The August θ‐Aquillid fireballs and possible relationship with the asteroid 2004MB6

Кохирова, Г. И.; Бабаджанов, П. Б.

doi:10.1111/maps.12431

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…The alteration of the initial orbital corridor can be revealed by modeling the stream and studying its dynamical evolution for a suitably long period. Meteoroid streams of several parent bodies were studied with the help of various stream models (e.g., Asher & Emel'yanenko 2002;Lyytinen & Jenniskens 2003;Wiegert et al 2005;Vaubaillon et al 2005a,b;Vaubaillon & Jenniskens 2007;Kaňuchová & Neslušan 2007, Asher 2008, Jenniskens & Vaubaillon (2010; Vereš et al 2011;Jopek & Williams 2013;Sekhar & Asher 2013;2014a,b;Neslušan et al 2013a,b;Neslušan & Hajduková 2014;Babadzhanov et al 2008Babadzhanov et al , 2013Babadzhanov et al , 2015aJakubík & Neslušan 2015;Kasuga & Jewitt 2015;Kokhirova & Babadzhanov 2015;Kornoš et al 2015;Rudawska & Vaubaillon 2015;Ryabova 2007Ryabova , 2016Tomko & Neslušan 2012Micheli et al 2016;Abedin et al 2015Abedin et al , 2017.…”

Section: Introductionmentioning

confidence: 99%

Regular and transitory showers of comet C/1979 Y1 (Bradfield)

Hajduková

Neslušan

2017

A&A

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Aims. We intend to map the whole meteor complex of the long-period comet C/1979 Y1 (Bradfield), which is a proposed parent body of the July Pegasids, No. 175 in the list of meteor showers established by the Meteor Data Center (MDC) of the International Astronomical Union (IAU). Methods. For five perihelion passages of the parent comet in the past, we model associated theoretical stream, its parts, each consisting of 10 000 test particles, and follow the dynamical evolution of these parts up to the present. Subsequently, we analyze the mean orbital characteristics of those particles of the parts that approach the Earth's orbit and, thus, create a shower or showers. The showers are compared with their observed counterparts separated from photographic, radio, and several video databases. Results. The modeled stream of C/1979 Y1 approaches the Earth's orbit in two filaments that correspond to two regular (annual) showers. We confirm the generic relationship between the studied parent comet and 175 July Pegasids. The other predicted shower is a daytime shower with the mean radiant situated symmetrically to the July Pegasids with respect to the apex of the Earth's motion. This shower is not in the IAU MDC list, but we separated it from the Cameras-for-Allsky-Meteor-Surveillance (CAMS) and SonotaCo video data as a new shower. We suggest naming it α-Microscopiids. The stronger influence of the Poynting-Robertson drag deflects the stream away from the Earth's orbit in those sections that correspond to the July Pegasids and the predicted daytime shower, but it makes the stream cross the Earth's orbit in other sections. Corresponding showers are, however, only expected to survive during a limited period and to consist of particles of sizes in a narrow interval. We identified one of these "transitory" filaments to the 104 γ-Bootids in the IAU MDC list of meteor showers.

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Section: Introductionmentioning

confidence: 99%

Regular and transitory showers of comet C/1979 Y1 (Bradfield)

Hajduková

Neslušan

2017

A&A

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“…Yeomans 1981;Brown 1999) and a couple of potential dormant comets (e.g. Babadzhanov et al 2012;Kokhirova & Babadzhanov 2015).…”

Section: Introductionmentioning

confidence: 99%

When Comets Get Old: A Synthesis of Comet and Meteor Observations of the Low Activity Comet 209P/LINEAR

Ye,

Hui,

Brown

et al. 2015

Preprint

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It is speculated that some weakly active comets may be transitional objects between active and dormant comets. These objects are at a unique stage of the evolution of cometary nuclei, as they are still identifiable as active comets, in contrast to inactive comets that are observationally indistinguishable from low albedo asteroids. In this paper, we present a synthesis of comet and meteor observations of Jupiter-family comet 209P/LINEAR, one of the most weakly active comets recorded to-date. Images taken by the Xingming 0.35-m telescope and the Gemini Flamingo-2 camera are modeled by a Monte Carlo dust model, which yields a low dust ejection speed (1/10 of that of moderately active comets), dominance of large dust grains, and a low dust production of 0.4 kg • s −1 at 19 d after the 2014 perihelion passage. We also find a reddish nucleus of 209P/LINEAR that is similar to D-type asteroids and most Trojan asteroids. Meteor observations with the Canadian Meteor Orbit Radar (CMOR), coupled with meteoroid stream modeling, suggest a low dust production of the parent over the past few hundred orbits, although there are hints of a some temporary increase in activity in the 18th century. Dynamical simulations indicate 209P/LINEAR may have resided in a stable near-Earth orbit for ∼ 10 4 yr, which is significantly longer than typical JFCs. All these lines of evidence imply that 209P/LINEAR as an aging comet quietly exhausting its remaining near surface volatiles. We also compare 209P/LINEAR to other low activity comets, where evidence for a diversity of the origin of low activity is seen.

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When comets get old: A synthesis of comet and meteor observations of the low activity comet 209P/LINEAR

Hui

Brown

et al. 2016

Icarus

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a b s t r a c tIt is speculated that some weakly active comets may be transitional objects between active and dormant comets. These objects are at a unique stage of the evolution of cometary nuclei, as they are still identifiable as active comets, in contrast to inactive comets that are observationally indistinguishable from low albedo asteroids. In this paper, we present a synthesis of comet and meteor observations of Jupiter-family Comet 209P/LINEAR, one of the most weakly active comets recorded to-date. Images taken by the Xingming 0.35-m telescope and the Gemini Flamingo-2 camera are modeled by a Monte Carlo dust model, which yields a low dust ejection speed (1/10 of that of moderately active comets), dominance of large dust grains, and a low dust production of 0:4 kg s À1 at 19 d after the 2014 perihelion passage. We also find a reddish nucleus of 209P/LINEAR that is similar to D-type asteroids and most Trojan asteroids. Meteor observations with the Canadian Meteor Orbit Radar (CMOR), coupled with meteoroid stream modeling, suggest a low dust production of the parent over the past few hundred orbits, although there are hints of a some temporary increase in activity in the 18th century. Dynamical simulations indicate 209P/LINEAR may have resided in a stable near-Earth orbit for $ 10 4 yr, which is significantly longer than typical JFCs. All these lines of evidence imply that 209P/LINEAR as an aging comet quietly exhausting its remaining near surface volatiles. We also compare 209P/LINEAR to other low activity comets, where evidence for a diversity of the origin of low activity is seen.

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The August θ‐Aquillid fireballs and possible relationship with the asteroid 2004MB6

Cited by 5 publications

References 32 publications

Regular and transitory showers of comet C/1979 Y1 (Bradfield)

Regular and transitory showers of comet C/1979 Y1 (Bradfield)

When Comets Get Old: A Synthesis of Comet and Meteor Observations of the Low Activity Comet 209P/LINEAR

When comets get old: A synthesis of comet and meteor observations of the low activity comet 209P/LINEAR

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