Search Publications
The AIMSS Project - I. Bridging the star cluster-galaxy divide★†‡§¶
Penny, Samantha J.; Forbes, Duncan A.; Romanowsky, Aaron J. +16 more
We describe the structural and kinematic properties of the first compact stellar systems discovered by the Archive of Intermediate Mass Stellar Systems project. These spectroscopically confirmed objects have sizes (∼6 < Re [pc] < 500) and masses (∼2 × 106 < M*/M⊙ < 6 × 109) spannin…
Power Asymmetry in WMAP and Planck Temperature Sky Maps as Measured by a Local Variance Estimator
Banday, A. J.; Eriksen, H. K.; Górski, K. M. +4 more
We revisit the question of hemispherical power asymmetry in the WMAP and Planck temperature sky maps by measuring the local variance over the sky and on disks of various sizes. For the 2013 Planck sky map we find that none of the 1000 available isotropic Planck "Full Focal Plane" simulations have a larger variance asymmetry than that estimated fro…
HD 106906 b: A Planetary-mass Companion Outside a Massive Debris Disk
Mamajek, Eric; Weinberger, Alycia J.; Reiter, Megan +14 more
We report the discovery of a planetary-mass companion, HD 106906 b, with the new Magellan Adaptive Optics (MagAO) + Clio2 system. The companion is detected with Clio2 in three bands: J, KS , and L', and lies at a projected separation of 7.''1 (650 AU). It is confirmed to be comoving with its 13 ± 2 Myr F5 host using Hubble Space Telesco…
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological implications of the full shape of the clustering wedges in the data release 10 and 11 galaxy samples
Brownstein, Joel R.; Ho, Shirley; Schlegel, David J. +25 more
We explore the cosmological implications of the angle-averaged correlation function, ξ(s), and the clustering wedges, ξ⊥(s) and ξ∥(s), of the LOWZ and CMASS galaxy samples from Data Releases 10 and 11 of the Sloan Digital Sky Survey III (SDSS-III) Baryon Oscillation Spectroscopic Survey. Our results show no significant eviden…
Constraining dark matter-neutrino interactions using the CMB and large-scale structure
Lesgourgues, Julien; Bœhm, Céline; Wilkinson, Ryan J.
We present a new study on the elastic scattering cross section of dark matter (DM) and neutrinos using the latest cosmological data from Planck and large-scale structure experiments. We find that the strongest constraints are set by the Lyman-α forest, giving σDM-ν lesssim 10-33(mDM/GeV) cm2 if the cross…
Disk evolution in the solar neighborhood. I. Disk frequencies from 1 to 100 Myr
Bouy, Hervé; Merín, Bruno; Ribas, Álvaro +1 more
Aims: We study the evolution of circumstellar disks in 22 young (1 to 100 Myr) nearby (within 500 pc) associations over the entire mass spectrum using photometry covering from the optical to the mid-infrared.
Methods: We compiled a catalog of 2340 spectroscopically-confirmed members of these nearby associations. We analyzed their spectra…
Transmission Spectroscopy of the Hot Jupiter WASP-12b from 0.7 to 5 µm
Madhusudhan, Nikku; Stevenson, Kevin B.; Désert, Jean-Michel +5 more
Since the first report of a potentially non-solar carbon-to-oxygen ratio (C/O) in its dayside atmosphere, the highly irradiated exoplanet WASP-12b has been under intense scrutiny and the subject of many follow-up observations. Additionally, the recent discovery of stellar binary companions ~1'' from WASP-12 has obfuscated interpretation of the obs…
The Herschel-PACS photometer calibration. Point-source flux calibration for scan maps
Moór, Attila; Sauvage, Marc; Okumura, Koryo +9 more
This paper provides an overview of the PACS photometer flux calibration concept, in particular for the principal observation mode, the scan map. The absolute flux calibration is tied to the photospheric models of five fiducial stellar standards ( α Boo, α Cet, α Tau, β And, γ Dra). The data processing steps to arrive at a consistent and homogeneou…
Type-Ia Supernova Rates to Redshift 2.4 from CLASH: The Cluster Lensing And Supernova Survey with Hubble
Cenko, S. B.; Molino, A.; Leibundgut, B. +38 more
We present the supernova (SN) sample and Type-Ia SN (SN Ia) rates from the Cluster Lensing And Supernova survey with Hubble (CLASH). Using the Advanced Camera for Surveys and the Wide Field Camera 3 on the Hubble Space Telescope (HST), we have imaged 25 galaxy-cluster fields and parallel fields of non-cluster galaxies. We report a sample of 27 SNe…
Connecting Speeds, Directions and Arrival Times of 22 Coronal Mass Ejections from the Sun to 1 AU
Luhmann, J. G.; Möstl, C.; Farrugia, C. J. +15 more
Forecasting the in situ properties of coronal mass ejections (CMEs) from remote images is expected to strongly enhance predictions of space weather and is of general interest for studying the interaction of CMEs with planetary environments. We study the feasibility of using a single heliospheric imager (HI) instrument, imaging the solar wind densi…