Search Publications
Three Wide Planetary-mass Companions to FW Tau, ROXs 12, and ROXs 42B
Hinkley, Sasha; Dupuy, Trent J.; Ireland, Michael J. +4 more
We report the discovery of three planetary-mass companions (M = 6-20 M Jup) in wide orbits (ρ ~ 150-300 AU) around the young stars FW Tau (Taurus-Auriga), ROXs 12 (Ophiuchus), and ROXs 42B (Ophiuchus). All three wide planetary-mass companions (PMCs) were reported as candidate companions in previous binary survey programs, but then were …
Variable gravity: A suitable framework for quintessential inflation
Saridakis, Emmanuel N.; Myrzakulov, R.; Hossain, Md. Wali +1 more
In this paper, we investigate a scenario of variable gravity and apply it to the unified description of inflation and late-time cosmic acceleration dubbed quintessential inflation. The scalar field called "cosmon," which in this model unifies both the concepts, reduces to the inflaton at early epochs. We calculate the slow-roll parameters, the Hub…
Planck 2013 results. VI. High Frequency Instrument data processing
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +240 more
Wedescribe the processing of the 531 billion raw data samples from the High Frequency Instrument (HFI), which we performed to produce six temperature maps from the first 473 days of Planck-HFI survey data. These maps provide an accurate rendition of the sky emission at 100, 143, 217, 353, 545, and 857GHz with an angular resolution ranging from 9.´…
Herschel Observations of Extraordinary Sources: Analysis of the HIFI 1.2 THz Wide Spectral Survey toward Orion KL. I. Methods
Cernicharo, José; McGuire, Brett A.; Bergin, Edwin A. +19 more
We present a comprehensive analysis of a broadband spectral line survey of the Orion Kleinmann-Low nebula (Orion KL), one of the most chemically rich regions in the Galaxy, using the HIFI instrument on board the Herschel Space Observatory. This survey spans a frequency range from 480 to 1907 GHz at a resolution of 1.1 MHz. These observations thus …
The Lyα Reference Sample. I. Survey Outline and First Results for Markarian 259
Verhamme, Anne; Cannon, John M.; Hayes, Matthew +20 more
The Lyα Reference Sample (LARS) is a substantial program with the Hubble Space Telescope (HST) that provides a sample of local universe laboratory galaxies in which to study the detailed astrophysics of the visibility and strength of the Lyαline of neutral hydrogen. Lyα is the dominant spectral line in use for characterizing high-redshift (z) gala…
The Type IIb Supernova 2013df and its Cool Supergiant Progenitor
Van Dyk, Schuyler D.; Filippenko, Alexei V.; Foley, Ryan J. +10 more
We have obtained early-time photometry and spectroscopy of supernova (SN) 2013df in NGC 4414. The SN is clearly of Type IIb, with notable similarities to SN 1993J. From its luminosity at secondary maximum light, it appears that less 56Ni (lsim 0.06 M ⊙) was synthesized in the SN 2013df explosion than was the case for the SNe …
GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts
Wuyts, E.; Cenko, S. B.; Covino, S. +62 more
Context. At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with luminosities that are substantially lower (Liso ≲ 1048.5 erg s-1) than the average of more distant ones (Liso ≳ 1049.5 erg s-1). It has been suggested that the properties of several low-luminosi…
High-resolution Observations of the Shock Wave Behavior for Sunspot Oscillations with the Interface Region Imaging Spectrograph
Weber, M.; Golub, L.; Tian, H. +20 more
We present the first results of sunspot oscillations from observations by the Interface Region Imaging Spectrograph. The strongly nonlinear oscillation is identified in both the slit-jaw images and the spectra of several emission lines formed in the transition region and chromosphere. We first apply a single Gaussian fit to the profiles of the Mg …
The VLT-FLAMES Tarantula Survey. XVI. The optical and NIR extinction laws in 30 Doradus and the photometric determination of the effective temperatures of OB stars
van Loon, J. Th.; Crowther, P. A.; Herrero, A. +11 more
Context. The commonly used extinction laws of Cardelli et al. (1989, ApJ, 345, 245) have limitations that, among other issues, hamper the determination of the effective temperatures of O and early B stars from optical and near-infrared (NIR) photometry.
Aims: We aim to develop a new family of extinction laws for 30 Doradus, check their genera…
Detection of thermal SZ-CMB lensing cross-correlation in Planck nominal mission data
Spergel, David N.; Hill, J. Colin
The nominal mission maps from the Planck satellite contain a wealth of information about secondary anisotropies in the cosmic microwave background (CMB), including those induced by the thermal Sunyaev-Zel'dovich (tSZ) effect and gravitational lensing. As both the tSZ and CMB lensing signals trace the large-scale matter density field, the anisotrop…