Search Publications
Millimeter and submillimeter excess emission in M 33 revealed by Planck and LABOCA
Boquien, M.; Kramer, C.; Relaño, M. +6 more
Context. Previous studies have shown the existence of an excess of emission at submillimeter (submm) and millimeter (mm) wavelengths in the spectral energy distribution (SED) of many low-metallicity galaxies. The so-called "submm excess", whose origin remains unknown, challenges our understanding of the dust properties in low-metallicity environme…
H II Region Ionization of the Interstellar Medium: A Case Study of NGC 7538
Anderson, L. D.; Bania, T. M.; Balser, Dana S. +2 more
Using data from the Green Bank Telescope, we analyze the radio continuum (free-free) and radio recombination line (RRL) emission of the compact H II region NGC 7538 (Sharpless 158). We detect extended radio continuum and hydrogen RRL emission beyond the photodissociation region (PDR) toward the north and east, but a sharp decrease in emission towa…
Cross-correlation between X-Ray and Optical/Near-infrared Background Intensity Fluctuations
Luo, Bin; Xue, Yongquan; Koekemoer, Anton +3 more
Angular power spectra of optical and infrared background anisotropies at wavelengths between 0.5 and 5 µm are a useful probe of faint sources present during reionization, in addition to faint galaxies and diffuse signals at low redshift. The cross-correlation of these fluctuations with backgrounds at other wavelengths can be used to separate…
Relativistic Fe Kα line study in Seyfert 1 galaxies observed with Suzaku
Nandra, K.; Ponti, G.; Mantovani, G.
We present an analysis of a sample of Seyfert 1 galaxies observed with Suzaku. The aim of this work is to examine critically the evidence for a relativistic Fe Kα line in the X-ray spectra of these active galactic nuclei. The sample was compiled from those sources in which a relativistic component was missing in at least one XMM-Newton observation…
The SOPHIE search for northern extrasolar planets. XI. Three new companions and an orbit update: Giant planets in the habitable zone
Bouchy, F.; Deleuil, M.; Moutou, C. +25 more
We report the discovery of three new substellar companions to solar-type stars, HD 191806, HD 214823, and HD 221585, based on radial velocity measurements obtained at the Haute-Provence Observatory. Data from the SOPHIE spectrograph are combined with observations acquired with its predecessor, ELODIE, to detect and characterise the orbital paramet…
An alternative validation strategy for the Planck cluster catalogue and y-distortion maps
Khatri, Rishi
We present an all-sky map of the y-type distortion calculated from the full mission Planck High Frequency Instrument (HFI) data using the recently proposed approach to component separation, which is based on parametric model fitting and model selection. This simple model-selection approach enables us to distinguish between carbon monoxide (CO) lin…
Discovery of Molecular Hydrogen in SN 1987A
Fransson, Claes; Leibundgut, Bruno; Spyromilio, Jason +3 more
Both CO and SiO have been observed at early and late phases in SN 1987A. H2 was predicted to form at roughly the same time as these molecules, but was not detected at early epochs. Here, we report the detection of NIR lines from H2 at 2.12 and 2.40 µ {{m}} in VLT/SINFONI spectra obtained between days 6489 and 10,120. Th…
The variable spin-down rate of the transient magnetar XTE J1810-197
Pintore, Fabio; Mereghetti, Sandro; Esposito, Paolo +7 more
We have analysed XMM-Newton and Chandra observations of the transient magnetar XTE J1810-197 spanning more than 11 yr, from the initial phases of the 2003 outburst to the current quiescent level. We investigated the evolution of the pulsar spin period and we found evidence for two distinct regimes: during the outburst decay, dot{ν } was highly var…
The CDF Archive: Herschel PACS and SPIRE Spectroscopic Data Pipeline and Products for Protostars and Young Stellar Objects
Larson, Rebecca L.; Lee, Jeong-Eun; Bouwman, Jeroen +6 more
We present the COPS-DIGIT-FOOSH (CDF) Herschel spectroscopy data product archive, and related ancillary data products, along with data fidelity assessments, and a user-created archive in collaboration with the Herschel-PACS and SPIRE ICC groups. Our products include datacubes, contour maps, automated line fitting results, and best 1D spectra produ…
Solo dwarfs I: survey introduction and first results for the Sagittarius dwarf irregular galaxy
Côté, P.; Battaglia, G.; Lewis, G. F. +6 more
We introduce the Solitary Local dwarfs survey (Solo), a wide-field photometric study targeting every isolated dwarf galaxy within 3 Mpc of the Milky Way. Solo is based on (u)gi multiband imaging from Canada-France-Hawaii Telescope/MegaCam for northern targets, and Magellan/Megacam for southern targets. All galaxies fainter than MV ≃ -18…