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200 papers

We report observations of the high (R$\sim$18000) and medium (R$\sim$5900) resolution, near-infrared spectra of Jupiter's polar regions with the GNIRS instrument at the Gemini North telescope. The observations correspond to the area of main…

Earth and Planetary Astrophysics · Physics 2017-05-24 L. Kedziora-Chudczer , D. V. Cotton , D. J. Kedziora , J. Bailey

We use JWST/MIRI MRS spectroscopy of a sample of six local obscured type 1.9/2 active galactic nuclei (AGN) to compare their nuclear mid-IR absorption bands with the level of nuclear obscuration traced by X-rays. This study is the first to…

A new experimental set-up INterStellar Ice-Dust Experiment (INSIDE), was designed for studying cosmic grain analogues represented by ice-coated carbon- and silicate-based dust grains. In the new instrument, we can simulate physical and…

Instrumentation and Methods for Astrophysics · Physics 2019-07-24 Alexey Potapov , Cornelia Jäger , Thomas Henning

Near-infrared medium-resolution spectra of seven bright brown dwarfs are presented. The spectra were obtained with the Infrared Camera (IRC) on board the infrared astronomical satellite AKARI, covering 2.5--5.0 um with a spectral resolution…

Solar and Stellar Astrophysics · Physics 2015-05-19 Issei Yamamura , Takashi Tsuji , Toshihiko Tanabe

We present ALMA observations of the largest protoplanetary disk in the Orion Nebula, 114-426. Detectable 345 GHz (856 micron) dust continuum is produced only in the 350 AU central region of the ~1000 AU diameter silhouette seen against the…

The evolution of interstellar ices can be studied with thermal tracers such as the vibrational modes of CO$_2$ ice that show great diversity depending on their local chemical and thermal environment. In this work we present JWST…

Interstellar Objects (ISO) passing through our Solar System offer a rare opportunity to probe the physical and chemical processes involved in solid body and planet formation in extrasolar systems. The main objective of our study is to…

Earth and Planetary Astrophysics · Physics 2020-02-05 Bin Yang , Michael S. P. Kelley , Karen J. Meech , Jacqueline V. Keane , Silvia Protopapa , Schelte J. Bus

OMC-2 FIR 4 is one of the closest known young intermediate-mass protoclusters, located at a distance of 420 pc in Orion. This region is one of the few where the complete 500-2000 GHz spectrum has been observed with the heterodyne…

We present a low-resolution (R = 90), 5.5-38 micron spectral sequence of a sample of M, L, and T dwarfs obtained with the Infrared Spectrograph (IRS) onboard the Spitzer Space Telescope. The spectra exhibit prominent absorption bands of…

We present a new near-infrared photometric system for detection of water ice and methane ice in the solar system. The system consists of two medium-band filters in the K-band region of the near-infrared, which are sensitive to water ice and…

Earth and Planetary Astrophysics · Physics 2015-05-27 Chadwick A. Trujillo , Scott S. Sheppard , Emily L. Schaller

Europa has been modified by a variety of geologic processes, exposing internally-derived materials that are heavily irradiated by charged particles trapped in Jupiter's magnetosphere. Prior spectral analysis of H2O ice on Europa relied on…

We present the size, shape and flux densities at millimeter continuum wavelengths, based on ALMA science verification observations in Band 3 (~94.6 GHz) and Band 6 (~228.7 GHz), from the binary Mira A (o Ceti) and Mira B. The Mira AB system…

Solar and Stellar Astrophysics · Physics 2015-05-13 W. H. T. Vlemmings , S. Ramstedt , E. O'Gorman , E. M. L. Humphreys , M. Wittkowski , A. Baudry , M. Karovska

We present long baseline Atacama Large Millimeter/submillimeter Array (ALMA) observations of the 870$\,\mu$m dust continuum emission and CO (3-2) from the protoplanetary disk around the Herbig Ae/Be star HD 100546, which is one of the few…

Solar and Stellar Astrophysics · Physics 2019-01-30 J. E. Pineda , J. Szulágyi , S. P. Quanz , E. F. van Dishoeck , A. Garufi , F. Meru , G. D. Mulders , L. Testi , M. R. Meyer , M. Reggiani

We present a computational study into the adsorption properties of CO$_2$ on amorphous and crystalline water surfaces under astrophysically relevant conditions. Water and carbon dioxide are two of the most dominant species in the icy…

Astrophysics of Galaxies · Physics 2017-09-13 L. J. Karssemeijer , G. A. de Wijs , H. M. Cuppen

We present mid-infrared (MIR) observations, made with the TIMMI2 camera on the ESO 3.6 m telescope, toward 14 young massive star-forming regions. All regions were imaged in the N band, and nine in the Q band, with an angular resolution of ~…

Astrophysics of Galaxies · Physics 2011-02-11 Esteban F. E. Morales , Diego Mardones , Guido Garay , Kate J. Brooks , Jaime E. Pineda

We present a radiative transfer analysis of latitudinally resolved H (1.487-1.783 micron) and K (2.028-2.364 micron) band spectra of Uranus, from which we infer the distributions of aerosols and methane in the planet's atmosphere. Data were…

Earth and Planetary Astrophysics · Physics 2018-06-06 Michael T. Roman , Don Banfield , Peter J. Gierasch

[Context] The first detection of an atmosphere around an extrasolar planet was presented by Charbonneau and collaborators in 2002. In the optical transmission spectrum of the transiting exoplanet HD209458b, an absorption signal from sodium…

Astrophysics · Physics 2009-11-13 I. A. G. Snellen , S. Albrecht , E. J. W. de Mooij , R. S. Le Poole

The solar analogs of M67 let us glimpse the probable behavior of the Sun on time scales surpassing the duration of human civilization. M67 can serve as a solar proxy because its stars share a similar age and composition with the Sun.…

Solar and Stellar Astrophysics · Physics 2017-06-21 Jason Lee Curtis

We present the first results of AKARI Infrared Camera near-infrared spec- troscopic survey of the Large Magellanic Cloud (LMC). We detected absorption features of the H2O ice 3.05 um and the CO2 ice 4.27 um stretching mode toward seven…