Search Publications
Missions
Journals
Publication Years
Effective ion speeds at ∼200-250 km from comet 67P/Churyumov-Gerasimenko near perihelion
Nilsson, H.; André, M.; Goetz, C. +13 more
In 2015 August, comet 67P/Churyumov-Gerasimenko, the target comet of the ESA Rosetta mission, reached its perihelion at ∼1.24 au. Here, we estimate for a three-day period near perihelion, effective ion speeds at distances ∼200-250 km from the nucleus. We utilize two different methods combining measurements from the Rosetta Plasma Consortium (RPC)/…
Relic gravitational waves from quintessential inflation
Myrzakulov, R.; Sami, M.; Ahmad, Safia
We study relic gravitational waves in the paradigm of quintessential inflation. In this framework, irrespective of the underlying model, inflation is followed by the kinetic regime. Thereafter, the field energy density remains subdominant before the onset of acceleration. We carry out model-independent analysis to obtain the temperature at the end…
The Young Substellar Companion ROXs 12 B: Near-infrared Spectrum, System Architecture, and Spin-Orbit Misalignment
Vanderburg, Andrew; Brogi, Matteo; Knutson, Heather A. +8 more
ROXs 12 (2MASS J16262803-2526477) is a young star hosting a directly imaged companion near the deuterium-burning limit. We present a suite of spectroscopic, imaging, and time-series observations to characterize the physical and environmental properties of this system. Moderate-resolution near-infrared spectroscopy of ROXs 12 B from Gemini-North/NI…
A WISE-based search for debris discs amongst M dwarfs in nearby, young, moving groups
Jeffries, R. D.; Binks, A. S.
We present a search for debris discs amongst M-dwarf members of nearby, young (5-150 Myr) moving groups (MGs) using infrared (IR) photometry, primarily from the Wide Infrared Survey Explorer (WISE). A catalogue of 100 MG M dwarfs that have suitable WISE data is compiled, and 19 of these are found to have significant IR excess emission at 22 µ…
AGN spectral states from simultaneous UV and X-ray observations by XMM-Newton
Merloni, A.; Guainazzi, M.; Svoboda, J.
Context. It is generally believed that the supermassive black holes in active galactic nuclei (AGN) and stellar-mass black holes in X-ray binaries (XRBs) work in a similar way.
Aims: While XRBs evolve rapidly and several sources have undergone a few complete cycles from quiescence to an outburst and back, most AGN remain in the same state ove…
The First Scattered-light Image of the Debris Disk around the Sco-Cen Target HD 129590
Hinkley, Sasha; Matthews, Elisabeth; Stapelfeldt, Karl +7 more
We present the first scattered-light image of the debris disk around HD 129590, a ∼1.3 M ⊙ G1V member of the Scorpius-Centaurus association with an age of ∼10-16 Myr. The debris disk is imaged with the high contrast imaging instrument SPHERE at the Very Large Telescope, and is revealed by both the IRDIS and IFS subsytems, operating in t…
Distance biases in the estimation of the physical properties of Hi-GAL compact sources - I. Clump properties and the identification of high-mass star-forming candidates
Benedettini, M.; Elia, D.; Pezzuto, S. +8 more
The degradation of spatial resolution in star-forming regions, observed at large distances (d ≳ 1 kpc) with Herschel, can lead to estimates of the physical parameters of the detected compact sources (clumps), which do not necessarily mirror the properties of the original population of cores. This paper aims at quantifying the bias introduced in th…
The Highly Ionized Circumgalactic Medium is Kinematically Uniform around Galaxies
Charlton, Jane C.; Kacprzak, Glenn G.; Churchill, Christopher W. +3 more
The circumgalactic medium (CGM) traced by O VI λ λ 1031,1037 doublet absorption has been found to concentrate along the projected major and minor axes of the host galaxies. This suggests that O VI traces accreting and outflowing gas, respectively, which are key components of the baryon cycle of galaxies. We investigate this further by examining th…
Galaxy Merger Candidates in High-redshift Cluster Environments
Cooper, M. C.; Demarco, R.; Lidman, C. +14 more
We compile a sample of spectroscopically and photometrically selected cluster galaxies from four high-redshift galaxy clusters (1.59< z< 1.71) from the Spitzer Adaptation of the Red-Sequence Cluster Survey (SpARCS), and a comparison field sample selected from the UKIDSS Deep Survey. Using near-infrared imaging from the Hubble Space Telescope…
ZFIRE: The Evolution of the Stellar Mass Tully-Fisher Relation to Redshift ∼2.2
Kewley, Lisa J.; Kacprzak, Glenn G.; Glazebrook, Karl +8 more
Using observations made with MOSFIRE on Keck I as part of the ZFIRE survey, we present the stellar mass Tully-Fisher relation at 2.0< z< 2.5. The sample was drawn from a stellar-mass-limited, {K}s-band-selected catalog from ZFOURGE over the CANDELS area in the COSMOS field. We model the shear of the Hα emission line to derive rota…