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We derive the absolute physical and orbital parameters for a sample of 18 detached eclipsing binaries from the \emph{All Sky Automated Survey} (ASAS) database based on the available photometry and our own radial velocity measurements. The…

太阳与恒星天体物理 · 物理学 2015-05-14 K. G. Hełminiak , M. Konacki , M. Ratajczak , M. Muterspaugh

The Asteroid Terrestrial-impact Last Alert System (ATLAS) is an all-sky survey primarily aimed at detecting potentially hazardous near-Earth asteroids. Apart from the astrometry of asteroids, it also produces their photometric measurements…

地球与行星天体物理 · 物理学 2020-11-04 J. Durech , J. Tonry , N. Erasmus , L. Denneau , A. N. Heinze , H. Flewelling , R. Vanco

We probed the surface environment of large ($>$80 km in diameter) T-type asteroids, a taxonomic type relatively ill-constrained as an independent group, and discussed their place of origin. We performed spectroscopic observations of two…

地球与行星天体物理 · 物理学 2022-10-26 Yuna G. Kwon , Sunao Hasegawa , Sonia Fornasier , Masateru Ishiguro , Jessica Agarwal

We conducted a polarimetric observation of the fast-rotating near-Earth asteroid (1566) Icarus at large phase (Sun-asteroid-observer's) angles $\alpha$= 57 deg--141deg around the 2015 summer solstice. We found that the maximum values of the…

We present a comparison of our results from ground-based observations of asteroid (21) Lutetia with imaging data acquired during the flyby of the asteroid by the ESA Rosetta mission. This flyby provided a unique opportunity to evaluate and…

The Euclid mission is a visionary project undertaken by the European Space Agency (ESA) to probe the universe's evolution and geometry by surveying the position and gravitational shape distortion of billions of galaxies. These observations…

宇宙学与河外天体物理 · 物理学 2024-09-17 Davide Sciotti

The majority of basaltic asteroids are found in the inner main belt, although a few have also been observed in the outer main belt and near-Earth space. These asteroids -referred to as V-types- have surface compositions that resemble that…

地球与行星天体物理 · 物理学 2015-05-19 S. Marchi , M. C. De Sanctis , M. Lazzarin , S. Magrin

The YORP effect is a small thermal-radiation torque experienced by small asteroids, and is considered to be crucial in their physical and dynamical evolution. It is important to understand this effect by providing measurements of YORP for a…

地球与行星天体物理 · 物理学 2021-09-09 Tarik J. Zegmott , S. C. Lowry , A. Rożek , B. Rozitis , M. C. Nolan , E. S. Howell , S. F. Green , C. Snodgrass , A. Fitzsimmons , P. R. Weissman

The most accurate stellar astrophysical parameters were collected from the solutions of the light and the radial velocity curves of 257 detached double-lined eclipsing binaries in the Milky Way. The catalogue contains masses, radii, surface…

太阳与恒星天体物理 · 物理学 2015-06-19 Z. Eker , S. Bilir , F. Soydugan , E. Yaz Gokce , E. Soydugan , M. Tuysuz , T. Senyuz , O. Demircan

The alpha decay of $^{151}$Eu to the first excited level of $^{147}$Pm ($J^\pi = 5/2^+$, $E_{exc}=91.1$ keV) was searched for at the HADES underground laboratory ($\approx 500$ m w.e.). A sample of high purity europium oxide with mass of…

核实验 · 物理学 2013-01-16 F. A. Danevich , E. Andreotti , M. Hult , G. Marissens , V. I. Tretyak , A. Yuksel

Echelle spectra of 10 bright asteroids are presented and compared against an observed twilight spectrum and a computed Solar spectrum. Spectra covering a 2130 A spectral range centered on 5785 A are of high resolving power and high signal…

天体物理学 · 物理学 2009-11-11 Tomaz Zwitter , Francois Mignard , Francoise Crifo

Near-Earth asteroid (275677) 2000 RS11 was observed over 5 days in March 2014 with both the Arecibo (2380 MHz, 12.6 cm) and Goldstone (8560 MHz, 3.5 cm) planetary radar systems. The continuous-wave spectra and delay-Doppler images collected…

The physical characterization of potentially hazardous asteroids (PHAs) is important for impact hazard assessment and evaluating mitigation options. Close flybys of PHAs provide an opportunity to study their surface photometric and spectral…

The Main Belt asteroid (203) Pompeja shows evidence of extreme variability in visible and near-infrared spectral slope with time. The observed spectral variability has been hypothesized to be attributed to spatial variations across…

地球与行星天体物理 · 物理学 2024-12-11 Oriel A. Humes , Josef Hanuš

Photometry results of 32 asteroids are reported from only seven observing nights on only seven fields, consisting of 34.11 cumulative hours of observations. The data were obtained with a wide-field CCD (40.5'x27.3') mounted on a small,…

天体物理学 · 物理学 2009-11-13 D. Polishook , N. Brosch

The larger number of models of asteroid shapes and their rotational states derived by the lightcurve inversion give us better insight into both the nature of individual objects and the whole asteroid population. With a larger statistical…

地球与行星天体物理 · 物理学 2013-01-30 J. Hanuš , J. Ďurech , M. Brož , A. Marciniak , B. D. Warner , F. Pilcher , R. Stephens , R. Behrend , B. Carry , D. Čapek , P. Antonini , M. Audejean , K. Augustesen , E. Barbotin , P. Baudouin , A. Bayol , L. Bernasconi , W. Borczyk , J. -G. Bosch , E. Brochard , L. Brunetto , S. Casulli , A. Cazenave , S. Charbonnel , B. Christophe , F. Colas , J. Coloma , M. Conjat , W. Cooney , H. Correira , V. Cotrez , A. Coupier , R. Crippa , M. Cristofanelli , Ch. Dalmas , C. Danavaro , C. Demeautis , T. Droege , R. Durkee , N. Esseiva , M. Esteban , M. Fagas , G. Farroni , M. Fauvaud , S. Fauvaud , F. Del Freo , L. Garcia , S. Geier , C. Godon , K. Grangeon , H. Hamanowa , H. Hamanowa , N. Heck , S. Hellmich , D. Higgins , R. Hirsch , M. Husarik , T. Itkonen , O. Jade , K. Kamiński , P. Kankiewicz , A. Klotz , R. A. Koff , A. Kryszczyńska , T. Kwiatkowski , A. Laffont , A. Leroy , J. Lecacheux , Y. Leonie , C. Leyrat , F. Manzini , A. Martin , G. Masi , D. Matter , J. Michałowski , M. J. Michałowski , T. Michałowski , J. Michelet , R. Michelsen , E. Morelle , S. Mottola , R. Naves , J. Nomen , J. Oey , W. Ogloza , A. Oksanen , D. Oszkiewicz , P. Pääkkönen , M. Paiella , H. Pallares , J. Paulo , M. Pavic , B. Payet , M. Polińska , D. Polishook , R. Poncy , Y. Revaz , C. Rinner , M. Rocca , A. Roche , D. Romeuf , R. Roy , H. Saguin , P. A. Salom , S. Sanchez , G. Santacana , T. Santana-Ros , J. -P. Sareyan , K. Sobkowiak , S. Sposetti , D. Starkey , R. Stoss , J. Strajnic , J. -P. Teng , B. Tregon , A. Vagnozzi , F. P. Velichko , N. Waelchli , K. Wagrez , H. Wücher

The Chinese Small Telescope ARray (CSTAR) has observed an area around the Celestial South Pole at Dome A since 2008. About $20,000$ light curves in the i band were obtained lasting from March to July, 2008. The photometric precision…

Asteroid pairs had a single progenitor that split due to rotational-fission of a weak, rubble-pile structured body. By constructing shape models of asteroid pairs from multiple-apparition observations and using a lightcurve inversion…

地球与行星天体物理 · 物理学 2019-11-06 David Polishook , Oded Aharonson

We homogeneously measured the elliptical shapes of 163 globular clusters (GCs) using the on-sky distribution of their cluster members and the third data release of the ESA mission Gaia (DR3). The astrometry enables the differentiation of…

星系天体物理 · 物理学 2024-08-02 Mauricio Cruz Reyes , Richard I. Anderson

We present a new non-convex model of the 90 Antiope binary asteroid, derived with a modified version of the SAGE (Shaping Asteroids with Genetic Evolution) method using disk-integrated photometry only. A new variant of the SAGE algorithm…

地球与行星天体物理 · 物理学 2019-04-25 P. Bartczak , T. Michałowski , T. Santana-Ros , G. Dudziński