Search Publications
Contributions of Rotation, Expansion and Line Broadening to the Morphology and Kinematics of the Inner CSE of Oxygen-rich AGB Star R Hya
Diep, Pham Ngoc; Ngoc, Nguyen Bich; Nhung, Pham Tuyet +4 more
We use archival ALMA observations of the CO(2-1) and SiO(5-4) molecular line emissions of AGB star R Hya to illustrate the relative contributions of rotation, expansion and line broadening to the morphology and kinematics of the circumstellar envelope (CSE) within some ~70 au (~0.″5) from the centre of the star. We give evidence for rotation and i…
Forgotten treasures in the HST/FOC UV imaging polarimetric archives of active galactic nuclei. I. Pipeline and benchmarking against NGC 1068 and exploring IC 5063
Kishimoto, M.; Lopez-Rodriguez, E.; Marin, F. +2 more
Context. Over its 13 yr of operation (1990-2002), the Faint Object Camera (FOC) on board the Hubble Space Telescope (HST) observed 26 individual active galactic nuclei (AGNs) in ultraviolet (UV) imaging polarimetry. However, not all of the observations have been reduced and analyzed or set within a standardized framework.
Aims: We plan to red…
Discovery of a massive giant planet with extreme density around the sub-giant star TOI-4603
Bieryla, Allyson; Latham, David W.; Ciardi, David R. +11 more
We present the discovery of a transiting massive giant planet around TOI-4603, a sub-giant F-type star from NASA's Transiting Exoplanet Survey Satellite (TESS). The newly discovered planet has a radius of 1.042−0.035+0.038 RJ and an orbital period of 7.24599−0.00021+0.00022 days. Using radial …
Examining Neutrino-Matter Interactions in the Cassiopeia A Supernova
Sato, Toshiki; Hughes, John P.; Yoshida, Takashi +4 more
Neutrino interactions with stellar material are widely believed to be fundamental to the explosion of massive stars. However, this important process has remained difficult to confirm observationally. We propose a new method to verify it using X-ray observations of the supernova remnant Cassiopeia A. The elemental composition in its Fe-rich ejecta …
Origins of B-type stars at high Galactic latitudes based on abundances and kinematics
Zhao, Gang; Liu, Chao; Liu, Zhicun +3 more
The spectral analysis and kinematic studies of faint blue stars of O and B types above the mid-plane of the Milky Way can lead to a better understanding of their populations and origins. In this paper, we present an analysis of the chemical composition and kinematics of 17 B-type stars. Our sample includes 13 B-type stars with |Z| > 0.5 kpc and…
The MUSE-Faint survey. III. Constraining scalar field dark matter with Antlia B
Bouché, Nicolas; Boogaard, Leindert A.; Brinchmann, Jarle +7 more
Aims: We use the stellar line-of-sight velocities of Antlia B (Ant B), a faint dwarf galaxy in the NGC 3109 association, to derive constraints on the fundamental properties of scalar field dark matter (SFDM), which was originally proposed to solve the small-scale problems faced by cold dark matter models.
Methods: We used the first spect…
A large sample of newly identified carbon-deficient red giants from APOGEE
Zhao, Gang; Campbell, Simon W.; Reddy, Bacham E. +2 more
Based on the Apache Point Observatory Galactic Evolution Experiment survey we conducted a search for carbon-deficient red giants (CDGs). We found 103 new CDGs, increasing the number in the literature by more than a factor of 3. CDGs are very rare, representing 0.03 per cent of giants. They appear as an extended tail off the normal carbon distribut…
Statistics of Magrathea exoplanets beyond the main sequence. Simulating the long-term evolution of circumbinary giant planets with TRES
Columba, G.; Toonen, S.; Danielski, C. +2 more
Context. Notwithstanding the tremendous growth of the field of exoplanets in the last decade, limited attention has been paid to the planets around binary stars, which represent a small fraction of the total discoveries to date. Circumbinary planets (CBPs) have been discovered primarily with transit and eclipse timing variation methods, mainly aro…
Photometric Catalogue for Space and Ground Night-Time Remote-Sensing Calibration: RGB Synthetic Photometry from Gaia DR3 Spectrophotometry
Zamorano, Jaime; Masana, Eduard; Carrasco, Josep Manel +5 more
Recent works have made strong efforts to produce standardised photometry in RGB bands. For this purpose, we carefully defined the transmissivity curves of RGB bands and defined a set of standard sources using the photometric information present in Gaia EDR3. This work aims not only to significantly increase the number and accuracy of RGB standards…
Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere: First results from PHI on board Solar Orbiter
Woch, J.; Solanki, S. K.; Schou, J. +31 more
Context. In November 2021, Solar Orbiter started its nominal mission phase. The remote-sensing instruments on board the spacecraft acquired scientific data during three observing windows surrounding the perihelion of the first orbit of this phase.
Aims: The aim of the analysis is the detection of magnetohydrodynamic (MHD) wave modes in an act…