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Systematic Uncertainties Associated with the Cosmological Analysis of the First Pan-STARRS1 Type Ia Supernova Sample
Price, P. A.; Berger, E.; Challis, P. +46 more
We probe the systematic uncertainties from the 113 Type Ia supernovae (SN Ia) in the Pan-STARRS1 (PS1) sample along with 197 SN Ia from a combination of low-redshift surveys. The companion paper by Rest et al. describes the photometric measurements and cosmological inferences from the PS1 sample. The largest systematic uncertainty stems from the p…
Star Formation at 4 < z < 6 from the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH)
Strauss, Michael A.; Capak, Peter; Scoville, Nick +21 more
Using the first 50% of data collected for the Spitzer Large Area Survey with Hyper-Suprime-Cam observations on the 1.8 deg2 Cosmological Evolution Survey we estimate the masses and star formation rates of 3398 M * > 1010 M ⊙ star-forming galaxies at 4 < z < 6 with a substantial population up to …
The SAMI Galaxy Survey: shocks and outflows in a normal star-forming galaxy
Kewley, Lisa J.; Bland-Hawthorn, Joss; Konstantopoulos, Iraklis S. +15 more
We demonstrate the feasibility and potential of using large integral field spectroscopic surveys to investigate the prevalence of galactic-scale outflows in the local Universe. Using integral field data from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) and the Wide Field Spectrograph, we study the nature of an isolated disc galax…
Short GRB 130603B: Discovery of a Jet Break in the Optical and Radio Afterglows, and a Mysterious Late-time X-Ray Excess
Berger, E.; Foley, R. J.; Chornock, R. +13 more
We present radio, optical/NIR, and X-ray observations of the afterglow of the short-duration Swift and Konus-Wind GRB 130603B, and uncover a break in the radio and optical bands at ≈0.5 day after the burst, best explained as a jet break with an inferred jet opening angle of ≈4°-8°. GRB 130603B is only the third short GRB with a radio afterglow det…
Charting the Evolution of the Ages and Metallicities of Massive Galaxies since z = 0.7
Bell, Eric F.; Brinchmann, Jarle; Kelson, Daniel D. +2 more
Detailed studies of the stellar populations of intermediate-redshift galaxies can shed light onto the processes responsible for the growth of the massive galaxy population in the last 8 billion years. We here take a step toward this goal by means of deep, multiobject rest-frame optical spectroscopy, performed with the Inamori Magellan Areal Camera…
Spectroscopic Confirmation of the Rich z = 1.80 Galaxy Cluster JKCS 041 using the WFC3 Grism: Environmental Trends in the Ages and Structure of Quiescent Galaxies
Treu, Tommaso; Trinchieri, Ginevra; Ellis, Richard S. +3 more
We present Hubble Space Telescope imaging and grism spectroscopy in the field of the distant galaxy cluster JKCS 041 using the Wide Field Camera 3. We confirm that JKCS 041 is a rich cluster and derive a redshift z = 1.80 via the spectroscopic identification of 19 member galaxies, of which 15 are quiescent. These are centered upon diffuse X-ray em…
The Atacama Cosmology Telescope: CMB polarization at 200 < ℓ < 9000
Hilton, Matt; Hasselfield, Matthew; Bond, J. Richard +75 more
We report on measurements of the cosmic microwave background (CMB) and celestial polarization at 146 GHz made with the Atacama Cosmology Telescope Polarimeter (ACTPol) in its first three months of observing. Four regions of sky covering a total of 270 square degrees were mapped with an angular resolution of 1.3'. The map noise levels in the four r…
Properties of z ~ 3-6 Lyman break galaxies. II. Impact of nebular emission at high redshift
Schaerer, D.; Stark, D. P.; de Barros, S.
Context. To gain insight on the mass assembly and place constraints on the star formation history (SFH) of Lyman break galaxies (LBGs), it is important to accurately determine their properties.
Aims: We estimate how nebular emission and different SFHs affect parameter estimation of LBGs.
Methods: We present a homogeneous, detailed analys…
The importance of being warm (during inflation)
Rosa, João G.; Ramos, Rudnei O.; Bartrum, Sam +3 more
The amplitude of primordial curvature perturbations is enhanced when a radiation bath at a temperature T>H is sustained during inflation by dissipative particle production, which is particularly significant when a non-trivial statistical ensemble of inflaton fluctuations is also maintained. Since gravitational modes are oblivious to dissipative…
Dust spectral energy distributions of nearby galaxies: an insight from the Herschel Reference Survey
Ciesla, L.; Buat, V.; Boquien, M. +20 more
Although it accounts only for a small fraction of the baryonic mass, dust has a profound impact on the physical processes at play in galaxies. Thus, to understand the evolution of galaxies, it is essential not only to characterize dust properties per se, but also in relation to global galaxy properties. To do so, we derive the dust properties of g…