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Star-by-star dynamical evolution of the physical pair of the Collinder 135 and UBC 7 open clusters
Berczik, Peter; Just, Andreas; Kovaleva, Dana A. +8 more
Context. In a previous paper using Gaia DR2 data, we demonstrated that the two closely situated open clusters Collinder 135 and UBC 7 might have formed together about 50 Myr ago.
Aims: In this work, we performed star-by-star dynamical modelling of the evolution of the open clusters Collinder 135 and UBC 7 from their supposed initial state to …
Optical Transient Source AT2021lfa: A Possible "Dirty Fireball"
Jin, Zhi-Ping; Wei, Da-Ming; Ye, Xue-Mei +1 more
AT2021lfa, also known as ZTF21aayokph, was detected by the Zwicky Transient Facility on 2021 May 4, at 05:34:48 UTC. Follow-up observations were conducted using a range of ground-based optical telescopes, as well as Swift/XRT and VLA instruments. AT2021lfa is classified as an "orphan afterglow" candidate due to its rapid flux decline and its redde…
Axial Flux Evolution of Small-scale Magnetic Flux Ropes from 0.06 to 10 au
Wang, Haimin; Kim, Hyomin; Lee, Jeongwoo +2 more
Small-scale magnetic flux ropes (SMFRs) fill much of the solar wind, but their origin and evolution are debated. We apply our recently developed, improved Grad–Shafranov algorithm for the detection and reconstruction of SMFRs to data from Parker Solar Probe, Solar Orbiter, Wind, and Voyager 1 and 2 to detect events from 0.06 to 10 au. We observe t…
MeerKAT observations of starburst galaxies and AGNs within the core of XMMXCS J2215.9-1738 at z = 1.46
Smail, I.; Heywood, I.; Swinbank, A. M. +4 more
We present the first detailed radio study of the galaxy cluster XMMXCS J2215.9-1738 at z = 1.46 using MeerKAT L-band (1.3 GHz) observations. We combine our radio observation with archival optical and infrared data to investigate the star formation and active galactic nucleus (AGN) population within $R_{200}$ ($R =$ 0.8 Mpc) of the cluster centre. …
The Radcliffe wave as traced by young open clusters: Stellar parameters, activity indicators, and abundances of solar-type members of eight young clusters
Vallenari, A.; Bragaglia, A.; Frasca, A. +7 more
The Radcliffe wave has only recently been recognised as a ≈3 kpc long coherent gas structure encompassing most of the star-forming regions in the solar vicinity. Since its discovery, it has been mainly studied from the perspective of dynamics, but a detailed chemical study is necessary to understand its nature and the composition of the natal clou…
DIAmante TESS AutoRegressive Planet Search (DTARPS). III. Understanding the DTARPS-S Candidate Transiting Planet Catalogs
Feigelson, Eric D.; Montalto, Marco; Melton, Elizabeth J. +3 more
The DIAmante Transiting Exoplanet Sky Survey (TESS) AutoRegressive Planet Search (DTARPS) project, using novel statistical methods, has identified several hundred candidates for transiting planetary systems obtained from 0.9 million full-frame Image light curves obtained in the TESS Year 1 southern-hemisphere survey. Ten lines of evidence includin…
Sinuous Aurora at Mars: A Link to the Tail Current Sheet?
Ramstad, Robin; Lillis, Robert J.; Deighan, Justin +18 more
We examine the newly discovered phenomena of sinuous aurora on the nightside of Mars, using images of 130.4 and 135.6 nm oxygen emission measured by the Emirates Mars Mission EMUS ultraviolet spectrograph, and upstream measurements from the MAVEN and Mars Express spacecraft. They are detected in ∼3% of observations, totaling 73 clear detections. T…
Toward Precision Cosmology with Improved Planetary Nebula Luminosity Function Distances Using VLT-MUSE. II. A Test Sample from Archival Data
Weilbacher, Peter M.; Roth, Martin M.; Ciardullo, Robin +2 more
Thanks to the MUSE integral field spectrograph on board the Very Large Telescope (VLT), extragalactic distance measurements with the [O III] λ5007 planetary nebula luminosity function (PNLF) are now possible out to ∼40 Mpc. Here we analyze the VLT/MUSE data for 20 galaxies from the ESO public archive to identify the systems' planetary nebulae (PNe…
Probing the Distinct Extinction Law of the Pillars of Creation in M16 with JWST
Gao, Jian; Chen, Xi; Jiang, Biwei +2 more
Investigating the extinction law in regions of high dust extinction, such as the Pillars of Creation within the M16 region, is crucial for understanding the densest parts of the interstellar medium (ISM). In this study, we utilize observations from the Near-Infrared Camera and the Mid-Infrared Instrument onboard the James Webb Space Telescope (JWS…
The Reliability of Accretion Disk Inclination Derived from X-Ray Spectroscopy of Active Galaxies
Ho, Luis C.; Li, Ruancun; Ding, Yuanze +1 more
The inclination angle of substructures in active galaxies gives insights into physical components from scales of the vicinity of the central black hole to the entire host galaxy. We use the self-consistent reflection spectral model RELXILL to measure the inclination of the inner region of accretion disks with broadband (0.3–78 keV) X-ray observati…