Search Publications
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
Is the flow-aligned component of IMF really able to impact the magnetic field structure of Venusian magnetotail?
Barabash, S.; Futaana, Y.; Wei, Y. +5 more
An earlier statistical survey suggested that the flow-aligned component of upstream interplanetary magnetic field (IMF) may play an important role in controlling the lobe asymmetries of the Venusian magnetotail. The tail current sheet would be displaced and the magnetic field configuration would show asymmetries with respect to the current sheet. …
Maps of the Magellanic Clouds from Combined South Pole Telescope and PLANCK Data
Bleem, L. E.; Stark, A. A.; George, E. M. +39 more
We present maps of the Large and Small Magellanic Clouds from combined South Pole Telescope (SPT) and Planck data. The Planck satellite observes in nine bands, while the SPT data used in this work were taken with the three-band SPT-SZ camera, The SPT-SZ bands correspond closely to three of the nine Planck bands, namely those centered at 1.4, 2.1, …
The Role of Quenching Time in the Evolution of the Mass-size Relation of Passive Galaxies from the Wisp Survey
Zanella, A.; Scarlata, C.; Malkan, M. +13 more
We analyze how passive galaxies at z ∼ 1.5 populate the mass-size plane as a function of their stellar age, to understand if the observed size growth with time can be explained with the appearance of larger quenched galaxies at lower redshift. We use a sample of 32 passive galaxies extracted from the Wide Field Camera 3 Infrared Spectroscopic Para…
The 2015 hard-state only outburst of GS 1354-64
Stiele, H.; Kong, A. K. H.
Since its outburst in 1997, GS 1354-64 stayed in quiescence. In 2015 June, renewed activity of GS 1354-64 was observed. Based on our analysis of energy spectra and timing properties obtained from Swift/X-ray telescope monitoring data, we found that GS 1354-64 stayed in the hard state during the entire outburst. Such a hard state only (or `failed' …