Search Publications
Updated constraints on non-standard neutrino interactions from Planck
Archidiacono, Maria; Hannestad, Steen
We provide updated bounds on non-standard neutrino interactions based on data from the Planck satellite as well as auxiliary cosmological measurements. Two types of models are studied - A Fermi-like 4-point interaction and an interaction mediated by a light pseudoscalar - and we show that these two models are representative of models in which neut…
Dust and Gas in the Magellanic Clouds from the HERITAGE Herschel Key Project. I. Dust Properties and Insights into the Origin of the Submillimeter Excess Emission
Okumura, K.; Gordon, Karl D.; Bot, Caroline +33 more
The dust properties in the Large and Small Magellanic clouds (LMC/SMC) are studied using the HERITAGE Herschel Key Project photometric data in five bands from 100 to 500 µm. Three simple models of dust emission were fit to the observations: a single temperature blackbody modified by a power-law emissivity (SMBB), a single temperature blackbo…
An excess of dusty starbursts related to the Spiderweb galaxy
Altieri, B.; Sanchez-Portal, M.; Valtchanov, I. +16 more
We present APEX LABOCA 870 µm observations of the field around the high-redshift radio galaxy MRC1138-262 at z = 2.16. We detect 16 submillimeter galaxies (SMGs) in this ~140 arcmin2 bolometer map with flux densities in the range 3-11 mJy. The raw number counts indicate a density of SMGs that is up to four times that of blank fiel…
16 yr of RXTE Monitoring of Five Anomalous X-Ray Pulsars
Kaspi, Victoria M.; Dib, Rim
We present a summary of the long-term evolution of various properties of the five non-transient anomalous X-ray pulsars (AXPs) 1E 1841-045, RXS J170849.0-400910, 1E 2259+586, 4U 0142+61, and 1E 1048.1-5937, regularly monitored with RXTE from 1996 to 2012. We focus on three properties of these sources: the evolution of the timing, pulsed flux, and …
Reconstruction of total and spectral solar irradiance from 1974 to 2013 based on KPVT, SoHO/MDI, and SDO/HMI observations
Solanki, S. K.; Glassmeier, K. H.; Yeo, K. L. +1 more
Context. Total and spectral solar irradiance are key parameters in the assessment of solar influence on changes in the Earth's climate.
Aims: We present a reconstruction of daily solar irradiance obtained using the SATIRE-S model spanning 1974 to 2013 based on full-disc observations from the KPVT, SoHO/MDI, and SDO/HMI.
Methods: SATIRE-S…
Spectroscopy of z ∼ 7 candidate galaxies: using Lyman α to constrain the neutral fraction of hydrogen in the high-redshift universe
Wilkins, Stephen M.; Bunker, Andrew J.; Caruana, Joseph +4 more
Following our previous spectroscopic observations of z > 7 galaxies with Gemini/Gemini Near Infra-Red Spectrograph (GNIRS) and Very Large Telescope (VLT)/XSHOOTER, which targeted a total of eight objects, we present here our results from a deeper and larger VLT/FOcal Reducer and Spectrograph (FORS2) spectroscopic sample of Wide Field Camera 3 s…
The Role of Stellar Feedback in the Dynamics of H II Regions
Ramirez-Ruiz, Enrico; Prochaska, J. Xavier; Bolatto, Alberto D. +3 more
Stellar feedback is often cited as the biggest uncertainty in galaxy formation models today. This uncertainty stems from a dearth of observational constraints as well as the great dynamic range between the small scales (lsim1 pc) where the feedback originates and the large scales of galaxies (gsim1 kpc) that are shaped by this feedback. To bridge …
redMaPPer II: X-Ray and SZ Performance Benchmarks for the SDSS Catalog
Rykoff, E. S.; Rozo, E.
We evaluate the performance of the Sloan Digital Sky Survey (SDSS) DR8 redMaPPer photometric cluster catalog by comparing it to overlapping X-ray- and Sunyaev-Zeldovich (SZ)-selected catalogs from the literature. We confirm that the redMaPPer photometric redshifts are nearly unbiased (langΔzrang <= 0.005), have low scatter (σ z ≈ 0.…
Morphologies of z ∼ 0.7 AGN host galaxies in CANDELS: no trend of merger incidence with AGN luminosity
Juneau, S.; Santini, P.; Faber, S. M. +24 more
The processes that trigger active galactic nuclei (AGN) remain poorly understood. While lower luminosity AGN may be triggered by minor disturbances to the host galaxy, stronger disturbances are likely required to trigger luminous AGN. Major wet mergers of galaxies are ideal environments for AGN triggering since they provide large gas supplies and …
Are Dusty Galaxies Blue? Insights on UV Attenuation from Dust-selected Galaxies
Le Floc'h, E.; Ivison, R. J.; Sanders, D. B. +12 more
Galaxies' rest-frame ultraviolet (UV) properties are often used to directly infer the degree to which dust obscuration affects the measurement of star formation rates (SFRs). While much recent work has focused on calibrating dust attenuation in galaxies selected at rest-frame ultraviolet wavelengths, locally and at high-z, here we investigate atte…