disk coronal hole, combining observations from the Interface Region Imaging Spectrograph (IRIS) and the Solar Dynamics Observatory (SDO). The analysis reveals the thermal and dynamic properties of the jets, including their temperature distributions, electron densities, Doppler velocities, and nonthermal velocities.
Spectro-Polarimetric Study of Accretion Geometry Evolution in the Neutron Star X-ray Binary XTE J1701-462
The polarization degree of the X-ray emission from the neutron star X-ray binary XTE J1701-462 decreases as the source evolves along the Z-track, indicating a shrinking of the Comptonizing corona.
중력파 및 고질량 X선 쌍성계에서 발견되는 블랙홀의 공통 기원
중력파 검출기와 전자기파 관측을 통해 발견된 블랙홀은 동일한 별진화 과정에서 기원한다.
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