Search Publications
Formation of Post-CME Blobs Observed by LASCO-C2 and K-Cor on 2017 September 10
Lee, Kyoung-Sun; Jang, Soojeong; Cho, Kyung-Suk +6 more
Understanding the formation of post-CME blobs, we investigate 2 blobs in the outer corona observed by LASCO-C2 and 34 blobs in the inner corona by K-Cor on 2017 September 10 from 17:11 to 18:58 UT. By visual inspection of the structure of a post-CME current sheet (CS) and its associated blobs, we find that the CS is well identified in the K-Cor an…
Measurement of the B-band galaxy Luminosity Function with Approximate Bayesian Computation
Tortorelli, Luca; Herbel, Jörg; Amara, Adam +3 more
The galaxy Luminosity Function (LF) is a key observable for galaxy formation, evolution studies and for cosmology. In this work, we propose a novel technique to forward model wide-field broad-band galaxy surveys using the fast image simulator UFig and measure the LF of galaxies in the B-band. We use Approximate Bayesian Computation (ABC) to constr…
An ALMA/NOEMA study of gas dissipation and dust evolution in the 5 Myr-old HD 141569A hybrid disc
Augereau, J. -C.; Boccaletti, A.; Chapillon, E. +5 more
Context. The study of gas-rich debris discs is fundamental to characterising the transition between protoplanetary discs and debris discs.
Aims: We determine the physical parameters of the brightest gas-rich debris disc orbiting HD 141569A.
Methods: We analyse images from the NOrthern Extended Millimeter Array (NOEMA)1 and the…
A charging model for the Rosetta spacecraft
Henri, P.; Eriksson, A. I.; Johansson, F. L. +5 more
Context. The electrostatic potential of a spacecraft, VS, is important for the capabilities of in situ plasma measurements. Rosetta has been found to be negatively charged during most of the comet mission and even more so in denser plasmas.
Aims: Our goal is to investigate how the negative VS correlates with electron den…
Optical polarization properties of AGNs with significant VLBI-Gaia offsets
Blinov, D.; Kovalev, Y. Y.; Zobnina, D. I. +1 more
Significant positional offsets of the value from 1 mas to more than 10 mas were found previously between radio (VLBI) and optical (Gaia) positions of active galactic nuclei (AGNs). They happen preferentially parallel to the parsec-scale jet direction. AGNs with VLBI-to-Gaia offsets pointed downstream the jet are found to have favourably higher opt…
The MASSIVE Survey XIV—Stellar Velocity Profiles and Kinematic Misalignments from 200 pc to 20 kpc in Massive Early-type Galaxies
Ma, Chung-Pei; Greene, Jenny E.; Blakeslee, John P. +3 more
We use high spatial resolution stellar velocity maps from the Gemini integral-field spectrograph (IFS) and wide-field velocity maps from the McDonald Mitchell IFS to study the stellar velocity profiles and kinematic misalignments from ∼200 pc to ∼20 kpc in 20 early-type galaxies (ETGs) with stellar mass M* > 1011.7M⊙<…
Truth or Delusion? A Possible Gravitational Lensing Interpretation of the Ultraluminous Quasar SDSS J010013.02+280225.8 at z = 6.30
Ouchi, Masami; Fujimoto, Seiji; Oguri, Masamune +2 more
Gravitational lensing sometimes dominates the observed properties of apparently very bright objects. We present morphological properties in the high-resolution (FWHM ∼ 0"15) Atacama Large Millimeter/submillimeter Array (ALMA) 1 mm map for an ultraluminous quasar at z = 6.30, SDSS J010013.02+280225.8 (hereafter J0100+2802), whose black hole (BH) ma…
Longitudinal filament oscillations enhanced by two C-class flares
Guo, J. H.; Zhang, Q. M.; Xu, A. A. +1 more
Context. Large-amplitude, longitudinal filament oscillations triggered by solar flares have been well established in the literature. However, filament oscillations enhanced by flares have never been reported.
Aims: In this paper we report the multiwavelength observations of a very long filament in active region (AR) 11112 on 2010 October 18. …
FOXSI-2 Solar Microflares. I. Multi-instrument Differential Emission Measure Analysis and Thermal Energies
Krucker, Säm; Narukage, Noriyuki; Musset, Sophie +8 more
In this paper we present the differential emission measures (DEMs) of two sub-A class microflares observed in hard X-rays (HXRs) by the FOXSI-2 sounding rocket experiment, on 2014 December 11. The second Focusing Optics X-ray Solar Imager (FOXSI) flight was coordinated with instruments X-ray Telescope (Hinode/XRT) and Solar Dynamics Observatory/At…
Ultra-luminous quasars at redshift z > 4.5 from SkyMapper
Wolf, Christian; Schmidt, Brian P.; Bian, Fuyan +6 more
The most luminous quasars at high-redshift harbour the fastest growing and most massive black holes in the early Universe. They are exceedingly rare and hard to find. Here, we present our search for the most luminous quasars in the redshift range from z = 4.5 to 5 using data from SkyMapper, Gaia, and WISE. We use colours to select likely high-reds…