Search Publications
Discovery of an inflated hot Jupiter around a slightly evolved star TOI-1789
Howell, Steve B.; Fridlund, Malcolm; Guenther, Eike W. +11 more
We report here the discovery of a hot Jupiter at an orbital period of 3.208664 ± 0.000015 d around TOI-1789 (TYC 1962-00303-1, TESSmag = 9.1) based on the TESS photometry, ground-based photometry, and high-precision radial velocity (RV) observations. The high-precision RV observations were obtained from the high-resolution spectrographs…
WiNDS: An H α Kinematics Survey of Nearby Spiral Galaxies-Vertical Perturbations in Nearby Disk-type Galaxies
Monachesi, Antonela; Amram, Philippe; Gómez, Facundo A. +5 more
We present the Waves in Nearby Disk galaxies Survey (WiNDS) consisting of 40 nearby low-inclination disk galaxies observed through H α high-resolution Fabry-Perot interferometry. WiNDS consists of 12 new galaxy observations and 28 data archived observations obtained from different galaxy surveys. We derive two-dimensional line-of-sight…
fBLS - a fast-folding BLS algorithm
Mazeh, T.; Faigler, S.; Shahaf, S. +2 more
We present fBLS - a novel fast-folding technique to search for transiting planets, based on the fast-folding algorithm (FFA), which is extensively used in pulsar astronomy. For a given light curve with N data points, fBLS simultaneously produces all the binned phase-folded light curves for an array of Np trial periods. For each folded l…
The multichord stellar occultation on 2019 October 22 by the trans-Neptunian object (84922) 2003 VS2
Derekas, A.; Szigeti, L.; Souami, D. +60 more
Context. Stellar occultations have become one of the best techniques to gather information about the physical properties of trans-Neptunian objects (TNOs), which are critical objects for understanding the origin and evolution of our Solar System.
Aims: The purpose of this work is to determine, with better accuracy, the physical characteristic…
Mitigating the effects of particle background on the Athena Wide Field Imager
Miller, Eric D.; Kraft, Ralph; Gastaldello, Fabio +16 more
The Wide Field Imager (WFI) flying on Athena will usher in the next era of studying the hot and energetic Universe. Among Athena's ambitious science programs are observations of faint, diffuse sources limited by statistical and systematic uncertainty in the background produced by high-energy cosmic ray particles. These particles produce easily ide…
First optical identification of the SRG/eROSITA-detected supernova remnant G 116.6 - 26.1. I. Preliminary results
Palaiologou, E. V.; Leonidaki, I.; Kopsacheili, M.
The supernova remnant (SNR) candidate G 116.6 - 26.1 is one of the few high Galactic latitude (|b| > 15°) remnants detected so far in several wavebands. It was discovered recently in the SRG/eROSITA all-sky X-ray survey and also displays a low-frequency weak radio signature. In this study, we report the first optical detection of G 116.6 - 26.1…
Comparison of machine learning algorithms used to classify the asteroids observed by all-sky surveys
Carry, B.; Penttilä, A.; Klimczak, H. +4 more
Context. Multifilter photometry from large sky surveys is commonly used to assign asteroid taxonomic types and study various problems in planetary science. To maximize the science output of those surveys, it is important to use methods that best link the spectro-photometric measurements to asteroid taxonomy.
Aims: We aim to determine which ma…
X-ray variability of transitional millisecond pulsars: a faint, stable, and fluctuating disc
Wijnands, Rudy; Linares, Manuel; van der Klis, Michiel +1 more
Transitional millisecond pulsars (tMSPs) have emerged in the last decade as a unique class of neutron stars at the crossroads between accretion- and rotation-powered phenomena. In their (sub-luminous) accretion disc state, with X-ray luminosities of order 1033-1034 erg s-1, they switch rapidly between two distinct …
Observations of multiple NH3 transitions in W33
Immer, K.; Henkel, C.; Wilson, T. L. +10 more
At a distance of 2.4 kpc, W33 is an outstanding massive and luminous 10 pc-sized star forming complex containing quiescent infrared dark clouds as well as highly active infrared bright cloud cores heated by young massive stars. We report measurements of ammonia (NH3) inversion lines in the frequency range 18-26 GHz obtained with the 40"…
Machine learning-based search for cataclysmic variables within Gaia Science Alerts
Copperwheat, C. M.; Darnley, M. J.; Mistry, D. +1 more
Wide-field time domain facilities detect transient events in large numbers through difference imaging. For example, Zwicky Transient Facility produces alerts for hundreds of thousands of transient events per night, a rate set to be dwarfed by the upcoming Vera C. Rubin Observatory. The automation provided by machine learning (ML) is therefore nece…