Search Publications
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…
The Extremely Luminous Quasar Survey in the Pan-STARRS 1 Footprint (PS-ELQS)
Hall, Patrick B.; Fan, Xiaohui; Huang, Yun-Hsin +7 more
We present the results of the Extremely Luminous Quasar Survey in the 3π survey of the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS; PS1). This effort applies the successful quasar selection strategy of the Extremely Luminous Survey in the Sloan Digital Sky Survey footprint (∼12,000 deg2) to a much larger area (∼21,4…
Discovery of a nitrogen-enhanced mildly metal-poor binary system: Possible evidence for pollution from an extinct AGB star
Beers, Timothy C.; Placco, Vinicius M.; Robin, Annie C. +12 more
We report the serendipitous discovery of a nitrogen-rich, mildly metal-poor ([Fe/H] = -1.08) giant star in a single-lined spectroscopic binary system found in the SDSS-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) survey, Data Release 14 (DR14). Previous work has assumed that two percent of halo giants with unusual elemental…
Signatures of an eruptive phase before the explosion of the peculiar core-collapse SN 2013gc
Reichart, D. E.; Smartt, S. J.; Olivares E., F. +12 more
We present photometric and spectroscopic analysis of the peculiar core-collapse supernova (SN) 2013gc, spanning 7 yr of observations. The light curve shows an early maximum followed by a fast decline and a phase of almost constant luminosity. At +200 d from maximum, a brightening of 1 mag is observed in all bands, followed by a steep linear lumino…
Spectral and spatial analysis of the dark matter subhalo candidates among Fermi Large Area Telescope unidentified sources
Ciucă, Ioana; Kawata, Daisuke; Domínguez, Alberto +5 more
Fermi-LAT unidentified sources (unIDs) have proven to be compelling targets for performing indirect dark matter (DM) searches. In a previous work, we found that among the 1235 unIDs in Fermi-LAT's catalogs (3FGL, 2FHL and 3FHL) only 44 of those are DM subhalos candidates. We now implement a spectral analysis to test whether these remaining sources…
New near-infrared JHKs light-curve templates for RR Lyrae variables
Minniti, D.; Walker, A. R.; Mateo, M. +35 more
We provide homogeneous optical (UBVRI) and near-infrared (NIR, JHK) time series photometry for 254 cluster (ω Cen, M 4) and field RR Lyrae (RRL) variables. We ended up with more than 551 000 measurements, of which only 9% are literature data. For 94 fundamental (RRab) and 51 first overtones (RRc) we provide a complete optical/NIR characterization …