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General relativistic pulsations of ultra-massive ZZ Ceti stars
Kepler, S. O.; Córsico, Alejandro H.; Althaus, Leandro G. +4 more
Ultra-massive white dwarf stars are currently being discovered at a considerable rate, thanks to surveys such as the Gaia space mission. These dense and compact stellar remnants likely play a major role in Type Ia supernova explosions. It is possible to probe the interiors of ultra-massive white dwarfs through asteroseismology. In the case of the …
Blending from binarity in microlensing searches toward the Large Magellanic Cloud
Moniez, M.; Blaineau, T.
Context. Studies of gravitational microlensing effects require the estimation of their detection efficiency as soon as one wants to quantify the massive compact objects along the line of sight of source targets. This is particularly important for setting limits on the contribution of massive compact objects to the Galactic halo. These estimates of…
Decomposition of the central structure of NGC 2273 in the NIR: A case study
Quirrenbach, A.; Gredel, R.; Thompson, D. +11 more
The Seyfert 2 galaxy NGC 2273 is a prime target to explore how active nuclei can be fed. It has a star‑forming innermost nuclear ring with a radius of 0.33kpc from where material may be funneled to the supermassive black hole in its center. In this article, we discuss high‑resolution adaptive optics aided JHKs images of NGC 2273 taken with the Lar…
Physical Properties of the Young Asteroid Pair 2010 UM26 and 2010 RN221
Mutchler, Max; Jewitt, David; Li, Jing +1 more
The main belt asteroids 458271 (2010 UM26) and 2010 RN221 share almost identical orbital elements, and currently appear as comoving objects ~30″ apart in the plane of the sky. They are products of the breakup of a parent object, or the splitting of a binary, with a separation age measured in decades rather than thousands or millions of years as fo…
Spectroscopic and Photometric Observations of the Supernovae SN2020JEE
Ismailov, N. Z.; Khalilov, O. V.; Mikhailov, Kh. M. +2 more
Information on the SN2020jee supernova is first listed in the web page Gaia Alert Index list (http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia20cgo/). These data are as follows: date of observation 2020-05-13 UT 08:17:40 (JD 2458982.85), with coordinates RA (2000) = 11: 42: 14.70 DEC (2000) = 20: 05: 51.07. The object is located approximately in the …
Reconstruction of total solar irradiance variability as simultaneously apparent from Solar Orbiter and Solar Dynamics Observatory
Schmidt, W.; Woch, J.; Solanki, S. K. +42 more
Solar irradiance variability has been monitored almost exclusively from the Earth's perspective. We present a method to combine the unprecedented observations of the photospheric magnetic field and continuum intensity from outside the Sun-Earth line, which is being recorded by the Polarimetric and Helioseismic Imager on board the Solar Orbiter mis…
De la loi de la gravitation universelle à MICROSCOPE
Rodrigues, Manuel
Preface for special issue on the Colour and Stereo Surface Imaging System (CaSSIS) at Mars
Sefton-Nash, Elliot; Wilson, Colin; Hauber, Ernst +2 more
The Colour and Stereo Surface Imaging System (CaSSIS) is the main camera on board the ExoMars Trace Gas Orbiter (TGO). Following launch of TGO on 14 March 2016, CaSSIS began nominal science operations in April 2018. At the time of writing CaSSIS has acquired an average of 21 observations per day, totaling 20.5 Tbits of downlinked telemetry, and ha…
Empirical 2MASS-WFC3/IR Filter Transformations Across the H-R Diagram from Synthetic Photometry
Dalcanton, J. J.; Durbin, M. J.; Beaton, R. L. +2 more
Near-infrared bandpasses on spaceborne observatories diverge from their ground-based counterparts as they are free of atmospheric telluric absorption. Available transformations between respective filter systems in the literature rely on theoretical stellar atmospheres, which are known to have difficulties reproducing the observed spectral energy d…
The sdBV+dM close-to-synchronization binary TIC 137608661: inclination and thin disk population
Silvotti, Roberto
TIC 137608661 is a new sdBV+dM reflection-effect binary discovered by the TESS space mission with an orbital period of 7.21 hours. In addition to the detailed study of this system that was recently published (Silvotti et al., 2022), this article contains a further discussion on its inclination. Moreover, from the 3D space velocities of the binary …