Search Publications
Regularity Underlying Complexity: A Redshift-independent Description of the Continuous Variation of Galaxy-scale Molecular Gas Properties in the Mass-star Formation Rate Plane
Aussel, H.; Daddi, E.; Elbaz, D. +6 more
Star-forming galaxies (SFGs) display a continuous specific star formation rate (sSFR) distribution, which can be approximated by two log-normal functions: one encompassing the galaxy main sequence (MS), and the other a rarer, starbursting population. Starburst (SB) sSFRs can be regarded as the outcome of a physical process (plausibly merging) taki…
Disk evolution in the solar neighborhood. I. Disk frequencies from 1 to 100 Myr
Bouy, Hervé; Merín, Bruno; Ribas, Álvaro +1 more
Aims: We study the evolution of circumstellar disks in 22 young (1 to 100 Myr) nearby (within 500 pc) associations over the entire mass spectrum using photometry covering from the optical to the mid-infrared.
Methods: We compiled a catalog of 2340 spectroscopically-confirmed members of these nearby associations. We analyzed their spectra…
Gas structure inside dust cavities of transition disks: Ophiuchus IRS 48 observed by ALMA
van Dishoeck, Ewine F.; van der Marel, Nienke; Bruderer, Simon +1 more
Context. Transition disks are recognized by the absence of emission of small dust grains inside a radius of up to several 10s of AUs. Owing to the lack of angular resolution and sensitivity, the gas content of these dust holes has not yet been determined, but is of importance for constraining the mechanism leading to the dust holes. It is thought …
On the origin of near-infrared extragalactic background light anisotropy
Gong, Yan; Cooray, Asantha; Matsuura, Shuji +13 more
Extragalactic background light (EBL) anisotropy traces variations in the total production of photons over cosmic history and may contain faint, extended components missed in galaxy point-source surveys. Infrared EBL fluctuations have been attributed to primordial galaxies and black holes at the epoch of reionization (EOR) or, alternately, intrahal…
Disk Radii and Grain Sizes in Herschel-resolved Debris Disks
Moór, Attila; Pawellek, Nicole; Ábrahám, Péter +5 more
The radii of debris disks and the sizes of their dust grains are important tracers of the planetesimal formation mechanisms and physical processes operating in these systems. Here we use a representative sample of 34 debris disks resolved in various Herschel Space Observatory (Herschel is an ESA space observatory with science instruments provided …
Gas and dust in the beta Pictoris moving group as seen by the Herschel Space Observatory
Pinte, C.; Duchêne, G.; Dent, W. R. F. +11 more
Context. Debris discs are thought to be formed through the collisional grinding of planetesimals, and then can be considered as the outcome of planet formation. Understanding the properties of gas and dust in debris discs can help us comprehend the architecture of extrasolar planetary systems. Herschel Space Observatory far-infrared (IR) photometr…
Physical properties of fullerene-containing Galactic planetary nebulae
Otsuka, Masaaki; Peeters, E.; Bernard-Salas, J. +2 more
We searched the Spitzer Space Telescope data archive for Galactic planetary nebulae (PNe), which show the characteristic 17.4 and 18.9 µm features due to C60, also known as buckminsterfullerene. Out of 338 objects with Spitzer/Infrared Spectrograph data, we found eleven C60-containing PNe, six of which (Hen2-68, IC2501,…
Characterization of the gaseous companion κ Andromedae b. New Keck and LBTI high-contrast observations
Kuzuhara, M.; Tamura, M.; Ishii, M. +67 more
Context. We previously reported the direct detection of a low-mass companion at a projected separation of 55 ± 2 AU around the B9-type star κ Andromedae. The properties of the system (mass ratio, separation) make it a benchmark for understanding the formation and evolution of gas giant planets and brown dwarfs on wide orbits.
Aims: We present…
Neptune at summer solstice: Zonal mean temperatures from ground-based observations, 2003-2007
de Pater, Imke; Fletcher, Leigh N.; Irwin, Patrick G. J. +3 more
Imaging and spectroscopy of Neptune's thermal infrared emission from Keck/LWS (2003), Gemini-N/MICHELLE (2005); VLT/VISIR (2006) and Gemini-S/TReCS (2007) is used to assess seasonal changes in Neptune's zonal mean temperatures between Voyager-2 observations (1989, heliocentric longitude Ls = 236 °) and southern summer solstice (2005, L<…
Optical - near-infrared catalog for the AKARI north ecliptic pole Deep field
Goto, Tomotsugu; Ohyama, Youichi; Pearson, Chris +9 more
Aims: We present an 8-band (u∗, g', r', i', z', Y, J, Ks) optical to near-infrared deep photometric catalog based on the observations made with MegaCam and WIRCam at the CFHT, and compute photometric redshifts, zp in the north ecliptic pole (NEP) region. AKARI infrared satellite carried out a deep survey in th…