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A deep X-ray spectral imaging of the bow-shock pulsar wind nebula associated with PSR B1929+10
Takata, J.; Hui, C. Y.; Lin, L. C. C. +3 more
In this work, we study the X-ray bow-shock nebula powered by the mature pulsar PSR B1929+10 using data from XMM-Newton, with an effective exposure of ∼300 ks, offering the deepest investigation of this system thus far. We found the X-ray axial outflow extends as long as ∼8 arc minute behind the proper motion direction, which is a factor of two lon…
Estimates of Extragalactic Background and Confusion Noise Parameters for the Millimetron Telescope
Pilipenko, S. V.; Ermash, A. A.; Lukash, V. N.
The sensitivity of future far-infrared telescopes, such as Millimetron, will be limited by the confusion noise produced by distant galaxies. We have constructed a model of the cosmic infrared background whose main goal is to investigate the confusion noise parameters. The model is based on the publicly accessible eGALICS simulation. For each galax…
Tomography of cool giant and supergiant star atmospheres. III. Validation of the method on VLTI/AMBER observations of the Mira star S Ori
Anderson, Richard I.; Kravchenko, Kateryna; Chiavassa, Andrea +5 more
Context. Asymptotic giant branch (AGB) stars are characterized by substantial mass loss, however the mechanism behind it not yet fully understood. The knowledge of the structure and dynamics of AGB-star atmospheres is crucial to better understanding the mass loss. The recently established tomographic method, which relies on the design of spectral …
Distinct Accretion Modes of Cygnus X-1 Revealed from Hard X-Rays
Zdziarski, Andrzej A.; Lubiński, Piotr; Pooley, Guy +1 more
Thanks to recurrent observations of the black hole binary Cyg X-1 carried out over 15 years the INTEGRAL satellite has collected the largest data set in the hard X-ray band for this source. We have analyzed these data, complemented by data collected by other X-ray satellites and radio flux at 15 GHz. To characterize the spectral and variability pr…
The rotation-activity relation of M dwarfs: From K2 to TESS and PLATO
Stelzer, Beate; Scholz, Alexander; Raetz, Stefanie
Studies of the rotation-activity relation of late-type stars are essential to enhance our understanding of stellar dynamos and angular momentum evolution. We study the rotation-activity relation with K2 for M dwarfs, where it is especially poorly understood. We analyzed the light curves of all bright and nearby M dwarfs form the Superblink proper …
Searching for eclipsing binaries in the area of RA: 02h21m36s, Dec: +57○11'32″
Li, Kai; Gao, Xing; Sun, Guo-You +5 more
By analysing the data observed by the Comet Search Programme telescope at Xingming Observatory from 2018 October 11 to 2018 December 19, 24 eclipsing binaries were identified. By cross-matching with the VSX (AAVSO) website, we found that four binaries are newly discovered. By analysing the Transiting Exoplanet Survey Satellite (TESS) data, the lig…
An Extremely Bright QSO at z = 2.89
Stern, Daniel; Gonzalez, Anthony; Ackley, Kendall +4 more
We report the discovery and confirmation of a bright quasi-stellar object (QSO), 2MASS J13260399 + 7023462, at $z=2.889$ . This QSO is the first spectroscopically confirmed candidate from an ongoing search using the combination of Gaia and Wide-field Infrared Survey Explorer photometry to identify bright QSOs at z > 2, the redshift regime for w…
Learning Spectral Templates for Photometric Redshift Estimation from Broadband Photometry
Connolly, Andrew J.; Crenshaw, John Franklin
Estimating redshifts from broadband photometry is often limited by how accurately we can map the colors of galaxies to an underlying spectral template. Current techniques utilize spectrophotometric samples of galaxies or spectra derived from spectral synthesis models. Both of these approaches have their limitations: either the sample sizes are sma…
An Asymmetric Eclipse Seen toward the Pre-main-sequence Binary System V928 Tau
Schlieder, Joshua E.; Howard, Andrew W.; Stauffer, John R. +21 more
K2 observations of the weak-lined T Tauri binary V928 Tau A and B show the detection of a single, asymmetric eclipse, which may be due to a previously unknown substellar companion eclipsing one component of the binary with an orbital period >66 days. Over an interval of about 9 hr, one component of the binary dims by around 60%, returning to it…
Bolometric bond albedo and thermal inertia maps of Mimas
Spencer, J. R.; Howett, C. J. A.; Nordheim, T. A.
In 2011 a thermally anomalous region was discovered on Mimas, Saturn's innermost major icy satellite (Howett et al., 2011). The anomalous region is a lens-like shape located at low latitudes on Mimas' leading hemisphere. It manifests as a region with warmer nighttime temperatures, and cooler daytime ones than its surroundings. The thermally anomal…