19 citations · 88 across the 13 of their papers we have counts for
13 papers
Crossover and Critical Behavior in the Layered XY Model
Roman Kracht, Andrea Trombettoni, Ilaria Maccari +1
Motivated by the interplay between 2D and 3D scaling signatures observed in unconventional layered superconductors, we present a systematic Monte Carlo study of the three-dimension…
Covertly Active Comet (139359) 2001 ME1
Qicheng Zhang, Quanzhi Ye, Karl Battams +3
On 2018 November 18, coronagraphs onboard the Solar and Heliospheric Observatory (SOHO) captured an unrecognized comet crossing its fields of view. We identified this comet to be t…
The Great Comet of 1106, a Chinese Comet of 1138, and Daylight Comets in late 363 As Key Objects in Computer Simulated History of Kreutz Sungrazer System
Zdenek Sekanina, Rainer Kracht
We present the results of our orbital computations in support of the recently proposed contact-binary model for the Kreutz sungrazer system (Sekanina 2021, 2022). We demonstrate th…
The Lingering Death of Periodic Near-Sun Comet 323P/SOHO
Man-To Hui, David J. Tholen, Rainer Kracht +4
We observed near-Sun comet 323P/SOHO for the first time using ground and space telescopes. In late December 2020, the object was recovered at Subaru showing no cometary features on…
Preperihelion Outbursts and Disintegration of Comet C/2017 S3 (Pan-STARRS)
Zdenek Sekanina, Rainer Kracht
A sequence of events, dominated by two outbursts and ending with the preperihelion disintegration of comet C/2017 S3, is examined. The onset times of the outbursts are determined w…
Orbital Evolution, Activity, and Mass Loss of Comet C/1995 O1 (Hale-Bopp). I. Close Encounter with Jupiter in Third Millennium BCE and Effects of Outgassing on the Comet's Motion and Physical Properties
Zdenek Sekanina, Rainer Kracht
This comprehensive study of comet C/1995 O1 focuses first on investigating its orbital motion over a period of 17.6 yr (1993-2010). The comet is suggested to have approached Jupite…
Study of a Potential Relationship Between Two Long-Period Comets and Rapid Inward Drifting of Aphelion Due to Orbital-Cascade Resonance
Zdenek Sekanina, Rainer Kracht
We study a potential genetic relationship of comets C/1846 O1 and C/1973 D1, whose apparent orbital similarity was tested by Kresak (1982) only statistically, using the Southworth-…
Pairs and Groups of Genetically Related Long-Period Comets and Probable Identity of the Mysterious Lick Object of 1921
Zdenek Sekanina, Rainer Kracht
We present the history of investigation of the dynamical properties of pairs and groups of genetically related long-period comets (other than the Kreutz sungrazing system). Members…
Was Comet C/1945 X1 (du Toit) a Dwarf, SOHO-Like Kreutz Sungrazer?
Zdenek Sekanina, Rainer Kracht
The goal of this investigation is to reinterpret and upgrade the astrometric and other data on comet C/1945 X1, the least prominent among the Kreutz system sungrazers discovered fr…
Where are the Mini Kreutz-family Comets?
Quan-Zhi Ye, Man-To Hui, Rainer Kracht +1
The Kreutz family of sungrazing comets contains over 2~000 known members, many of which are believed to be under ~m sizes (\textit{mini~comets}) and have only been studie…
Strong Erosion-Driven Nongravitational Effects in Orbital Motions of the Kreutz Sungrazing System's Dwarf Comets
Zdenek Sekanina, Rainer Kracht
We investigate the relationships among the angular orbital elements --- the longitude of the ascending node, Omega, the inclination, i, and the argument of perihelion, omega --- of…
Disintegration of Comet C/2012 S1 (ISON) Shortly Before Perihelion: Evidence from Independent Data Sets
Zdenek Sekanina, Rainer Kracht
As an Oort Cloud object with a record small perihelion distance of 2.7 Rsun and discovered more than a year before its encounter with the Sun, comet C/2012 S1 is a subject of consi…
Population of SOHO/STEREO Kreutz Sungrazers and the Arrival of Comet C/2011 W3 (Lovejoy)
Zdenek Sekanina, Rainer Kracht
We examine properties of the population of SOHO/STEREO (dwarf) Kreutz sungrazing comets from 2004 to 2013, including the arrival rates, peculiar gaps, and a potential relationship…