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On the Host Galaxy of GRB 150101B and the Associated Active Galactic Nucleus
Liu, Tong; Wang, Junfeng; Fang, Taotao +2 more
We present a multi-wavelength analysis of the host galaxy of short-duration gamma-ray burst (GRB) 150101B. Follow-up optical and X-ray observations suggested that the host galaxy, 2MASX J12320498-1056010, likely harbors low-luminosity active galactic nuclei (AGNs). Our modeling of the spectral energy distribution has confirmed the nature of the AG…
X-rays associated with the jet-cloud-interacting radio galaxy 3C 277.3 (Coma A): implications for energy deposition
Young, A. J.; Birkinshaw, M.; Worrall, D. M.
We report the discovery with Chandra of X-ray-emitting gas associated with the jet-cloud interaction in the radio galaxy 3C 277.3 (Coma A), a source that falls in the most important power range for radio-mode feedback in the Universe. This hot gas, heated by the jet, dominates the mass of the cloud which is responsible for an extreme projected def…
Investigating the cores of fossil systems with Chandra
Bharadwaj, V.; Sanders, J. S.; Reiprich, T. H. +1 more
Aims: We aim to systematically investigate the cores of a sample of fossil galaxy groups and clusters ("fossil systems"), using Chandra data, to see what hints they can offer about the properties of the intracluster medium in these particular objects.
Methods: We chose a sample of 17 fossil systems from literature with archival Chandra d…
The color ratio-intensity relation in the Jovian aurora: Hubble observations of auroral components
Bonfond, B.; Gérard, J. -C.; Grodent, D. +1 more
Spectral observations made with the long slit of the Space Telescope Imaging Spectrograph (STIS) on board Hubble have been used to construct spectral maps of the FUV Jovian aurora. They reveal that the amount of absorption by overlying methane shows significant spatial variations. In this report, we examine the relationship between the auroral bri…
The Physical Environment around IRAS 17599-2148: Infrared Dark Cloud and Bipolar Nebula
Dewangan, L. K.; Ojha, D. K.; Zinchenko, I. +3 more
We present a multiscale and multiwavelength study to investigate the star formation process around IRAS 17599-2148, which is part of an elongated filamentary structure (EFS) (extension ∼21 pc) seen in the Herschel maps. Using the Herschel data analysis, at least six massive clumps (M clump ∼ 777-7024 M ⊙) are found in the EFS…
Masses of the components of SB2 binaries observed with Gaia - III. Accurate SB2 orbits for 10 binaries and masses of HIP 87895
Mazeh, T.; Tal-Or, L.; Halbwachs, J. -L. +9 more
In anticipation of the Gaia astrometric mission, a large sample of spectroscopic binaries has been observed since 2010 with the Spectrographe pour l'Observation des PHénomènes des Intérieurs Stellaires et des Exoplanètes spectrograph at the Haute-Provence Observatory. Our aim is to derive the orbital elements of double-lined spectroscopic binaries…
On the State of a Solar Active Region Before Flares and CMEs
Erdélyi, R.; Korsós, M. B.
Several attempts have been made to find reliable diagnostic tools to determine the state prior to flares and related coronal mass ejections (CMEs) in solar active regions (ARs). Characterization of the level of mixed states is carried out using the Debrecen sunspot Data for 116 flaring ARs. Conditional flare probabilities (CFPs) are calculated for…
Cassini observations of ionospheric plasma in Saturn's magnetotail lobes
Coates, A. J.; Dougherty, M. K.; Reisenfeld, D. B. +8 more
Studies of Saturn's magnetosphere with the Cassini mission have established the importance of Enceladus as the dominant mass source for Saturn's magnetosphere. It is well known that the ionosphere is an important mass source at Earth during periods of intense geomagnetic activity, but lesser attention has been dedicated to study the ionospheric ma…
Origin of the characteristic X-ray spectral variations of IRAS 13224-3809
Ebisawa, Ken; Mizumoto, Misaki; Sameshima, Hiroaki +1 more
The narrow-line Seyfert 1 galaxy (NLS1) IRAS 13224-3809 is known to exhibit significant X-ray spectral variation, a sharp spectral drop at ∼7 keV, strong soft excess emission, and a hint of an iron L-edge feature, which is very similar to the NLS1 1H 0707-495. We have proposed the "Variable Double Partial Covering (VDPC) model" to explain the ener…
XMM-Newton discovery of mHz quasi-periodic oscillations in the high-mass X-ray binary IGR J19140+0951
Sidoli, L.; Esposito, P.; Motta, S. E. +2 more
We report on the discovery of mHz quasi-periodic oscillations (QPOs) from the high-mass X-ray binary (HMXB) IGR J19140+0951, during a 40 ks XMM-Newton observation performed in 2015, which caught the source in its faintest state ever observed. At the start of the observation, IGR J19140+0951 was at a low flux of 2 × 10-12 erg cm-2