Search Publications
ALMA Observations of Giant Molecular Clouds in M33. II. Triggered High-mass Star Formation by Multiple Gas Colliding Events at the NGC 604 Complex
Kuno, Nario; Tokuda, Kazuki; Tachihara, Kengo +13 more
We present the results of ALMA observations in 12CO(J = 2 - 1), 13CO(J = 2 - 1), and C18O(J = 2 - 1) lines and 1.3 mm continuum emission toward a massive (∼106 M⊙) giant molecular cloud associated with the giant H II region NGC 604 in one of the nearest spiral galaxies, M33, at an angular reso…
Exploring the coronal evolution of AR 12473 using time-dependent, data-driven magnetofrictional modelling
Kilpua, E. K. J.; Pomoell, J.; Price, D. J.
Aims: We present a detailed examination of the magnetic evolution of AR 12473 using time-dependent, data-driven magnetofrictional modelling.
Methods: We used maps of the photospheric electric field inverted from vector magnetogram observations, obtained by the Helioseismic and Magnetic Imager onboard the Solar Dynamics Observatory (SDO),…
Two Episodes of a Filament Eruption from a Fan-spine Magnetic Configuration
Yang, Jiayan; Hong, Junchao; Li, Haidong +1 more
In this paper, we present detailed observations of a filament eruption associated with a B6.0 flare, a jet-like coronal mass ejection (CME), and a type-III radio burst on 2013 March 2. The filament, which is located at the northwest edge of active region (AR) 11183, experienced a partial and then a full eruption. Each episode of the filament erupt…
Predicting the global far-infrared SED of galaxies via machine learning techniques
Bianchi, S.; Fritz, J.; Galliano, F. +10 more
Context. Dust plays an important role in shaping a galaxy's spectral energy distribution (SED). It absorbs ultraviolet (UV) to near-infrared radiation and re-emits this energy in the far-infrared (FIR). The FIR is essential to understand dust in galaxies. However, deep FIR observations require a space mission, none of which are still active today.…
Martian Ionopause Boundary: Coincidence With Photoelectron Boundary and Response to Internal and External Drivers
Gurnett, D. A.; Morgan, D. D.; Halekas, J. +8 more
The Martian ionopause boundary detected as steep gradients in the local electron density profiles from the Mars Advanced Radar for Subsurface and Ionospheric Sounder on Mars Express is studied individually and statistically and compared to the photoelectron boundary identified by the drop of photoelectron signature due to CO2 and O mole…
Response to a comment on Dessert et al. "The dark matter interpretation of the 3.5 keV line is inconsistent with blank-sky observations"
Safdi, Benjamin R.; Dessert, Christopher; Rodd, Nicholas L.
The dark matter explanation of the 3.5 keV line is strongly disfavored by our work in Dessert et al. (2020). Boyarsky et al. (2004) questions that conclusion: modeling additional background lines is claimed to weaken the limit sufficiently to re-allow a dark matter interpretation. We respond as follows. (1) A more conservative limit is obtained by…
An Enhancement of Jupiter's Main Auroral Emission and Magnetospheric Currents
Wilson, R. J.; Kurth, W. S.; Bagenal, F. +9 more
We present observations of Jupiter's magnetic field and plasma obtained with the NASA Juno spacecraft during February 2018, along with simultaneous Hubble Space Telescope (HST) observations of the planet's auroras. We show that a few-day transient enhancement of the azimuthal and radial magnetic fields and plasma temperature was coincident with a …
Obliquity measurement and atmospheric characterisation of the WASP-74 planetary system
Tamura, M.; Pallé, E.; Béjar, V. J. S. +27 more
We present new transit observations of the hot Jupiter WASP-74 b (Teq ~ 1860 K) using the high-resolution spectrograph HARPS-N and the multi-colour simultaneous imager MuSCAT2. We refined the orbital properties of the planet and its host star and measured its obliquity for the first time. The measured sky-projected angle between the ste…
A new and unusual LBV-like outburst from a Wolf-Rayet star in the outskirts of M33
Filippenko, Alexei V.; Kilpatrick, Charles D.; Smith, Nathan +8 more
MCA-1B (also called UIT003) is a luminous hot star in the western outskirts of M33, classified over 20 yr ago with a spectral type of Ofpe/WN9 and identified then as a candidate luminous blue variable (LBV). Palomar Transient Factory data reveal that this star brightened in 2010, with a light curve resembling that of the classic LBV star AF And in…
Asteroid mass estimation with the robust adaptive Metropolis algorithm
Granvik, M.; Siltala, L.
Context. The bulk density of an asteroid informs us about its interior structure and composition. To constrain the bulk density, one needs an estimated mass of the asteroid. The mass is estimated by analyzing an asteroid's gravitational interaction with another object, such as another asteroid during a close encounter. An estimate for the mass has…