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Unveiling the Physics of Low-luminosity AGNs through X-Ray Variability: LINER versus Seyfert 2
González-Martín, O.; Perea, J.; Márquez, I. +2 more
X-ray variability is very common in active galactic nuclei (AGNs), but these variations may not occur similarly in different families of AGNs. We aim to disentangle the structure of low-ionization nuclear emission-line regions (LINERs) compared to Seyfert 2s by the study of their spectral properties and X-ray variations. We assembled the X-ray spe…
Linking low- to high-mass young stellar objects with Herschel-HIFI observations of water
Braine, J.; van Dishoeck, E. F.; Johnstone, D. +7 more
Context. Water probes the dynamics in young stellar objects (YSOs) effectively, especially shocks in molecular outflows. It is therefore a key molecule for exploring whether the physical properties of low-mass protostars can be extrapolated to massive YSOs, an important step in understanding the fundamental mechanisms regulating star formation.
The PEP survey: evidence for intense star-forming activity in the majority of radio-selected AGN at z ≳ 1
Berta, S.; Lutz, D.; Popesso, P. +4 more
In order to investigate the far-infrared (FIR) properties of radio-active active galactic nuclei (AGN), we have considered three different fields where both radio and FIR observations are the deepest to date: GOODS-South, GOODS-North and the Lockman Hole. Out of a total of 92 radio-selected AGN, ∼64 per cent are found to have a counterpart in Hers…
PALOMA: A Magnetic CV between Polars and Intermediate Polars
Pandey, J. C.; Singh, K. P.; Joshi, Arti +1 more
We present analyses of archival X-ray data obtained from the XMM-Newton satellite and optical photometric data obtained from 1 m class telescopes of ARIES, Nainital of a magnetic cataclysmic variable (MCV) Paloma. Two persistent periods at 156 ± 1 minutes and 130 ± 1 minutes are present in the X-ray data, which we interpret as the orbital and spin…
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…