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Circumgalactic Environments Around Distant Quasars 3C 9 and 4C 05.84
Kriek, Mariska; Armus, Lee; Wright, Shelley A. +6 more
We present results from the Quasar hosts Unveiled by high Angular Resolution Techniques survey studying the circumgalactic medium (CGM) by observing rest-frame UV emission lines Lyα, C IV, and He II around two radio-loud quasars, 3C 9 (z = 2.02) and 4C 05.84 (z = 2.32), using the Keck Cosmic Web Imager. We detect large-scale Lyα nebulae around bot…
The variation in the response of solar full-disc magnetographs
Solanki, S. K.; Yeo, K. L.; Krivova, N. A.
Context. The utility of full solar disc magnetograms as a long-term record of the photospheric magnetic field requires an understanding of how stable these observations are with time and the systematic differences between the various instruments.
Aims: We compared magnetograms from the KPVT/SPM, SoHO/MDI, SOLIS/VSM, and SDO/HMI with the aim o…
KMT-2021-BLG-2609Lb and KMT-2022-BLG-0303Lb: Microlensing planets identified through signals produced by major-image perturbations
Han, Cheongho; Lee, Chung-Uk; Zang, Weicheng +18 more
Aims. We investigate microlensing data collected by the Korea Microlensing Telescope Network (KMTNet) survey during the 2021 and 2022 seasons to identify planetary lensing events displaying a consistent anomalous pattern. Our investigation reveals that the light curves of two lensing events, KMT-2021-BLG-2609 and KMT-2022-BLG-0303, exhibit a simil…
A photometric and spectroscopic study of eight semi-detached eclipsing binaries
Wang, Liang; Li, Kai; Yi, Tuan +3 more
Context. Semi-detached eclipsing binaries offer an exceptional opportunity to validate the evolutionary models of interacting binaries. This entails determining the absolute parameters and evaluating the evolutionary status of the binary components through simultaneous analysis of both light and radial velocity curves. The Transiting Exoplanet Sur…
Subkiloparsec Scaling Relations between Hot Gas, Dense Gas, and Star Formation Rate in Five Nearby Star-forming Galaxies
Gao, Yu; Tan, Qing-Hua; Wang, Junfeng +3 more
Based on the newly acquired dense gas observations from the JCMT MALATANG survey and X-ray data from Chandra, we explore the correlation between hot gas and HCN J = 4 → 3 and HCO+ J = 4 → 3 emission for the first time at subkiloparsec scale of five nearby star-forming galaxies, namely M82, M83, IC 342, NGC 253, and NGC 6946. We find tha…
On stellar migration from Andromeda to the Milky Way
Schwarz, Dominik J.; Fairbairn, Malcolm; Gülzow, Lukas
Recent Gaia observations suggest that some hypervelocity stars (HVSs) might originate from outside the Galaxy. We ask whether these HVSs could come from as far as Andromeda. Therefore, we simulate HVSs originating in Andromeda with initial conditions based on attributes of high-velocity stars measured in the Milky Way and a simple model for the gr…
On the Global Features of the 10-60-Min ULF Waves in Jovian Magnetosphere: Juno Observations
Bonfond, B.; Xu, Y.; Fu, S. Y. +8 more
In the Jovian magnetosphere, quasi-periodic phenomena, with quasi-periods on the order of 10-60 min, are frequently identified using different data sets. These pulsations are a branch of ultra-low frequency (ULF) waves, which are believed to play a crucial role in driving the energy circulation within Jupiter's magnetosphere. In this study, we uti…
The unexpected role of heliospheric boundaries in facilitating interstellar dust penetration at 1-5 AU
Izmodenov, V. V.; Godenko, E. A.
Aims: Interstellar dust (ISD) particles penetrate the heliosphere because of the relative motion of the local interstellar cloud and the Sun. The penetrated particles pass through the heliospheric interface, that is, the region in which solar wind and interstellar plasma interact. As a result, the ISD flow is modified after the passage throug…
DULAG: A DUal and Lensed AGN candidate catalog with the Gaia multipeak method
Liao, S.; Mannucci, F.; Qi, Z. +2 more
Context. A series of studies have demonstrated that the Gaia multipeak (GMP) method is a very efficient technique for selecting active galactic nucleus (AGN) pair candidates. The number of candidates is determined by the size of the input AGN catalog, and is usually limited to spectroscopically confirmed objects. Aims. The objective of this work i…
Long-term orbital evolution of dimorphos boulders and implications on the origin of meteorites
Carbognani, A.; Fenucci, M.
By using recent observations of the Dydimos-Dimorphos system from the Hubble Space Telescope, 37 boulders with a size of 4 to 7 m ejected from the system during the impact with the DART spacecraft were identified. In this work, we studied the orbital evolution of a swarm of boulders with a similar size to that of the detected ones. By using recent…