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Near-infrared Emission Spectrum of WASP-103b Using Hubble Space Telescope/Wide Field Camera 3
Knutson, Heather; Stassun, Keivan G.; Wright, Jason T. +8 more
We present here our observations and analysis of the dayside emission spectrum of the hot Jupiter WASP-103b. We observed WASP-103b during secondary eclipse using two visits of the Hubble Space Telescope with the G141 grism on Wide Field Camera 3 in spatial scan mode. We generated secondary eclipse light curves of the planet in both blended white-l…
37 GHz observations of narrow-line Seyfert 1 galaxies
Harrison, D. L.; Lähteenmäki, A.; López-Caniego, M. +12 more
Observations performed at Metsähovi Radio Observatory at 37 GHz are presented for a sample of 78 radio-loud and radio-quiet narrow-line Seyfert 1 (NLS1) galaxies, together with additional lower and higher frequency radio data from RATAN-600, Owens Valley Radio Observatory, and the Planck satellite. Most of the data have been gathered between Febru…
Simultaneous X-ray and radio observations of the radio-mode-switching pulsar PSR B1822-09
Kuiper, L.; Hermsen, W.; Hessels, J. W. T. +7 more
We report on simultaneous X-ray and radio observations of the radio-mode-switching pulsar PSR B1822-09 with ESA's XMM-Newton and the Westerbork Synthesis Radio Telescope, Giant Metrewave Radio Telescope and Lovell radio telescopes. PSR B1822-09 switches between a radio-bright and radio-quiet mode, and we discovered a relationship between the durat…
The AGN-Star Formation Connection: Future Prospects with JWST
Barro, Guillermo; Santini, Paola; Grogin, Norman A. +13 more
The bulk of the stellar growth over cosmic time is dominated by IR-luminous galaxies at cosmic noon (z=1{--}2), many of which harbor a hidden active galactic nucleus (AGN). We use state-of-the-art infrared color diagnostics, combining Spitzer and Herschel observations, to separate dust-obscured AGNs from dusty star-forming galaxies (SFGs) in the C…
SOHO comets: 20 years and 3000 objects later
Knight, Matthew M.; Battams, Karl
We present a summary of the more than 3000 sungrazing and near-Sun comets discovered in coronagraph images returned by the Solar and Heliospheric Observatory (SOHO), since its launch in December 1995. We address each of the four main populations of objects observed by SOHO: Kreutz (sungrazing) group, Meyer group, Marsden and Kracht (96P-family) gr…
Characterization of star-forming dwarf galaxies at 0.1 ≲z ≲ 0.9 in VUDS: probing the low-mass end of the mass-metallicity relation
Maccagni, D.; Schaerer, D.; Castellano, M. +19 more
Context. The study of statistically significant samples of star-forming dwarf galaxies (SFDGs) at different cosmic epochs is essential for the detailed understanding of galaxy assembly and chemical evolution. However, the main properties of this large population of galaxies at intermediate redshift are still poorly known.
Aims: We present the…
Modeling solar energetic particle events using ENLIL heliosphere simulations
Futaana, Y.; Luhmann, J. G.; Odstrcil, D. +9 more
Solar energetic particle (SEP) event modeling has gained renewed attention in part because of the availability of a decade of multipoint measurements from STEREO and L1 spacecraft at 1 AU. These observations are coupled with improving simulations of the geometry and strength of heliospheric shocks obtained by using coronagraph images to send erupt…
Cosmic microwave background constraints for global strings and global monopoles
Lizarraga, Joanes; Urrestilla, Jon; Hindmarsh, Mark +1 more
We present the first cosmic microwave background (CMB) power spectra from numerical simulations of the global O(N) linear σ-model, with N=2,3, which have global strings and monopoles as topological defects. In order to compute the CMB power spectra we compute the unequal time correlators (UETCs) of the energy-momentum tensor, showing that they fal…
Flares, wind and nebulae: the 2015 December mini-outburst of V404 Cygni
Ponti, G.; Dhillon, V. S.; Charles, P. A. +22 more
After more than 26 years in quiescence, the black hole transient V404 Cyg went into a luminous outburst in 2015 June, and additional activity was detected in late December of the same year. Here, we present an optical spectroscopic follow-up of the December mini-outburst, together with X-ray, optical and radio monitoring that spanned more than a m…
Characterizing the Transition from Diffuse Atomic to Dense Molecular Clouds in the Magellanic Clouds with [C II], [C I], and CO
Ott, Jürgen; Hughes, Annie; Wong, Tony +8 more
We present and analyze deep Herschel/HIFI observations of the [C II] 158 µm, [C I] 609 µm, and [C I] 370 µm lines toward 54 lines of sight in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC). These observations are used to determine the physical conditions of the line-emitting gas, which we use to study the trans…