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A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2
Brown, A. G. A.; Messineo, M.
We investigate individual distances and luminosities of a sample of 889 nearby candidate red supergiants (RSGs) with reliable parallaxes (ϖ/σ ϖ > 4 and RUWE < 2.7) from Gaia Data Release 2 (DR2). The sample was extracted from the historical compilation of spectroscopically derived spectral types by Skiff, and consists of K-M sta…
Search for Nearby Earth Analogs. I. 15 Planet Candidates Found in PFS Data
Butler, R. Paul; Crane, Jeffrey D.; Thompson, Ian B. +6 more
The radial velocity (RV) method plays a major role in the discovery of nearby exoplanets. To efficiently find planet candidates from the data obtained in high-precision RV surveys, we apply a signal diagnostic framework to detect RV signals that are statistically significant, consistent in time, robust in the choice of noise models, and do not cor…
Simulating MOS science on the ELT: Lyα forest tomography
Kaper, L.; Yang, Y.; Gendron, E. +14 more
Mapping the large-scale structure through cosmic time has numerous applications in studies of cosmology and galaxy evolution. At z ≳ 2, the structure can be traced by the neutral intergalactic medium (IGM) by way of observing the Lyα forest towards densely sampled lines of sight of bright background sources, such as quasars and star-forming galaxi…
An Enormous Molecular Gas Flow in the RX J0821+0752 Galaxy Cluster
Fabian, A. C.; Combes, F.; McDonald, M. +6 more
We present recent Chandra X-ray observations of the RX J0821.0+0752 galaxy cluster, in addition to ALMA observations of the CO(1-0) and CO(3-2) line emission tracing the molecular gas in its central galaxy. All of the CO line emission, originating from a {10}10 {M}⊙ molecular gas reservoir, is located several kiloparsecs awa…
SDSS-IV/SPIDERS: A catalogue of X-ray selected AGN properties. Spectral properties and black hole mass estimates for SPIDERS SDSS DR14 type 1 AGN
Salvato, M.; Schulze, A.; Nandra, K. +7 more
This work presents the catalogue of optical spectral properties for all X-ray selected SPIDERS active galactic nuclei (AGN) up to SDSS DR14. SPIDERS (SPectroscopic IDentification of eROSITA Sources) is an SDSS-IV programme that is currently conducting optical spectroscopy of the counterparts to the X-ray selected sources detected in the ROSAT all-…
New photometric analysis of five exoplanets: CoRoT-2b, HAT-P-12b, TrES-2b, WASP-12b, and WASP-52b
Erdem, Ahmet; Öztürk, Oǧuz
We report 12, 11, 9, 10, and 8 new transit light curves of CoRoT-2b, HAT-P-12b, TrES-2b, WASP-12b, and WASP-52b, respectively, obtained at Çanakkale Onsekiz Mart University Observatory and TÜBİTAK National Observatory in 2016 and 2017. These transit light curves were analysed using JKTEBOP code. Planetary radii of CoRoT-2b, HAT-P-12b, TrES-2b, WAS…
The Most Massive galaxy Clusters (M2C) across cosmic time: link between radial total mass distribution and dynamical state
Arnaud, M.; Pratt, G. W.; Bartalucci, I. +2 more
We study the dynamical state and the integrated total mass profiles of 75 massive (M500 > 5 × 1014 M⊙) Sunyaev-Zeldovich(SZ)-selected clusters at 0.08 < z < 1.1. The sample is built from the Planck catalogue, with the addition of four SPT clusters at z > 0.9. Using XMM-Newton imaging observations, we ch…
The Planet Formation Potential around a 45 Myr Old Accreting M Dwarf
Hughes, A. Meredith; Murphy, Simon J.; Mamajek, Eric E. +1 more
Debris disk detections around M dwarfs are rare, and so far no gas emission has been detected from an M dwarf debris disk. This makes the 45 Myr old M dwarf WISE J080822.18-644357.3 a bit of a curiosity; it has a strong infrared excess at an age beyond the lifetime of a typical planet-forming disk, and also exhibits broad Hα emission consistent wi…
Weak-lensing shear measurement with machine learning. Teaching artificial neural networks about feature noise
Schrabback, T.; Hildebrandt, H.; Courbin, F. +3 more
Cosmic shear, that is weak gravitational lensing by the large-scale matter structure of the Universe, is a primary cosmological probe for several present and upcoming surveys investigating dark matter and dark energy, such as Euclid or WFIRST. The probe requires an extremely accurate measurement of the shapes of millions of galaxies based on imagi…
Linking surface morphology, composition, and activity on the nucleus of 67P/Churyumov-Gerasimenko
Lamy, P. L.; Bertaux, J. -L.; Shi, X. +37 more
Aims: The Rosetta space probe accompanied comet 67P/Churyumov-Gerasimenko for more than two years, obtaining an unprecedented amount of unique data of the comet nucleus and inner coma. This has enabled us to study its activity almost continuously from 4 au inbound to 3.6 au outbound, including the perihelion passage at 1.24 au. This work focu…