Search Publications
Mutual impedance probe in collisionless unmagnetized plasmas with suprathermal electrons - Application to BepiColombo
Henri, Pierre; Myllys, Minna; Béghin, Christian +4 more
Mutual impedance experiments are active electric probes providing in-situ space plasma measurements. Such active experiments consist of a set of electric antennas used as transmitter(s) and receivers(s) through which various dielectric properties of the plasma can be probed, giving therefore access to key plasma parameters such as, for instance, t…
Ground-based infrared mapping of H2O2 on Mars near opposition
Aoki, S.; Daerden, F.; Neary, L. +12 more
We pursued our ground-based seasonal monitoring of hydrogen peroxide on Mars using thermal imaging spectroscopy, with two observations of the planet near opposition, in May 2016 (solar longitude Ls = 148.5°, diameter = 17 arcsec) and July 2018 (Ls = 209°, diameter = 23 arcsec). Data were recorded in the 1232-1242 cm-1 range (8.1 µ…
Searches for Population III pair-instability supernovae: Impact of gravitational lensing magnification
Oguri, Masamune; Koyama, Yusei; Nomoto, Ken'ichi +3 more
Superluminous supernovae have been proposed to arise from Population III progenitors that explode as pair-instability supernovae (PISNe). Population III stars are the first generation of stars in the Universe, and are thought to have formed as late as z ∼ 6. Future near-infrared imaging facilities such as ULTIMATE-Subaru will potentially be able t…
A young multipolar planetary nebula in the making—IRAS 21282+5050
Zhang, Yong; Kwok, Sun; Hsia, Chih-Hao +1 more
We present high-angular-resolution Hubble Space Telescope (HST) optical and near-infrared imaging of the compact planetary nebula (PN) IRAS 21282+5050. Optical images of this object reveal several complex morphological structures including three pairs of bipolar lobes and an elliptical shell lying close to the plane of the sky. From near-infrared …
The nature of the infrared counterpart and of the optical nebula associated with the Central Compact Object in Vela Jr.
Pellizzoni, A.; De Luca, A.; Mignani, R. P. +3 more
The X-ray source CXO J085201.4-461753 in the few kyr-old Vela Jr. supernova remnant (SNR, G266.2-1.2) belongs to the peculiar class of isolated neutron stars dubbed `Central Compact Objects' (CCOs). At variance with the other CCOs, which are only detected in the X-rays, CXO J085201.4-461753 has been possibly detected also at other wavelengths. In …
Hot Plasma in a Quiescent Solar Active Region as Measured by RHESSI, XRT, and AIA
Krucker, Säm; Ishikawa, Shin-nosuke
This paper investigates a quiescent (nonflaring) active region observed on 2010 July 13 in extreme ultraviolet (EUV), soft X-ray (SXR), and hard X-rays to search for a hot component that is speculated to be a key signature of coronal heating. We use a combination of Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) imaging and long-dur…
Generation of kinetic Alfvén waves in dayside magnetopause reconnection: A 3-D global-scale hybrid simulation
Wang, Xueyi; Lin, Yu; Guo, Zhifang +1 more
In this paper, we perform a three-dimensional (3-D) global-scale hybrid simulation to investigate the generation of kinetic Alfvén waves (KAWs) in reconnection at the dayside magnetopause. In the simulation, the magnetopause reconnection takes place due to a self-consistent interaction between the solar wind and Earth's magnetosphere, in which the…
Diagnosing the Clumpy Protoplanetary Disk of the UXor Type Young Star GM Cephei
Neuhäuser, R.; Chen, W. P.; Mugrauer, M. +30 more
UX Orionis stars (UXors) are Herbig Ae/Be or T Tauri stars exhibiting sporadic occultation of stellar light by circumstellar dust. GM Cephei is such a UXor in the young (∼4 Myr) open cluster Trumpler 37, showing prominent infrared excess, emission-line spectra, and flare activity. Our photometric monitoring (2008-2018) detects (1) an ∼3.43 day per…
Auroral Beads at Saturn and the Driving Mechanism: Cassini Proximal Orbits
Roussos, E.; Badman, S. V.; Bonfond, B. +9 more
During the Grand Finale Phase of Cassini, the Ultraviolet Imaging Spectrograph on board the spacecraft detected repeated detached small-scale auroral structures. We describe these structures as auroral beads, a term introduced in the terrestrial aurora. Those on DOY 232 2017 are observed to extend over a large range of local times, i.e., from 20 L…
Slow decline and rise of the broad [O III] emission line in globular cluster black hole candidate RZ2109
Kundu, Arunav; Strader, Jay; Dage, Kristen C. +6 more
RZ2109 is the first of several extragalactic globular clusters shown to host an ultraluminous X-ray source. RZ2109 is particularly notable because optical spectroscopy shows it has broad, luminous [O III] λλ4959,5007 emission, while also having no detectable hydrogen emission. The X-ray and optical characteristics of the source in RZ2109 make it a…