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 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 …
AKARI IRC 2.5-5 µm Spectroscopy of Infrared Galaxies over a Wide Luminosity Range
Nakagawa, Takao; Shirahata, Mai; Oyabu, Shinki +4 more
We present the result of a systematic infrared 2.5-5 µm spectroscopic study of 22 nearby infrared galaxies over a wide infrared luminosity range (1010 L ⊙ < L IR < 1013 L ⊙) obtained from the AKARI Infrared Camera (IRC). The unique band of the AKARI IRC spectroscopy enables us to a…
A Tale of Two Feedbacks: Star Formation in the Host Galaxies of Radio AGNs
Kim, Seong Jin; Ohyama, Youichi; Pearson, Chris +19 more
Several lines of argument support the existence of a link between activity at the nuclei of galaxies, in the form of an accreting supermassive black hole, and star formation activity in these galaxies. Radio jets have long been argued to be an ideal mechanism that allows active galactic nuclei (AGNs) to interact with their host galaxies and affect…
A Data-driven Approach for Retrieving Temperatures and Abundances in Brown Dwarf Atmospheres
Fortney, Jonathan J.; Line, Michael R.; Marley, Mark S. +1 more
Brown dwarf spectra contain a wealth of information about their molecular abundances, temperature structure, and gravity. We present a new data driven retrieval approach, previously used in planetary atmosphere studies, to extract the molecular abundances and temperature structure from brown dwarf spectra. The approach makes few a priori physical …
Ultraluminous Infrared Galaxies in the AKARI All-sky Survey
Goto, T.; Doi, Y.; Kilerci Eser, E.
We present a new catalog of 118 ultraluminous infrared galaxies (ULIRGs) and one hyperluminous infrared galaxy (HLIRG) by cross-matching the AKARI all-sky survey with the Sloan Digital Sky Survey Data Release 10 (SDSS DR10) and the final data release of the Two-Degree Field Galaxy Redshift Survey. Forty of the ULIRGs and one HLIRG are new identifi…
CHARA/MIRC Observations of Two M Supergiants in Perseus OB1: Temperature, Bayesian Modeling, and Compressed Sensing Imaging
Kiss, L. L.; Baron, F.; McAlister, H. A. +12 more
Two red supergiants (RSGs) of the Per OB1 association, RS Per and T Per, have been observed in the H band using the Michigan Infra-Red Combiner (MIRC) instrument at the CHARA array. The data show clear evidence of a departure from circular symmetry. We present here new techniques specially developed to analyze such cases, based on state-of-the-art…
Resolved Multifrequency Radio Observations of GG Tau
Wilner, D. J.; Testi, L.; Henning, Th. +20 more
We present subarcsecond resolution observations of continuum emission associated with the GG Tau quadruple star system at wavelengths of 1.3, 2.8, 7.3, and 50 mm. These data confirm that the GG Tau A binary is encircled by a circumbinary ring at a radius of 235 AU with a FWHM width of ~60 AU. We find no clear evidence for a radial gradient in the …
Physical Properties of Asteroids in Comet-like Orbits in Infrared Asteroid Survey Catalogs
Usui, Fumihiko; Kim, Yoonyoung; Ishiguro, Masateru
We investigated the population of asteroids in comet-like orbits using available asteroid size and albedo catalogs of data taken with the Infrared Astronomical Satellite, AKARI, and the Wide-field Infrared Survey Explorer on the basis of their orbital properties (i.e., the Tisserand parameter with respect to Jupiter, T J, and the apheli…
The NUV-r versus Mr Plane as a Tracer of Early-type Galaxy Evolution in the USGC U376 and LGG 225 Groups
Mazzei, Paola; Rampazzo, Roberto; Marino, Antonietta
With the aim of tracing back the evolution of galaxies in nearby groups, we use smooth particle hydrodynamical (SPH) simulations with chemo-photometric implementation. Here, we focus on the evolution of the early-type members (Es and S0s; ETGs hereafter) in two groups, USGC U376 and LGG 225, both in the Leo cloud. We use the near-UV (NUV)-optical …