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WASP-92, WASP-93, and WASP-118: transit timing variations and long-term stability of the systems
Evans, Phil; Gajdoš, Pavol; Vaňko, Martin +8 more
We studied three exoplanetary systems with transiting planets: WASP-92, WASP-93, and WASP-118. Using ground-based photometric observations of WASP-92 and WASP-93 and Kepler-K2 observations of WASP-118, we redetermined the orbital and physical parameters of these planets. The precise times of all transits were determined. We constructed O-C diagram…
Exploring the Interstellar Medium Using an Asymmetric X-Ray Dust Scattering Halo
Li, Guangxing; Jin, Chichuan; Ponti, Gabriele +1 more
SWIFT J1658.2-4242 is an X-ray transient discovered recently in the Galactic plane, with severe X-ray absorption corresponding to an equivalent hydrogen column density of ∼2 × 1023 cm-2. Using new Chandra and XMM-Newton data, we discover a strong X-ray dust scattering halo around it. The halo profile can be well fitted by the…
Constraining X-Ray Coronal Size with Transverse Motion of AGN Ultra-fast Outflows
Tombesi, Francesco; Fukumura, Keigo
One of the canonical physical properties of ultra-fast outflows (UFOs) seen in a diverse population of active galactic nuclei is its seemingly very broad width (i.e., Δv ≳ 10,000 km s-1), a feature often required for X-ray spectral modeling. While unclear to date, this condition is occasionally interpreted and justified as internal turb…
Magnetic activities on active solar-type stars
Pandey, J. C.; Raj, A.; Savanov, I. S. +2 more
We present results obtained from the studies of magnetic activities on four solar-type stars (F-type star KIC 6791060, K-type star LO Peg, and two M-type planet-hosting stars K2-33 and EPIC 211901114) by using optical observations from several ground- and space-based telescopes. In this study, we investigate magnetic activities such as spot-topogr…
A multiwavelength study of filamentary cloud G341.244-00.265
Wang, Jun-Jie; Yu, Nai-Ping; Xu, Jing-Long
We present a multiwavelength study toward the filamentary molecular cloud G341.244-00.265, to investigate the physical and chemical properties, as well as star formation activities taking place therein. Our radio continuum and molecular line data were obtained from the Sydney University Molonglo Sky Survey (SUMSS), Atacama Pathfinder Experiment Te…
3D hydrodynamical models of point-symmetric planetary nebulae: the special case of H 1-67
Velázquez, P. F.; Peña, M.; Rechy-García, J. S.
We present 3D hydrodynamical simulations of a precessing jet with a time-dependent ejection velocity or a time-dependent ejection density, interacting with a circumstellar medium given by a dense, anisotropic, and slow AGB wind, forming a torus. We explore a set of configurations with different values for the precession angle and number of ejectio…
The Habitability of GJ 357D: Possible Climate and Observability
Pallé, E.; Kaltenegger, L.; Luque, R. +5 more
The GJ 357 system harbors three planets orbiting a bright, nearby M2.5V star at 9.44 pc. The innermost planet, GJ 357b (TOI-562.01), is a hot transiting Earth-sized planet with Earth-like density, which receives about 12 times the irradiation Earth receives from the Sun, and was detected using data from TESS. Radial velocities discovered two more …
A Fast Approximate Approach to Microlensing Survey Analysis
Pepper, Joshua; Khakpash, Somayeh; Penny, Matthew
Microlensing can be used to discover exoplanets of a wide range of masses with orbits beyond ∼1 au, and even free-floating planets. The Wide Field Infrared Survey Telescope (WFIRST) mission will use microlensing to discover approximately 1600 planets by monitoring ∼100 million stars to find ∼50,000 microlensing events. Modeling each microlensing e…
Spectral Properties of Heavily Obscured Seyfert Galaxies from the INTEGRAL All-Sky Survey
Sazonov, S. Yu.; Krivonos, R. A.; Semena, A. N.
We have investigated the X-ray spectral properties of the ten heavily obscured nearby ( z < 0.1) active galactic nuclei (AGNs) IGR J00256+6821, NGC 1194, CGCG 420-015, IGR J09253+6929, NGC 3281, NGC 4939, IGR J14175-4641, NGC 5643, NGC 5728, and ESO 137-G034 from the catalogue of hard X-ray sources detected during the INTEGRAL seven-year all-sk…
Exploring the multiphase medium in MKW 08: from the central active galaxy up to cluster scales
Ercan, E. N.; Bourdin, H.; Gaspari, M. +3 more
Context. The study of the brightest cluster galaxy (BCG) coronae embedded in noncool core (NCC) galaxy clusters is crucial to understand the BCG's role in galaxy cluster evolution as well as the activation of the self-regulated cooling and heating mechanism in the central regions of galaxy clusters.
Aims: We explore the X-ray properties of th…