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Widespread surface weathering on early Mars: A case for a warmer and wetter climate
Mangold, Nicolas; Bibring, Jean-Pierre; Poulet, François +2 more
Early Mars (>3 Ga) underwent aqueous alteration as evidenced by fluvial/lacustrine morphologies and the recent discovery of widespread hydrous clays. Despite compelling evidence for diverse and localized aqueous environments, the possibility for sustained liquid water globally on the martian surface and over geological timescales is still highl…
Noise-based Detection and Segmentation of Nebulous Objects
Ichikawa, Takashi; Akhlaghi, Mohammad
A noise-based non-parametric technique for detecting nebulous objects, for example, irregular or clumpy galaxies, and their structure in noise is introduced. “Noise-based” and “non-parametric” imply that this technique imposes negligible constraints on the properties of the targets and that it employs no regression analysis or fittings. The sub-sk…
Planck data reconsidered
Spergel, David N.; Hložek, Renée; Flauger, Raphael
The tension between the best fit parameters derived by the Planck team and a number of other astronomical measurements suggests either systematics in the astronomical measurements, systematics in the Planck data, the need for new physics, or a combination thereof. We reanalyze the Planck data and find that the 217 GHz ×217 GHz detector set spectru…
The FMOS-COSMOS Survey of Star-forming Galaxies at z~1.6. III. Survey Design, Performance, and Sample Characteristics
Daddi, E.; Rodighiero, G.; Ilbert, O. +28 more
We present a spectroscopic survey of galaxies in the COSMOS field using the Fiber Multi-object Spectrograph (FMOS), a near-infrared instrument on the Subaru Telescope. Our survey is specifically designed to detect the Hα emission line that falls within the H-band (1.6-1.8 µm) spectroscopic window from star-forming galaxies with 1.4 < z &l…
Space Telescope and Optical Reverberation Mapping Project.I. Ultraviolet Observations of the Seyfert 1 Galaxy NGC 5548 with the Cosmic Origins Spectrograph on Hubble Space Telescope
Brandt, W. N.; Kriss, G. A.; Ely, J. +47 more
We describe the first results from a six-month long reverberation-mapping experiment in the ultraviolet based on 171 observations of the Seyfert 1 galaxy NGC 5548 with the Cosmic Origins Spectrograph on the Hubble Space Telescope. Significant correlated variability is found in the continuum and broad emission lines, with amplitudes ranging from ∼3…
On the possible environmental effect in distributing heavy elements beyond individual gaseous haloes
Johnson, Sean D.; Chen, Hsiao-Wen; Mulchaey, John S.
We present a study of extended galaxy halo gas through H I and O VI absorption over two decades in projected distance at z ≈ 0.2. The study is based on a sample of 95 galaxies from a highly complete (>80 per cent) survey of faint galaxies (L > 0.1L*) with archival quasar absorption spectra and 53 galaxies from the literature. A cl…
Linking dust emission to fundamental properties in galaxies: the low-metallicity picture
Ciesla, L.; Cooray, A.; Lebouteiller, V. +15 more
Aims: In this work, we aim to provide a consistent analysis of the dust properties from metal-poor to metal-rich environments by linking them to fundamental galactic parameters.
Methods: We consider two samples of galaxies: the Dwarf Galaxy Survey (DGS) and the Key Insights on Nearby Galaxies: a Far-Infrared Survey with Herschel (KINGFIS…
Resolved spectroscopy of gravitationally lensed galaxies: global dynamics and star-forming clumps on ∼100 pc scales at 1 < z < 4
Smail, Ian; Swinbank, A. M.; Bower, R. G. +9 more
We present adaptive optics-assisted integral field spectroscopy around the Hα or Hβ lines of 12 gravitationally lensed galaxies obtained with VLT/SINFONI, Keck/OSIRIS and Gemini/NIFS. We combine these data with previous observations and investigate the dynamics and star formation properties of 17 lensed galaxies at 1 < z < 4. Thanks to gravi…
Tension between the power spectrum of density perturbations measured on large and small scales
Battye, Richard A.; Moss, Adam; Charnock, Tom
There is a tension between measurements of the amplitude of the power spectrum of density perturbations inferred using the cosmic microwave background (CMB) and directly measured by large-scale structure (LSS) on smaller scales. We show that this tension exists, and is robust, for a range of LSS indicators including clusters, lensing and redshift …
Mass Calibration and Cosmological Analysis of the SPT-SZ Galaxy Cluster Sample Using Velocity Dispersion σ v and X-Ray Y X Measurements
Gladders, M. D.; Rest, A.; Foley, R. J. +68 more
We present a velocity-dispersion-based mass calibration of the South Pole Telescope Sunyaev-Zel'dovich effect survey (SPT-SZ) galaxy cluster sample. Using a homogeneously selected sample of 100 cluster candidates from 720 deg2 of the survey along with 63 velocity dispersion (σ v ) and 16 X-ray Y X measurements of s…