Search Publications
Collimation of the kiloparsec-scale radio jets in NGC 2663
Salvato, M.; Nandra, K.; Filipović, M. D. +25 more
We present the discovery of highly collimated radio jets spanning a total of 355 kpc around the nearby elliptical galaxy NGC 2663, and the possible first detection of recollimation on kiloparsec scales. The small distance to the galaxy (~28.5 Mpc) allows us to resolve portions of the jets to examine their structure. We combine multiwavelength data…
Blanco DECam Bulge Survey (BDBS). VII. Multiple Populations in Globular Clusters of the Galactic Bulge
Clarkson, William I.; Rich, R. Michael; Kunder, Andrea +9 more
We present photometric evidence for multiple stellar populations (MPs) in 14 globular clusters (GCs) toward the southern Galactic bulge. The photometric data come as part of the Blanco DECam Bulge Survey, which is a deep, wide-field near-UV-near-IR (ugrizY) survey of the southern Galactic bulge. Here, we present the first systematic study of bulge…
A Dearth of Close-in Planets around Rapidly Rotating Stars or a Dearth of Data?
De Medeiros, J. R.; Leão, I. C.; Canto Martins, B. L. +4 more
A dearth of close-in planets orbiting rapid rotators was reported almost a decade ago. According to this view, only slowly spinning stars with rotation periods longer than 5-10 days would host planets with orbital periods shorter than 2 or 3 days. This Letter brings an enlarged and more detailed analysis that led us to the question: Is there reall…
A Low-mass Pre-main-sequence Eclipsing Binary in Lower Centaurus Crux Discovered with TESS
Torres, Guillermo; Feliz, Dax L.; Stassun, Keivan G. +5 more
We report the discovery of 2M1222-57 as a low-mass, pre-main-sequence (PMS) eclipsing binary (EB) in the Lower Centaurus Crux (LCC) association for which, using Gaia parallaxes and proper motions with a neural net age estimator, we determine an age of 16.2 ± 2.2 Myr. The broadband spectral energy distribution (SED) shows clear excess at ≳10 µ…
Classifying IGR J18007-4146 as an intermediate polar using XMM and NuSTAR
Hare, Jeremy; Mukai, Koji; Fornasini, Francesca M. +5 more
Many new and unidentified Galactic sources have recently been revealed by ongoing hard X-ray surveys. A significant fraction of these have been shown to be the type of accreting white dwarfs known as cataclysmic variables (CVs). Follow-up observations are often required to categorize and classify these sources, and may also identify potentially un…
How are Lyα Absorbers in the Cosmic Web Related to Gas-rich Galaxies?
Borthakur, Sanchayeeta
We present the correlation between Lyα absorbers and H I galaxies in the nearby universe (0.01 ≤ z ≤ 0.057). We find that Lyα absorbers are strongly correlated to H I galaxies at a projected separation of ≤0.5 Mpc and velocity separation of ≤50 km s-1. Lyα absorbers are 7.6 times more likely to be found near H I galaxies compared to a r…
Influence of Titan's Variable Electromagnetic Environment on the Global Distribution of Energetic Neutral Atoms
Simon, Sven; Tippens, Tyler; Liuzzo, Lucas
We combine the electromagnetic fields from a hybrid plasma model with a particle tracing tool to study the spatial distribution of energetic neutral atoms (ENAs) emitted from Titan's atmosphere when the moon is exposed to different magnetospheric upstream regimes. These ENAs are generated when energetic magnetospheric ions undergo charge exchange …
Orphan optical flare as SOSS emission afterglow, localization in time
Zhirkov, K.; Gorbovskoy, E.; Serra-Ricart, M. +24 more
We report on MASTER optical observations of an afterglow-like optical and X-ray transient AT2021lfa/ZTF21aayokph. We detected the initial steady brightening of the transient at 7σ confidence level. This allowed us to use smooth optical self-similar emission of GRBs model to constrain the explosion time to better than 14 min as well as to estimate …
Vertical Aerosol Distribution and Mesospheric Clouds From ExoMars UVIS
Vandaele, Ann Carine; Daerden, Frank; Ristic, Bojan +12 more
The vertical opacity structure of the martian atmosphere is important for understanding the distribution of ice (water and carbon dioxide) and dust. We present a new data set of extinction opacity profiles from the NOMAD/UVIS spectrometer aboard the ExoMars Trace Gas Orbiter, covering one and a half Mars Years (MY) including the MY 34 Global Dust …
Forbush decreases caused by paired interacting solar wind disturbances
Belov, A. V.; Abunina, M. A.; Abunin, A. A. +3 more
The paper discusses changes in various characteristics of the solar wind, interplanetary magnetic field, geomagnetic activity, and cosmic rays during the registration of paired interacting solar wind disturbances on the Earth using the data base of Forbush effects and interplanetary disturbances - FEID. The cases of pair interaction are considered…