Search Publications
HST hot-Jupiter transmission spectral survey: haze in the atmosphere of WASP-6b
Aigrain, S.; Pont, F.; Fortney, J. J. +14 more
We report Hubble Space Telescope optical to near-infrared transmission spectroscopy of the hot-Jupiter WASP-6b, measured with the Space Telescope Imaging Spectrograph and Spitzer's InfraRed Array Camera. The resulting spectrum covers the range 0.29-4.5 µm. We find evidence for modest stellar activity of WASP-6 and take it into account in the…
Composite bulges: the coexistence of classical bulges and discy pseudo-bulges in S0 and spiral galaxies
Beckman, John E.; Bender, Ralf; Thomas, Jens +6 more
We present an analysis of nine S0-Sb galaxies which have (photometric) bulges consisting of two distinct components. The outer component is a flattened, kinematically cool, disc-like structure: a `discy pseudo-bulge'. Embedded inside is a rounder, kinematically hot spheroidal structure: a `classical bulge'. This indicates that pseudo-bulges and cl…
A Deep Hubble Space Telescope and Keck Search for Definitive Identification of Lyman Continuum Emitters at z~3.1
Dickinson, Mark; Ferguson, Henry C.; Giavalisco, Mauro +13 more
Narrowband imaging of the rest-frame Lyman continuum (LyC) of galaxies at z∼ 3.1 has produced a large number of candidate LyC-emitting galaxies. These samples are contaminated by galaxies at lower redshift. To better understand LyC escape, we need an uncontaminated sample of galaxies that emit strongly in the LyC. Here we present deep Hubble Space…
Coevolution of brightest cluster galaxies and intracluster light using CLASH
Hilton, Matt; Burke, Claire; Collins, Chris
We examine the stellar mass assembly in galaxy cluster cores using data from the Cluster Lensing And Supernova survey with Hubble (CLASH). We measure the growth of brightest cluster galaxy (BCG) stellar mass, the fraction of the total cluster light which is in the intracluster light (ICL) and the numbers of mergers that occur in the BCG over the r…
Coordinated X-Ray, Ultraviolet, Optical, and Radio Observations of the PSR J1023+0038 System in a Low-mass X-Ray Binary State
Deller, Adam T.; Lyne, Andrew G.; Bogdanov, Slavko +14 more
The PSR J1023+0038 binary system hosts a neutron star and a low-mass, main-sequence-like star. It switches on year timescales between states as an eclipsing radio millisecond pulsar and a low-mass X-ray binary (LMXB). We present a multi-wavelength observational campaign of PSR J1023+0038 in its most recent LMXB state. Two long XMM-Newton observati…
The timing and location of dust formation in the remnant of SN 1987A
Barlow, M. J.; Wesson, R.; Matsuura, M. +1 more
The discovery with the Herschel Space Observatory of bright far-infrared and submm emission from the ejecta of the core-collapse supernova SN 1987A has been interpreted as indicating the presence of some 0.4-0.7 M⊙ of dust. We have constructed radiative transfer models of the ejecta to fit optical to far-infrared observations from the l…
Understanding star formation in molecular clouds. I. Effects of line-of-sight contamination on the column density structure
André, Ph.; Schneider, N.; Ossenkopf, V. +6 more
Column-density maps of molecular clouds are one of the most important observables in the context of molecular cloud- and star-formation (SF) studies. With the Herschel satellite it is now possible to precisely determine the column density from dust emission, which is the best tracer of the bulk of material in molecular clouds. However, line-of-sig…
Galaxy Mergers Drive Shocks: An Integral Field Study of GOALS Galaxies
Kewley, L. J.; Dopita, M. A.; Rich, J. A.
We present an integral field spectroscopic study of radiative shocks in 27 nearby ultraluminous and luminous infrared galaxies (U/LIRGs) from the Great Observatory All-sky LIRG Survey, a subset of the Revised Bright Galaxy Sample. Our analysis of the resolved spectroscopic data from the Wide Field Spectrograph focuses on determining the detailed p…
Star formation in the local Universe from the CALIFA sample. I. Calibrating the SFR using integral field spectroscopy data
Bomans, D. J.; Galbany, L.; Kennicutt, R. C. +24 more
Context. The star formation rate (SFR) is one of the main parameters used to analyze the evolution of galaxies through time. The need for recovering the light reprocessed by dust commonly requires the use of low spatial resolution far-infrared data. Recombination line luminosities provide an alternative, although uncertain dust-extinction correcti…
Temporal Evolution of Chromospheric Evaporation: Case Studies of the M1.1 Flare on 2014 September 6 and X1.6 Flare on 2014 September 10
Reeves, Katharine K.; Chen, Bin; Liu, Wei +3 more
With observations from the Interface Region Imaging Spectrograph, we track the complete evolution of ∼11 MK evaporation flows in an M1.1 flare on 2014 September 6 and an X1.6 flare on 2014 September 10. These hot flows, as indicated by the blueshifted Fe xxi 1354.08 Å line, evolve smoothly with a velocity decreasing exponentially from ∼200 km s