Search Publications
CLASH: Photometric redshifts with 16 HST bands in galaxy cluster fields
Infante, L.; Zheng, W.; Molino, A. +35 more
Context. The Cluster Lensing And Supernovae survey with Hubble (CLASH) is a Hubble Space Telescope (HST) Multi-Cycle Treasury programme thatobserves 25 massive galaxy clusters, 20 of which were X-ray-selected to preferably choose dynamically relaxed clusters, and 5 additional "high magnification" clusters, which were selected based on their optica…
Very Late Photometry of SN 2011fe
Ruiter, A. J.; Seitenzahl, I. R.; Kerzendorf, W. E. +1 more
The Type Ia supernova SN 2011fe is one of the closest supernovae of the past decades. Due to its proximity and low dust extinction, this object provides a very rare opportunity to study the extremely late time evolution (>900 days) of thermonuclear supernovae. In this Letter, we present our photometric data of SN 2011fe taken at an unprecedente…
Variability of the High-velocity Outflow in the Quasar PDS 456
Behar, E.; Turner, T. J.; Reeves, J. N. +9 more
We present a comparison of two Suzaku X-ray observations of the nearby (z = 0.184), luminous (L bol ~ 1047 erg s-1) type I quasar, PDS 456. A new 125 ks Suzaku observation in 2011 caught the quasar during a period of low X-ray flux and with a hard X-ray spectrum, in contrast with a previous 190 ks Suzaku observatio…
Properties of Polycyclic Aromatic Hydrocarbons in the Northwest Photon Dominated Region of NGC 7023. II. Traditional PAH Analysis Using k-means as a Visualization Tool
Boersma, C.; Allamandola, L. J.; Bregman, J.
Polycyclic aromatic hydrocarbon (PAH) emission in the Spitzer-IRS spectral map of the northwest photon dominated region (PDR) in NGC 7023 is analyzed using the "traditional" approach in which the PAH bands and plateaus between 5.2-19.5 µm are isolated by subtracting the underlying continuum and removing H2 emission lines. The spec…
How to link the relative abundances of gas species in coma of comets to their initial chemical composition?
Marboeuf, Ulysse; Schmitt, Bernard
Comets are expected to be the most primitive objects in the Solar System. The chemical composition of these objects is frequently assumed to be directly provided by the observations of the abundances of volatile molecules in the coma. The present work aims to determine the relationship between the chemical composition of the coma, the outgassing p…
Origin and z-distribution of Galactic diffuse [C II] emission
Langer, W. D.; Velusamy, T.
Context. The [C ii] emission is an important probe of star formation in the Galaxy and in external galaxies. The GOT C+ survey and its follow up observations of spectrally resolved 1.9 THz [C ii] emission using Herschel HIFI provides the data needed to quantify the Galactic interstellar [C ii] gas components as tracers of star formation.
Aims…
ALMA Observations of Warm Molecular Gas and Cold Dust in NGC 34
Sanders, D. B.; Murphy, E. J.; Armus, L. +17 more
We present Atacama Large Millimeter Array (ALMA) Cycle-0 observations of the CO (6-5) line emission (rest-frame frequency = 691.473 GHz) and of the 435 µm dust continuum emission in the nuclear region of NGC 34, a local luminous infrared galaxy at a distance of 84 Mpc (1'' = 407 pc) which contains a Seyfert 2 active galactic nucleus (AGN) an…
To Stack or Not to Stack: Spectral Energy Distribution Properties of Lyα-emitting Galaxies at z = 2.1
Finkelstein, Steven L.; Ferguson, Henry; Gronwall, Caryl +13 more
We use the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (CANDELS) GOODS-S multi-wavelength catalog to identify counterparts for 20 Lyα emitting (LAE) galaxies at z = 2.1. We build several types of stacked spectral energy distributions (SEDs) of these objects. We combine photometry to form average and median flux-stacked SEDs, and…
Does the Debris Disk around HD 32297 Contain Cometary Grains?
Currie, Thayne; Debes, John H.; Schneider, Glenn +13 more
We present an adaptive optics imaging detection of the HD 32297 debris disk at L' (3.8 µm) obtained with the LBTI/LMIRcam infrared instrument at the Large Binocular Telescope. The disk is detected at signal-to-noise ratio per resolution element ~3-7.5 from ~0.''3 to 1.''1 (30-120 AU). The disk at L' is bowed, as was seen at shorter wavelengt…
Statistical study of chorus wave distributions in the inner magnetosphere using Ae and solar wind parameters
Aryan, Homayon; Yearby, Keith; Balikhin, Michael +3 more
Energetic electrons within the Earth's radiation belts represent a serious hazard to geostationary satellites. The interactions of electrons with chorus waves play an important role in both the acceleration and loss of radiation belt electrons. The common approach is to present model wave distributions in the inner magnetosphere under different va…