Separation and confirmation of showers

Neslušan, L.; Hajduková, M.

doi:10.1051/0004-6361/201629659

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…Such a method provides a general view of the location of the meteoroid stream and give statistically meaningful results. For each meteoroid that is considered as intersecting the Earth, the radiant was computed following the Neslusan et al (1998) method (the software was kindly provided by those authors). Finally, the size distribution of particles intercepting the Earth was not considered in this pa-3 http://horizons.jpl.nasa.gov per, nor was the size of modeled particles compared to the size of observed particles.…”

Section: Processing Approachmentioning

confidence: 99%

Dynamical modeling validation of parent bodies associated with newly discovered CMN meteor showers

Šegon

Vaubaillon

Gural

et al. 2017

A&A

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Context. Results from previous searches for new meteor showers in the combined Croatian Meteor Network and SonotaCo meteor databases suggested possible parent bodies for several newly identified showers. Aims. We aim to perform an analysis to validate the connection between the identified showers and candidate parent bodies. Methods. Simulated particles were ejected from candidate parent bodies, a dynamical modeling was performed and the results were compared to the real meteor shower observations. Results. From the 13 analysed cases, three were found to be connected with comets, four with asteroids which are possibly dormant comets, four were inconclusive or negative, and two need more observational data before any conclusions can be drawn.

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Section: Processing Approachmentioning

confidence: 99%

Dynamical modeling validation of parent bodies associated with newly discovered CMN meteor showers

Šegon

Vaubaillon

Gural

et al. 2017

A&A

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“…8c). This is likely the reason why the shower was not separated within our automatized separation of all showers described in our earlier paper (Neslušan & Hajduková 2017).…”

Section: Shower Corresponding To Filament F2mentioning

confidence: 87%

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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“…A common technique is to use an orbital dissimilarity criterion, such as the D-criterion, to serially associate members of a stream (Williams et al 2019). This approach is dependent on defining an acceptance threshold, which often is subjective and frequently does not account for the local background population near a shower radiant (Neslušan & Hajduková 2017).…”

Section: A New Meteor Radiant Selection Methodology Applied To the Dsxmentioning

confidence: 99%

Characterizing the Daytime Sextantids Meteor Shower and Unveiling the Nature of the Phaethon-Geminid Stream Complex

Kipreos,

Campbell-Brown,

Brown

et al. 2022

Preprint

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The Daytime Sextantids meteor shower, part of the Phaethon-Geminid Stream Complex (PGC), is closely related to the Geminids, currently the strongest meteor shower visible at the Earth. The DSX share a similar orbit to asteroid 2005 UD, but the nature of the association remains unclear. From optical data we find that DSX meteors ablate similarly to Geminids, suggesting that they are also high density and consistent with a common origin. From radar data we have isolated 19,007 DSX orbits through application of a novel convex hull approach to determine stream membership. We find at the peak the mean semi-major axis is near 1 AU, eccentricity is 0.86 and that both decrease as a function of solar longitude. The inclination averages 25 degrees at the peak but increases over time. Noticeable DSX activity extends from solar longitude 173-196 • with a flux plateau between 186 -189 • . The peak flux is 2 ± 0.05 × 10 −3 km −2 hr −1 , equivalent to a ZHR of 20. We estimate a true differential mass index for the shower of 𝑠 = 1.64 ± 0.06 at the time of peak and an average of 1.70 ± 0.07 for days surrounding the peak. The mass of the DSX stream is estimated to be 10 16 g, the same order as 2005 UD, suggesting the stream is too massive to have been created by recent meteoroid production from 2005 UD. We propose that the DSX and 2005 UD were created in the same break-up event that created 3200 Phaethon.

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Separation and confirmation of showers

Cited by 10 publications

References 32 publications

Dynamical modeling validation of parent bodies associated with newly discovered CMN meteor showers

Dynamical modeling validation of parent bodies associated with newly discovered CMN meteor showers

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

Characterizing the Daytime Sextantids Meteor Shower and Unveiling the Nature of the Phaethon-Geminid Stream Complex

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