Search Publications
The Carnegie Hubble Program: The Leavitt Law at 3.6 and 4.5 µm in the Milky Way
Madore, Barry F.; Freedman, Wendy L.; Rigby, Jane R. +4 more
The Carnegie Hubble Program (CHP) is designed to calibrate the extragalactic distance scale using data from the post-cryogenic era of the Spitzer Space Telescope. The ultimate goal of the CHP is a systematic improvement in the distance scale leading to a determination of the Hubble constant to within an accuracy of 2%. This paper focuses on the me…
Field O stars: formed in situ or as runaways?
Gvaramadze, V. V.; Pflamm-Altenburg, J.; Kroupa, P. +1 more
A significant fraction of massive stars in the Milky Way and other galaxies are located far from star clusters and star-forming regions. It is known that some of these stars are runaways, i.e. possess high space velocities (determined through the proper motion and/or radial velocity measurements), and therefore most likely were formed in embedded …
Lower Hybrid Drift Waves: Space Observations
Khotyaintsev, Yuri V.; Vaivads, Andris; André, Mats +1 more
Lower hybrid drift waves (LHDWs) are commonly observed at plasma boundaries in space and laboratory, often having the strongest measured electric fields within these regions. We use data from two of the Cluster satellites (C3 and C4) located in Earth’s magnetotail and separated by a distance of the order of the electron gyroscale. These conditions…
Discovery of bright z ≃ 7 galaxies in the UltraVISTA survey
Taniguchi, Y.; Bowler, R. A. A.; McLure, R. J. +10 more
We have exploited the new, deep, near-infrared UltraVISTA imaging of the Cosmological Evolution Survey (COSMOS) field, in tandem with deep optical and mid-infrared imaging, to conduct a new search for luminous galaxies at redshifts z ≃ 7. The year-one UltraVISTA data provide contiguous Y, J, H, Ks imaging over 1.5 deg2, reach…
Relation Between Coronal Hole Areas on the Sun and the Solar Wind Parameters at 1 AU
Temmer, M.; Veronig, A. M.; Vršnak, B. +1 more
We analyze the relationship between the coronal hole (CH) characteristics on the Sun (area, position, and intensity levels) and the corresponding solar wind parameters (solar wind speed v, proton temperature T, proton density n, and magnetic field strength B) measured in situ at 1 AU with a 6-h time resolution. We developed a histogram-based inten…
Multi-line detection of O2 toward ρ Ophuichi A
Olofsson, G.; Falgarone, E.; Liseau, R. +36 more
Context. Models of pure gas-phase chemistry in well-shielded regions of molecular clouds predict relatively high levels of molecular oxygen, O2, and water, H2O. These high abundances imply high cooling rates, leading to relatively short timescales for the evolution of gravitationally unstable dense cores, forming stars and pl…
Herschel-ATLAS/GAMA: a census of dust in optically selected galaxies from stacking at submillimetre wavelengths
Rodighiero, G.; Ivison, R. J.; Clements, D. L. +42 more
We use the Herschel-ATLAS survey to conduct the first large-scale statistical study of the submillimetre properties of optically selected galaxies. Using ∼80 000 r-band selected galaxies from 126 deg2 of the GAMA survey, we stack into submillimetre imaging at 250, 350 and 500 µ m to gain unprecedented statistics on the dust emissi…
The Hubble Wide Field Camera 3 Test of Surfaces in the Outer Solar System: The Compositional Classes of the Kuiper Belt
Fraser, Wesley C.; Brown, Michael E.
We present the first results of the Hubble Wide Field Camera 3 Test of Surfaces in the Outer Solar System. The purpose of this survey was to measure the surface properties of a large number of Kuiper Belt objects and attempt to infer compositional and dynamical correlations. We find that the Centaurs and the low-perihelion scattered disk and reson…
Numerical Simulations of the Magnetic Rayleigh-Taylor Instability in the Kippenhahn-Schlüter Prominence Model. I. Formation of Upflows
Shibata, Kazunari; Isobe, Hiroaki; Hillier, Andrew +1 more
The launch of the Hinode satellite led to the discovery of rising plumes, dark in chromospheric lines, that propagate from large (~10 Mm) bubbles that form at the base of quiescent prominences. The plumes move through a height of approximately 10 Mm while developing highly turbulent profiles. The magnetic Rayleigh-Taylor instability was hypothesiz…
The SWELLS survey - IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy
Treu, Tommaso; Marshall, Philip J.; Auger, Matthew W. +6 more
We construct a fully self-consistent mass model for the lens galaxy SDSS J2141 at redshift 0.14, and use it to improve on previous studies by modelling its gravitational lensing effect, gas rotation curve and stellar kinematics simultaneously. We adopt a very flexible axisymmetric mass model constituted by a generalized Navarro-Frenk-White (NFW) d…