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The Transformative Journey of HD 93521
Gies, Douglas R.; Shepard, Katherine; Klement, Robert +1 more
HD 93521 is a massive, rapidly rotating star that is located about 1 kpc above the Galactic disk, and the evolutionary age for its estimated mass is much less than the time of flight if it was ejected from the disk. Here we present a reassessment of both the evolutionary and kinematical timescales for HD 93521. We calculate a time of flight of 39 …
Late Amazonian dike-fed distributed volcanism in the Tharsis volcanic province on Mars
Pieterek, Bartosz; Lagain, Anthony; Ciazela, Marta +1 more
Tharsis is the largest volcanic province on Mars and in the solar system. This region includes major volcanoes (Olympus Mons, Alba Mons, Arsia Mons, Pavonis Mons, and Ascraeus Montes) and hundreds of small volcanic cones and vents, whose origin is not yet fully understood. Although the main Tharsis' edifices plumbing system has been extensively st…
An Early Catalog of Planet-hosting Multiple-star Systems of Order Three and Higher
Cuntz, M.; Millard, M. J.; Luke, G. E. +2 more
We present a catalog (status 2022 July 1) of triple and higher-order systems identified containing exoplanets based on data from the literature, including various analyses. We explore statistical properties of the systems with a focus on both the stars and the planets. So far, about 30 triple systems and one to three quadruple systems, including (…
An 8.56 keV Absorption Line in the Hyperluminous X-Ray Source in NGC 4045: Ultrafast Outflow or Cyclotron Line?
Fürst, Felix; Middleton, Matthew J.; Walton, Dominic J. +5 more
We report on the discovery of an absorption line at $E={8.56}_{-0.11}^{+0.05}$ keV detected with a significance of >3.3σ in the NuSTAR and XMM-Newton spectra of a newly discovered hyperluminous X-ray source (L X > 1041 erg s-1) in the galaxy NGC 4045 at a distance of 32 Mpc. The source was first discovered se…
The Solar Internetwork. III. Unipolar versus Bipolar Flux Appearance
Cheung, M. C. M.; Gošić, M.; Bellot Rubio, L. R. +3 more
Small-scale internetwork (IN) magnetic fields are considered to be the main building blocks of quiet Sun magnetism. For this reason, it is crucial to understand how they appear on the solar surface. Here, we employ a high-resolution, high-sensitivity, long-duration Hinode/NFI magnetogram sequence to analyze the appearance modes and spatiotemporal …
Probing infrared excess connection with Li enhancement among red clump giants
Reddy, Bacham E.; Muthumariappan, C.; Mallick, Anohita
We have performed a search among low-mass red giants for finding evidence for merger scenario for triggering He-flash and subsequent Li enhancement. We chose a sample of red giants from GALAH survey with well-measured Li abundances, and near- and mid-IR fluxes from 2MASS and WISE surveys, respectively. The sample contains 418 cool red clump giants…
The far-infrared/radio correlation for a sample of strongly lensed dusty star-forming galaxies detected by Herschel
Massardi, M.; Enia, A. F. M.; Negrello, M. +6 more
We investigate the radio/far-infrared (FIR) correlation for a sample of 28 bright high-redshift (1 ≲ z ≲ 4) star-forming galaxies selected in the FIR from the Herschel-ATLAS fields as candidates to be strongly gravitationally lensed. The radio information comes either from high sensitivity dedicated Australia Telescope Compact Array observations a…
Search for primordial black hole dark matter with x-ray spectroscopic and imaging satellite experiments and prospects for future satellite missions
Santangelo, Andrea; Malyshev, Denys; Moulin, Emmanuel
Ultralight primordial black holes (PBHs) in the mass range of 1016- 1022 g are allowed by current observations to constitute a significant fraction, if not all, of the dark matter in the Universe. In this work, we present limits on ultralight, nonrotating PBHs which arise from the nondetection of the Hawking radiation signals…
Bayesian Inference in Single-line Spectroscopic Binaries with a Visual Orbit
Mendez, Rene A.; Clavería, Rubén M.; Orchard, Marcos E. +2 more
We present a Bayesian inference methodology for the estimation of orbital parameters on single-line spectroscopic binaries with astrometric data, based on the No-U-Turn sampler Markov chain Monte Carlo algorithm. Our approach is designed to provide a precise and efficient estimation of the joint posterior distribution of the orbital parameters in …
Properties and applications of a predicted population of runaway He-sdO/B stars ejected from single degenerate He-donor SNe
Geier, S.; Justham, S.; Neunteufel, P. +4 more
Context. Thermonuclear supernovae (SNe), a subset of which are the highly important SNe of Type Ia and Iax, are relatively poorly understood phenomena. One of the more promising scenarios leading up to the creation of a thermonuclear SN involves accretion of helium-rich material from a binary companion. Following the SN, the binary companion is th…