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The "Singular" Behavior of the Solar Wind Scaling Features during Parker Solar Probe-BepiColombo Radial Alignment
Richter, Ingo; Auster, Hans-Ulrich; Hadid, Lina Z. +4 more
At the end of 2020 September, the Parker Solar Probe (PSP) and BepiColombo were radially aligned: PSP was orbiting near 0.17 au and BepiColombo near 0.6 au. This geometry is of particular interest for investigating the evolution of solar wind properties at different heliocentric distances by observing the same solar wind plasma parcels. In this wo…
The Initial-Final Mass Relation of White Dwarfs: A Tool to Calibrate the Third Dredge-Up
Marigo, Paola
The initial mass-final mass relationship (IFMR) of white dwarfs (WD) represents a crucial benchmark for stellar evolution models, especially for the efficiency of mixing episodes and mass loss during the asymptotic giant branch (AGB) phase. In this study, we argue that this relation offers the opportunity to constrain the third dredge-up (3DU), wi…
The magnetic field and magnetosphere of Plaskett's star: a fundamental shift in our understanding of the system
Wade, G. A.; Neiner, C.; Alecian, E. +7 more
Plaskett's 'star' appears to be one of a small number of short-period binary systems known to contain a hot, massive, magnetic star. We combine an extensive spectropolarimetric (Stokes V) data set with archival photometry and spectropolarimetry to establish the essential characteristics of the magnetic field and magnetosphere of the rapidly rotati…
X-ray timing and spectral variability properties of blazars S5 0716 + 714, OJ 287, Mrk 501, and RBS 2070
Mohorian, Maksym; Bhatta, Gopal; Adhikari, Tek P. +6 more
The X-ray emission from blazars has been widely investigated using several space telescopes. In this work, we explored statistical properties of the X-ray variability in the blazars S5 0716+714, OJ 287, Mkn 501, and RBS 2070 using the archival observations from the XMM-Newton telescope between the period 2002-2020. Several methods of timing and sp…
A Gaia View on the Star Formation in the Monoceros OB1 and R1 Associations
Lim, Beomdu; Lee, Jeong-Eun; Park, Byeong-Gon +5 more
Stellar kinematics provides the key to understanding the star formation process. In this respect, we present a kinematic study of the Monoceros OB1 (Mon OB1) and R1 (Mon R1) associations using the recent Gaia data and radial velocities of stars derived from high-resolution spectroscopy and the literature. A total of 728 members are selected using …
A Partial Filament Eruption in Three Steps Induced by External Magnetic Reconnection
Xu, Zhe; Li, Leping; Zhang, Qingmin +6 more
We present an investigation of partial filament eruption on 2012 June 17 in the active region NOAA 11504. For the first time, we observed the vertical splitting process during the partial eruption with high-resolution narrowband images at 10830 Å. The active filament was rooted in a small δ-sunspot of the active region. Particularly, it underwent …
The Lyman Alpha Reference Sample. XII. Morphology of extended Lyman alpha emission in star-forming galaxies
Östlin, G.; Hayes, M.; Kunth, D. +7 more
Aims: We use Hubble Space Telescope data of 45 nearby star-forming galaxies to investigate properties of Lyman-alpha (Lyα) halos, Lyα morphology, and the star-forming characteristics of galaxies. We study how the morphology of Lyα emission is related to other Lyα observables. Furthermore, we study the interdependencies of Lyα morphological qu…
The Influence of 10 Unique Chemical Elements in Shaping the Distribution of Kepler Planets
Cunha, Katia; Smith, Verne V.; Mahadevan, Suvrath +15 more
The chemical abundances of planet-hosting stars offer a glimpse into the composition of planet-forming environments. To further understand this connection, we make the first ever measurement of the correlation between planet occurrence and chemical abundances for ten different elements (C, Mg, Al, Si, S, K, Ca, Mn, Fe, and Ni). Leveraging data fro…
MARS: A New Maximum-entropy-regularized Strong Lensing Mass Reconstruction Method
Jee, M. James; Cha, Sangjun
Free-form strong-lensing (SL) mass reconstructions typically suffer from overfitting, which manifests itself as false-positive small-scale fluctuations. We present a new free-form MAximum-entropy ReconStruction (MARS) method without the assumption that light traces mass (LTM). The MARS algorithm enables us to achieve excellent convergence in sourc…
The Nascent Milliquasar VT J154843.06+220812.6: Tidal Disruption Event or Extreme Accretion State Change?
Hallinan, Gregg; Graham, Matthew; Lu, Wenbin +5 more
We present a detailed multiwavelength follow-up of the nuclear radio flare VT J154843.06+220812.6, hereafter VT J1548. VT J1548 was selected as a ~1 mJy radio flare in 3 GHz observations from the Very Large Array Sky Survey. It is located in the nucleus of a low-mass ( $\mathrm{log}{M}_{\mathrm{BH}}/{M}_{\odot }\sim 6$ ) host galaxy with weak or n…