Search Publications
Missions
Journals
Publication Years
The Weakening Outburst of the Young Eruptive Star V582 Aur
Cseh, B.; Kriskovics, L.; Pál, A. +17 more
V582 Aur is a pre-main-sequence FU Orionis type eruptive star, which entered a brightness minimum in 2016 March due to changes in the line-of-sight extinction. Here, we present and analyze new optical B, V, R C , and I C band multiepoch observations and new near-infrared J, H, and K S band photometric measurem…
A Statistical Study of the Magnetic Imprints of X-class Solar Flares
Ding, Mingde; Guo, Yang; Zhang, Yining +3 more
Magnetic imprints, the rapid and irreversible evolution of photospheric magnetic fields as feedback from flares in the corona, have been confirmed by many previous studies. These studies showed that the horizontal field will permanently increase at the polarity inversion line (PIL) after eruptions, indicating that a more horizontal geometry of the…
New photometric investigation of the low-mass-ratio contact binary star V1853 Orionis
Qian, Sheng-Bang; He, Jia-Jia; Sarotsakulchai, Thawicharat +3 more
Four-color charge-coupled device (CCD) light curves in the B, V, Rc and Ic bands of the total-eclipsing binary system V1853 Orionis (V1853 Ori) are presented. By comparing our light curves with those published by previous investigators, it is determined that the O’Connell effect on the light curves has disappeared. By analyzing those multi-color l…
Improved Chandrayaan-1 M3 data: A northwest portion of the Aristarchus Plateau and contiguous maria
Shkuratov, Yu.; Surkov, Ye.; Ivanov, M. +5 more
We provide and test a method to obtain significant improvement of available Chandrayaan-1 M3 data. The advance is achieved using the Gaussian λ-convolution of spectra and Fourier filtration of images. The main result is imagery of the reflectance across different wavelengths as well as parameters of 1 µm and 2 µm absorption …
ALMA Observations of the Molecular Gas in the Elliptical Galaxy NGC 3557
Espada, Daniel; Cepa, Jordi; Vila-Vilaro, Baltasar +3 more
We present the results of CO interferometric observations of the southern elliptical galaxy NGC 3557 with ALMA. We have detected both the CO(1-0) emission line and a relatively strong continuum at 3 mm. The continuum shows a flat-spectrum central unresolved source (at our angular resolution of 0.″7) and two jets, associated with the larger-scale e…
Asymptotic Giant Branch Stars in the Nearby Dwarf Galaxy Leo P
van Loon, J. Th.; Zijlstra, A. A.; Skillman, E. D. +7 more
We have conducted a highly sensitive census of the evolved-star population in the metal-poor dwarf galaxy Leo P and detected four asymptotic giant branch (AGB) star candidates. Leo P is one of the best examples of a nearby analog of high-redshift galaxies because of its primitive metal content (2% of the solar value), proximity, and isolated natur…
High-velocity Bullets from V Hydrae, an Asymptotic Giant Branch Star in Transition: Ejection History and Spatio-kinematic Modeling
Sahai, R.; Morris, M. R.; Scibelli, S.
The carbon star V Hydrae (V Hya) provides new insight into the nature of the launching mechanism of jet-like outflows that are believed to be the cause of the poorly understood transition phase of asymptotic giant branch stars into aspherical planetary nebulae. V Hya has been shown to periodically eject collimated gas blobs at high velocities (“bu…
Ground-based detection of a cloud of methanol from Enceladus: when is a biomarker not a biomarker?
Clements, D. L.; Drabek-Maunder, E.; Greaves, J. +2 more
aturn's moon Enceladus has vents emerging from a sub-surface ocean, offering unique probes into the liquid environment. These vents drain into the larger neutral torus in orbit around Saturn. We present a methanol (CH3OH) detection observed with IRAM 30-m from 2008 along the line-of-sight through Saturn's E-ring. Additionally, we also p…
Three-dimensional analysis of spatial resolution of MIRO/Rosetta measurements at 67P/Churyumov-Gersimenko
Shi, X.; Hartogh, P.; Rezac, L. +3 more
Context. The MIRO instrument's remote sensing capability is integral to constraining water density, temperature, and velocity fields in the coma of 67P/Churyumov-Gersimenko.
Aims: Our aim is to quantify how much water density originates from the facets of the shape model within the field of view of MIRO versus the water contribution from all …
Investigating Early-type Galaxy Evolution with a Multiwavelength Approach. III. Insights from SPH Simulations with Chemophotometric Implementation
Mazzei, Paola; Rampazzo, Roberto; Marino, Antonietta +3 more
We are exploring galaxy evolution in low-density environments exploiting smooth particle hydrodynamic simulations, including chemophotometric implementation. From a large grid of simulations of galaxy encounters and mergers starting from triaxial halos of gas and dark matter, we single out the simulations matching the global properties of our targ…