Search Publications
Geomorphology of comet 67P/Churyumov-Gerasimenko
Soderblom, J. M.; Sierks, H.; Vincent, J. -B. +10 more
We present a global geomorphological map of comet 67P/Churyumov-Gerasimenko (67P/C-G) using data acquired by the Rosetta Orbiter's OSIRIS Narrow Angle Camera. The images used in our study were acquired between 2014 August and 2015 May, before 67P/C-G passed through perihelion. Imagery of the Southern hemisphere was included in our study, allowing …
The abundance of compact quiescent galaxies since z ∼ 0.6
Erben, Thomas; Hildebrandt, Hendrik; Huertas-Company, Marc +12 more
We set out to quantify the number density of quiescent massive compact galaxies at intermediate redshifts. We determine structural parameters based on I-band imaging using the Canada-France-Hawaii Telescope (CFHT) equatorial Sloan Digital Sky Survey (SDSS) Stripe 82 (CS82) survey (∼170 deg2) taking advantage of an exquisite median seein…
A search for tight hierarchical triple systems amongst the eclipsing binaries in the CoRoT fields
Klagyivik, P.; Borkovits, T.; Benkő, J. M. +5 more
We report a comprehensive search for hierarchical triple stellar system candidates amongst eclipsing binaries (EBs) observed by the CoRoT spacecraft. We calculate and check eclipse timing variation (ETV) diagrams for almost 1500 EBs in an automated manner. We identify five relatively short period Algol systems for which our combined light-curve an…
HIDES spectroscopy of bright detached eclipsing binaries from the Kepler field - II. Double- and triple-lined objects
Kambe, E.; Maehara, H.; Ratajczak, M. +6 more
We present the results of our spectroscopic observations of eight detached eclipsing binaries (DEBs), selected from the Kepler Eclipsing Binary Catalog. Radial velocities (RVs) were calculated from high-resolution spectra obtained with the HIgh-Dispersion Echelle Spectrograph (HIDES) spectrograph, attached to the 1.88-m telescope of the Okayama As…
An artificial neural network to discover hypervelocity stars: candidates in Gaia DR1/TGAS
Rossi, E. M.; Brown, A. G. A.; Kordopatis, G. +5 more
The paucity of hypervelocity stars (HVSs) known to date has severely hampered their potential to investigate the stellar population of the Galactic Centre and the Galactic potential. The first Gaia data release (DR1, 2016 September 14) gives an opportunity to increase the current sample. The challenge is the disparity between the expected number o…
Reaching the peak of the quasar spectral energy distribution - II. Exploring the accretion disc, dusty torus and host galaxy
Done, Chris; Elvis, Martin; McDowell, Jonathan C. +3 more
We continue our study of the spectral energy distributions (SEDs) of 11 active galactic nuclei (AGN) at 1.5 < z < 2.2, with optical-near-infrared (NIR) spectra, X-ray data and mid-IR photometry. In a previous paper, we presented the observations and models; in this paper, we explore the parameter space of these models. We first quantify unce…
Overdensities of SMGs around WISE-selected, ultraluminous, high-redshift AGNs
Tsai, Chao-Wei; Wright, Edward L.; Eisenhardt, Peter +9 more
We investigate extremely luminous dusty galaxies in the environments around Wide-field Infrared Survey Explorer (WISE)-selected hot dust-obscured galaxies (Hot DOGs) and WISE/radio-selected active galactic nuclei (AGNs) at average redshifts of z = 2.7 and 1.7, respectively. Previous observations have detected overdensities of companion submillimet…
Proper motions of collimated jets from intermediate-mass protostars in the Carina Nebula
Smith, Nathan; Bally, John; Reiter, Megan +1 more
We present proper motion measurements of 37 jets and HH objects in the Carina Nebula measured in two epochs of H α images obtained ∼10 yr apart with Hubble Space Telescope/Advanced Camera for Surveys (ACS). Transverse velocities in all but one jet are faster than ≳ 25 km s-1, confirming that the jet-like H α features identified in the f…
Periodic eclipses of the young star PDS 110 discovered with WASP and KELT photometry
Kochanek, C. S.; Stanek, K. Z.; Shappee, B. J. +28 more
We report the discovery of eclipses by circumstellar disc material associated with the young star PDS 110 in the Ori OB1a association using the SuperWASP and Kilodegree Extremely Little Telescope surveys. PDS 110 (HD 290380, IRAS 05209-0107) is a rare Fe/Ge-type star, an ∼10 Myr-old accreting intermediate-mass star showing strong infrared excess (…
Characterizing the evolving K -band luminosity function using the UltraVISTA, CANDELS and HUDF surveys
Mortlock, Alice; Dunlop, James S.; McLure, Ross J. +5 more
We present the results of a new study of the K-band galaxy luminosity function (KLF) at redshifts z ≤ 3.75, based on a nested combination of the UltraVISTA, Cosmic Assembly Near-infrared Deep Legacy Extragalactic Survey and HUDF surveys. The large dynamic range in luminosity spanned by this new data set (3-4 dex over the full redshift range) is su…