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ALMA-backed NIR high resolution integral field spectroscopy of the NUGA galaxy NGC 1433
Eckart, Andreas; García-Marín, Macarena; Combes, Françoise +7 more
Aims: We present the results of near-infrared (NIR) H- and K-band European Southern Observatory SINFONI integral field spectroscopy (IFS) of the Seyfert 2 galaxy
Three infrared spectrometers, an atmospheric chemistry suite for the ExoMars 2016 trace gas orbiter
Montmessin, Franck; Korablev, Oleg; Moshkin, Boris +8 more
The atmospheric chemistry suite (ACS) package is a part of the Russian contribution to the ExoMars ESA-Roscosmos mission. ACS consists of three separate infrared spectrometers, sharing common mechanical, electrical, and thermal interfaces. The near-infrared (NIR) channel is a versatile spectrometer for the spectral range of 0.7-1.6 µm with a…
Characterization of the Benchmark Binary NLTT 33370
Henning, Thomas; Skemer, Andrew; Leisenring, Jarron +16 more
We confirm the binary nature of the nearby, very low mass (VLM) system NLTT 33370 with adaptive optics imaging and present resolved near-infrared photometry and integrated light optical and near-infrared spectroscopy to characterize the system. VLT-NaCo and LBTI-LMIRCam images show significant orbital motion between 2013 February and 2013 April. O…
Formaldehyde Chemistry in Cometary Ices: On the Prospective Detection of NH2CH2OH, HOCH2OH, and POM by the On-board ROSINA Instrument of the Rosetta Mission
Duvernay, F.; Danger, G.; Theulé, P. +2 more
The thermal reactivity of a water-dominated cometary ice analog containing H2CO and NH3 is investigated by means of Fourier transform infrared spectroscopy, mass spectrometry, and B3LYP calculations. Three products are characterized by these techniques: aminomethanol (NH2CH2OH), methyleneglycol (HOCH
Time transfer functions as a way to validate light propagation solutions for space astrometry
Bertone, Stefano; Crosta, Mariateresa; Vecchiato, Alberto +3 more
Given the extreme accuracy of modern space astrometry, a precise relativistic modeling of observations is required. Concerning light propagation, the standard procedure is the solution of the null-geodesic equations. However, another approach based on the time transfer functions (TTF) has demonstrated its capability to give access to key quantitie…
Derivation of an Analytical Approximation of the Spectrum of Spinning Dust Emission
Stevenson, Matthew A.
An analytical function for the spectrum of spinning dust emission is presented. It is derived through the application of careful approximations, with each step tested against numerical calculations. This approach ensures accuracy while providing an intuitive picture of the physics. The final result may be useful for fitting of anomalous microwave …
Spectrum characteristics of electromagnetic ion cyclotron triggered emissions and associated energetic proton dynamics
Omura, Yoshiharu; Shoji, Masafumi
We perform parametric analyses of electromagnetic ion cyclotron (EMIC) triggered emissions with a gradient of the nonuniform ambient magnetic field using a hybrid simulation. According to nonlinear wave growth theory, as the gradient of the ambient magnetic field becomes larger, the theoretical threshold of the wave amplitude becomes larger, altho…
On the Collective Magnetic Field Strength and Vector Structure of Dark Umbral Cores Measured by the Hinode Spectropolarimeter
Schad, T. A.
We study 7530 sunspot umbrae and pores measured by the Hinode Spectropolarimeter (SP) between November 2006 and November 2012. We primarily seek confirmation of the long term secular decrease in the mean magnetic field strength of sunspot umbrae found by Penn and Livingston (IAU Symp.273, 126, 2011) between 1998 and 2011. The excellent SP photomet…
Toward a Better Understanding of the Distance Scale from RR Lyrae Variable Stars: A Case Study for the Inner Halo Globular Cluster NGC 6723
López-Morales, Mercedes; Lee, Jae-Woo; Kang, Young-Woon +3 more
We present BV photometry for 54 variables in the metal-rich inner halo globular cluster NGC 6723. With the discovery of new RR Lyrae variables (RRLs), we obtain langP abrang = 0.541 ± 0.066 and langP crang = 0.292 ± 0.030 day, n(c)/n(ab+c) = 0.167, and langV(RR)rangint = 15.459 ± 0.055. We carry out the Fourier dec…
Dwarf galaxies in the Perseus Cluster: further evidence for a disc origin for dwarf ellipticals
Penny, Samantha J.; Forbes, Duncan A.; Pimbblet, Kevin A. +1 more
We present the results of a Keck-ESI (Echellette Spectrograph and Imager) spectroscopic study of six dwarf elliptical (dE) galaxies in the Perseus Cluster core, and confirm two dwarfs as cluster members for the first time. All six dEs follow the size-magnitude relation for dE/dSph galaxies. Central velocity dispersions are measured for three Perse…