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The Role of Kinetic Instabilities and Waves in Collisionless Magnetic Reconnection
Khotyaintsev, Yu. V.; Graham, D. B.; Steinvall, K. +13 more
Magnetic reconnection converts magnetic field energy into particle energy by breaking and reconnecting magnetic field lines. Magnetic reconnection is a kinetic process that generates a wide variety of kinetic waves via wave-particle interactions. Kinetic waves have been proposed to play an important role in magnetic reconnection in collisionless p…
A catalogue of binary stars from phase modulation in the first four years of TESS mission photometry
Murphy, Simon J.; Huang, Chelsea X.; Wright, Duncan +2 more
We present a catalogue of binary companions to
The VELOCE modulation zoo: II. Humps and splitting patterns in spectral lines of classical Cepheids
Anderson, R. I.; Netzel, H.; Viviani, G.
Context. Line splitting in spectral lines is observed in various types of stars due to phenomena such as shocks, spectroscopic binaries, magnetic fields, spots, and nonradial modes. In pulsating stars, line splitting is often attributed to pulsation-induced shocks. However, this is rarely observed in classical Cepheids, with only a few reports; th…
VLTI/GRAVITY upper limit on near-infrared emission from the nearby 33 M⊙ black hole Gaia BH3
Mérand, Antoine; Le Bouquin, Jean-Baptiste; Mazeh, Tsevi +11 more
Context. The recent astrometric discovery of the nearby (590 pc) massive (33 M⊙) dormant black hole candidate Gaia BH3 offers the possibility to angularly resolve the black hole from its companion star by using optical interferometry. Aims. Our aim is to detect emission in the near-infrared K band from the close-in environment of Gaia B…
Quantifying the Contamination from nearby Stellar Companions in Gaia DR3 Photometry
Huber, Daniel; Berger, Travis A.; Kraus, Adam L. +1 more
Identifying and removing binary stars from stellar samples is a crucial but complicated task. Regardless of how carefully a sample is selected, some binaries will remain and complicate interpretation of results, especially via flux contamination of survey photometry. One such sample is the data from the Gaia spacecraft, which is collecting photome…
Confirmation of the planetary nebula nature of HaTr 5: Not a remnant of Nova Sco 1437
Ritter, A.; Guerrero, M. A.; Toalá, J. A. +6 more
Context. The identification of the nebula HaTr 5 with the shell remnant of the historic Nova Sco 1437 around the low-accretion rate cataclysmic variable 2MASS J17022815-4306123 has been used in the framework of the hibernation scenario to set an upper limit of ≤580 yr on the transition time from a nova-like binary to a dwarf nova. Aims. This work …
Astronomaly Protege: Discovery through Human-machine Collaboration
Rudnick, Lawrence; Lochner, Michelle
Modern telescopes generate catalogs of millions of objects with the potential for new scientific discoveries, but this is beyond what can be examined visually. Here we introduce ASTRONOMALY: PROTEGE, an extension of the general-purpose machine-learning-based active anomaly detection framework ASTRONOMALY. PROTEGE is designed to provide well-select…
Two methods for determining the temperature on the surface of the cometary nucleus based on spectroscopic measurements
Wesołowski, Marcin; Potera, Piotr; Kucab, Krzysztof
The paper presents two methods that can be used to determine the surface temperature of a cometary nucleus. The key role in this approach is played by the measurement of hemispherical albedo for selected dust analogues, which was performed using a Cary 5000 spectrometer. To most accurately reflect the actual structure of the dust layer present on …
Thirty-five Years of Timing of M53A with Arecibo and FAST
Cadelano, Mario; Pallanca, Cristina; Qian, Lei +6 more
PSR B1310+18A is a 33 ms binary pulsar in a 256 day, low eccentricity orbit with a low-mass companion located in NGC 5024 (M53). In this Letter, we present the first phase-coherent timing solution for this pulsar (designated as M53A) derived from a 35 yr timing baseline; this combines the archival Arecibo Observatory data with the recent observati…
Kinematics of Cataclysmic Variables in the Solar Neighborhood in the Gaia Era
Bilir, Selçuk; Canbay, Remziye; AK, Tansel +2 more
Using high-precision astrometric data from Gaia DR3 and updated systemic velocities from the literature, the kinematical properties of cataclysmic variables (CVs) were investigated. By constraining the data according to the total space velocity error and Galactic population class, a reliable sample of data was obtained. Nonmagnetic CVs located in …