Search Publications
Cosmology with the submillimetre galaxies magnification bias. Tomographic analysis
Bonavera, L.; González-Nuevo, J.; Migliaccio, M. +5 more
Context. High-z submillimetre galaxies can be used as a background sample for gravitational lensing studies thanks to their magnification bias. In particular, the magnification bias can be exploited in order to constrain the free parameters of a halo occupation distribution (HOD) model and some of the main cosmological parameters. A pseudo-tomogra…
V899 Mon: A Peculiar Eruptive Young Star Close to the End of Its Outburst
Pál, András; Ogłoza, Waldemar; Lee, Jeong-Eun +15 more
The eruptive young star V899 Mon shows characteristics of both FUors and EXors. It reached a peak brightness in 2010, then briefly faded in 2011, followed by a second outburst. We conducted multifilter optical photometric monitoring, as well as optical and near-infrared spectroscopic observations, of V899 Mon. The light curves and color-magnitude …
Spatial Variation in Strong Line Ratios and Physical Conditions in Two Strongly Lensed Galaxies at z 1.4
Momcheva, Ivelina; Brammer, Gabriel; Acharyya, Ayan +14 more
Upcoming space-based integral field spectrographs will enable spatially resolved spectroscopy of distant galaxies, including at the scale of individual star-forming regions (i.e., down to just tens of parsecs) in galaxies that have been strongly gravitationally lensed. In the meantime, there is only a very small set of lensed galaxies where such s…
EC 22536−5304: a lead-rich and metal-poor long-period binary
Heber, U.; Irrgang, A.; Dorsch, M. +2 more
Helium-burning hot subdwarf stars of spectral types O and B (sdO/B) are thought to be produced through various types of binary interactions. The helium-rich hot subdwarf star EC 22536−5304 was recently found to be extremely enriched in lead. Here, we show that EC 22536−5304 is a binary star with a metal-poor subdwarf F-type (sdF) companion. We per…
Morphological comparison of blocks in chaos terrains on Pluto, Europa, and Mars
Skjetne, Helle L.; Singer, Kelsi N.; Hynek, Brian M. +12 more
Chaotic terrains are characterized by disruption of preexisting surfaces into irregularly arranged mountain blocks with a "chaotic" appearance. Several models for chaos formation have been proposed, but the formation and evolution of this enigmatic terrain type has not yet been fully constrained. We provide extensive mapping of the individual bloc…
The Coma Dust of Comet C/2013 US10 (Catalina): A Window into Carbon in the Solar System
Woodward, Charles E.; Russell, Ray W.; Kelley, Michael S. P. +3 more
Comet C/2013 US10 (Catalina) was a dynamically new Oort cloud comet whose apparition presented a favorable geometry for observations near close-Earth approach (≃0.93 au) at heliocentric distances ≲2 au when insolation and sublimation of volatiles drive maximum activity. Here we present mid-infrared 6.0 ≲ λ(µm) ≲ 40 spectrophotomet…
Evidence for chromium hydride in the atmosphere of hot Jupiter WASP-31b
Chubb, Katy L.; Braam, Marrick; van der Tak, Floris F. S. +1 more
Context. The characterisation of exoplanet atmospheres has shown a wide diversity of compositions. Hot Jupiters have the appropriate temperatures to host metallic compounds, which should be detectable through transmission spectroscopy.
Aims: We aim to detect exotic species in the transmission spectra of hot Jupiters, specifically WASP-31b, by…
AU-scale radio imaging of the wind collision region in the brightest and most luminous non-thermal colliding wind binary Apep
Callingham, J. R.; Marcote, B.; De Becker, M. +5 more
The recently discovered colliding-wind binary (CWB) Apep has been shown to emit luminously from radio to X-rays, with the emission driven by a binary composed of two Wolf-Rayet (WR) stars of one carbon-sequence (WC8) and one nitrogen-sequence (WN4-6b). Mid-infrared imaging revealed a giant spiral dust plume that is reminiscent of a pinwheel nebula…
TRAO Survey of the Nearby Filamentary Molecular Clouds, the Universal Nursery of Stars (TRAO FUNS). II. Filaments and Dense Cores in IC 5146
Caselli, Paola; Kwon, Woojin; Soam, Archana +13 more
We present the results on the physical properties of filaments and dense cores in IC 5146, as a part of the TRAO FUNS project. We carried out on-the-fly mapping observations using the Taeduk Radio Astronomy Observatory (TRAO) 14 m telescope covering about 1 square degree of the area of IC 5146 using various molecular lines. We identified 14 filame…
PENELLOPE. II. CVSO 104: A pre-main sequence close binary with an optical companion in Ori OB1
Ábrahám, P.; Kóspál, Á.; Siwak, M. +14 more
We present the results of our study of the close pre-main sequence spectroscopic binary CVSO 104 in Ori OB1, based on data obtained within the PENELLOPE legacy program. We derive, for the first time, the orbital elements of the system and the stellar parameters of the two components. The system is composed of two early M-type stars and has an orbi…