Search Publications
The challenging task of determining star formation rates: the case of a massive stellar burst in the brightest cluster galaxy of Phoenix galaxy cluster
McDonald, M.; Bruzual, Gustavo; Mittal, Rupal +1 more
Star formation in galaxies at the centre of cooling-flow galaxy clusters is an important phenomenon in the context of formation and evolution of massive galaxies in the Universe. Yet, star formation rates (SFRs) in such systems continue to be elusive. We use our Bayesian-motivated spectral energy distribution (SED)-fitting code, BAYESCOOL, to esti…
Coherently modulated whistler mode waves simultaneously observed over unexpectedly large spatial scales
Ma, Qianli; Li, Jinxing; Kletzing, Craig A. +10 more
Utilizing simultaneous twin Van Allen Probes observations of whistler mode waves at variable separations, we are able to distinguish the temporal variations from spatial variations, determine the coherence spatial scale, and suggest the possible mechanism of wave modulation. The two probes observed coherently modulated whistler mode waves simultan…
Rearrangements of Open Magnetic Flux and Formation of Polar Coronal Holes in Cycle 24
Golubeva, E. M.; Mordvinov, A. V.
A method of synoptic map assimilation has been developed to study global rearrangements of open magnetic flux and formation of polar coronal holes (PCHs) in the current cycle. The analysis reveals ensembles of coronal holes (ECHs) that appear within unipolar magnetic regions associated with decaying activity complexes (ACs). The cause-effect relat…
NuSTAR Hard X-Ray Observation of the Gamma-Ray Binary Candidate HESS J1832-093
Hailey, Charles J.; Mori, Kaya; Gotthelf, E. V. +13 more
We present a hard X-ray observation of the TeV gamma-ray binary candidate HESS J1832-093, which is coincident with the supernova remnant G22.7-0.2, using the Nuclear Spectroscopic Telescope Array. Non-thermal X-ray emission from XMMU J183245-0921539, the X-ray source associated with HESS J1832-093, is detected up to ∼30 keV and is well-described b…
Galaxy kinematics in the XMMU J2235-2557 cluster field at z 1.4
Böhm, A.; Tanaka, M.; Ziegler, B. +2 more
Aims: The relationship between baryonic and dark components in galaxies varies with the environment and cosmic time. Galaxy scaling relations describe strong trends between important physical properties. A very important quantitative tool in case of spiral galaxies is the Tully-Fisher relation (TFR), which combines the luminosity of the stell…
Trapping mechanism of O2 in water ice as first measured by Rosetta spacecraft
Bar-Nun, Akiva; Laufer, Diana; Ninio Greenberg, Adi
One of the most surprising measurements of the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) instrument on the comet 67P/Churyumov-Gerasimenko was the detection of O2 along with N2 and noble gases which were measured for the first time in comets, along with the major constituents, water, CO, and CO2<…
H-ATLAS/GAMA: magnification bias tomography. Astrophysical constraints above ~1 arcmin
Ivison, R. J.; Bonavera, L.; Danese, L. +14 more
An unambiguous manifestation of the magnification bias is the cross-correlation between two source samples with non-overlapping redshift distributions. In this work we measure and study the cross-correlation signal between a foreground sample of GAMA galaxies with spectroscopic redshifts in the range 0.2<z<0.8, and a background sample of H-A…
A deeper view of the CoRoT-9 planetary system. A small non-zero eccentricity for CoRoT-9b likely generated by planet-planet scattering
Aigrain, S.; Alonso, R.; Bordé, P. +27 more
Turbulent Density Fluctuations and Proton Heating Rate in the Solar Wind from 9-20 R ⊙
Vourlidas, Angelos; Ramesh, R.; Subramanian, Prasad +2 more
We obtain scatter-broadened images of the Crab Nebula at 80 MHz as it transits through the inner solar wind in 2017 and 2016 June. These images are anisotropic, with the major axis oriented perpendicular to the radially outward coronal magnetic field. Using these data, we deduce that the density modulation index (δ {N}e/{N}e)…
A Radio Relic and a Search for the Central Black Hole in the Abell 2261 Brightest Cluster Galaxy
Lauer, Tod R.; Postman, Marc; Lazio, T. Joseph W. +4 more
We present VLA images and HST/STIS spectra of sources within the center of the brightest cluster galaxy (BCG) in Abell 2261. These observations were obtained to test the hypothesis that its extremely large, flat core reflects the ejection of its supermassive black hole. Spectra of three of the four most luminous “knots” embedded in the core were t…