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Modeling of the Zodiacal Emission for the AKARI/IRC Mid-infrared All-sky Diffuse Maps
Onaka, Takashi; Ootsubo, Takafumi; Kaneda, Hidehiro +6 more
The zodiacal emission, which is the thermal infrared (IR) emission from the interplanetary dust (IPD) in our solar system, has been studied for a long time. Nevertheless, accurate modeling of the zodiacal emission has not been successful to reproduce the all-sky spatial distribution of the zodiacal emission, especially in the mid-IR where the zodi…
The SLICE, CHESS, and SISTINE Ultraviolet Spectrographs: Rocket-Borne Instrumentation Supporting Future Astrophysics Missions
France, Kevin; Hoadley, Keri; Nell, Nicholas +4 more
NASA’s suborbital program provides an opportunity to conduct unique science experiments above Earth’s atmosphere and is a pipeline for the technology and personnel essential to future space astrophysics, heliophysics, and atmospheric science missions. In this paper, we describe three astronomy payloads developed (or in development) by the Ultravio…
Prospects for high-z cluster detections with Planck, based on a follow-up of 28 candidates using MegaCam at CFHT
Dahle, H.; Aussel, H.; Aghanim, N. +13 more
The Planck catalogue of SZ sources limits itself to a significance threshold of 4.5 to ensure a low contamination rate by false cluster candidates. This means that only the most massive clusters at redshift z> 0.5, and in particular z> 0.7, are expected to enter into the catalogue, with a large number of systems in that redshift regime being…
Simultaneous Near-Sun Observations of a Moving Type IV Radio Burst and the Associated White-Light Coronal Mass Ejection
Ramesh, R.; Kathiravan, C.; Wang, T. J. +1 more
We present rare contemporaneous low-frequency (<100 MHz) imaging, spectral, and polarimetric observations of a moving type IV radio burst that had close spatio-temporal association with a white-light coronal mass ejection (CME) near the Sun. We estimate the electron density near the burst region from white-light coronagraph polarized brightness…
Cassini's geological and compositional view of Tethys
Rodriguez, Sebastien; Baines, Kevin H.; Buratti, Bonnie J. +14 more
The Saturnian satellite Tethys exhibits geological and spectral properties, whose appearance, nature and spatial distribution partly mirror those identified on the neighboring satellites Dione and Rhea or fit to the picture how spectral surface properties are expected to change from one satellite to the other within the inner Saturnian system. How…
Radio variability in the Phoenix Deep Survey at 1.4 GHz
Gaensler, B. M.; Hancock, P. J.; Bell, M. E. +2 more
We use archival data from the Phoenix Deep Survey to investigate the variable radio source population above 1 mJy beam-1 at 1.4 GHz. Given the similarity of this survey to other such surveys we take the opportunity to investigate the conflicting results which have appeared in the literature. Two previous surveys for variability conducte…
A Solar Flare Disturbing a Light Wall above a Sunspot Light Bridge
Hou, Yijun; Li, Ting; Yang, Shuhong +3 more
With the high-resolution data from the Interface Region Imaging Spectrograph, we detect a light wall above a sunspot light bridge in the NOAA active region (AR) 12403. In the 1330 Å slit-jaw images, the light wall is brighter than the ambient areas while the wall top and base are much brighter than the wall body, and it keeps oscillating above the…
Suzaku X-ray Observations of the Nearest Non-Cool Core Cluster, Antlia: Dynamically Young but with Remarkably Relaxed Outskirts
Sarazin, Craig L.; Reiprich, Thomas H.; Wik, Daniel R. +4 more
We present the results of seven Suzaku mosaic observations (>200 ks in total) of the nearest non-cool core cluster, the Antlia Cluster (or Group), beyond its degree-scale virial radius in its eastern direction. The temperature is consistent with the scaled profiles of many other clusters. Its pressure follows the universal profile. The density …
Testing the theory of colliding winds: the periastron passage of 9 Sagittarii. I. X-ray and optical spectroscopy
Gosset, E.; Blomme, R.; Nazé, Y. +7 more
Context. The long-period, highly eccentric O-star binary 9 Sgr, known for its non-thermal radio emission and its relatively bright X-ray emission, went through its periastron in 2013.
Aims: Such an event can be used to observationally test the predictions of the theory of colliding stellar winds over a broad range of wavelengths.
Methods…
The Supernova Impostor PSN J09132750+7627410 and Its Progenitor
Zaggia, S.; Ochner, P.; Cappellaro, E. +11 more
We report the results of our follow-up campaign of the supernova impostor PSN J09132750+7627410, based on optical data covering ∼250 days. From the beginning, the transient shows prominent narrow Balmer lines with P-Cygni profiles, with a blueshifted absorption component becoming more prominent with time. Along the ∼3 months of the spectroscopic m…