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Io’s Atmosphere Silhouetted by Jupiter Lyα
Feaga, L. M.; Roth, L.; Retherford, K. D. +4 more
We report results from a new technique for mapping Io’s SO2 vapor distribution. The Space Telescope Imaging Spectrograph (STIS) instrument on the Hubble Space Telescope observed Io during four Jupiter transit events to obtain medium resolution far-UV spectral images near the Lyα wavelength of 121.6 nm. Jupiter’s bright Lyα dayglow provi…
AKARI mid-infrared slit-less spectroscopic catalogue
Baba, Shunsuke; Onaka, Takashi; Yamamura, Issei +4 more
AKARI/IRC is capable of conducting slit-less spectroscopy in the mid-infrared (5-13 µm) over a 10' × 10' area with a spectral resolution of 50, which is suitable for serendipitous surveys. The data reduction is, however, rather complicated by the confusion of nearby sources after dispersing the spectra. To achieve efficient and reliable data…
Investigating the Pulsar Wind Nebula 3C 58 Using Emission Models
An, Hongjun; Park, Jaegeun; Kim, Seungjong
We present IR flux density measurements, models of the broadband SED, and results of SED modeling for the Pulsar Wind Nebula (PWN) 3C 58. We find that the Herschel flux density seems to be slightly lower than suggested by interpolation of previous measurements in nearby wavebands, implying that there may be multiple electron populations in 3C 58. …
Calibration of parent and fragment ion detection rates in Rosettas ROSINA/DFMS mass spectrometer
Altwegg, K.; Balsiger, H.; Fuselier, S. A. +7 more
Revisiting the magnetization of comet 67P/Churyumov-Gerasimenko
Richter, I.; Glassmeier, K. H.; Heinisch, P. +1 more
Context. The landing of the Philae probe as part of the ESA Rosetta mission made it possible to study the magnetization of comet 67P/Churyumov-Gerasimenko (67P) by combining observations from the lander and orbiter. In this work, we revisit the magnetic properties with information gained during the progression of the mission for a comprehensive un…
Evolution of the disc atmosphere in the X-ray binary MXB 1659-298, during its 2015-17 outburst
Degenaar, N.; Bianchi, S.; Ponti, G. +3 more
We report on the evolution of the X-ray emission of the accreting neutron star (NS) low-mass X-ray binary (LMXB), MXB 1659-298, during its most recent outburst in 2015-17. We detected 60 absorption lines during the soft state (of which 21 at more than 3σ), that disappeared in the hard state (e.g. the Fe XXV and Fe XXVI lines). The absorbing plasma…
On surface brightness and flux calibration for point and compact extended sources in the AKARI Far-IR All-Sky Survey (AFASS) maps
Takita, Satoshi; Ueta, Toshiya; Szczerba, Ryszard +1 more
The AKARI infrared astronomical satellite produced all-sky survey (AFASS) maps in the far-infrared at roughly arcminute spatial resolution, enabling us to investigate the whole sky in the far-infrared for objects having surface brightnesses greater than a few to a couple of dozen MJy sr-1. While the AFASS maps are absolutely calibrated …
An analysis of binary microlensing event OGLE-2015-BLG-0060
Bennett, D. P.; Soszyński, I.; Udalski, A. +79 more
We present the analysis of stellar binary microlensing event OGLE-2015-BLG-0060 based on observations obtained from 13 different telescopes. Intensive coverage of the anomalous parts of the light curve was achieved by automated follow-up observations from the robotic telescopes of the Las Cumbres Observatory. We show that, for the first time, all …
Photometry study in period variation and orbital parameter of two W UMa eclipsing binaries: AV Crb and EK Aqr
Han, Xianming L.; Lu, Hong-peng; Zhang, Li-yun +2 more
We report new light curves of two eclipsing binaries of AV Crb and EK Aqr obtained in 2017 and 2018 using Holcomb and SARA telescopes. We obtain the updated ephemeris and find a continuous period decrease (AV Crb) and increase (EK Aqr), respectively. We used the 2015 version Wilson-Devinney method to analyze the light curves and asymmetries. The e…
LAMOST J011939.222-012150.45: The most barium-enhanced CEMP-s turnoff star
Zhao, Gang; Li, Haining; Matsuno, Tadafumi +2 more
We have performed chemical abundance analyses for a newly discovered metal-poor turn-off star (Teff = 6276 K, log g = 3.93, [Fe/H] = -2.93), LAMOST J011939.222-012150.45, based on high-resolution and high signal-to-noise ratio spectra in both optical and near-UV obtained by Subaru. Abundances have been derived for 20 elements, including…