J/A+A/598/A40 Separation and confirmation of showers (Neslusan+, 2017)
The separation and confirmation of showers.
Neslusan L., Hajdukova M.Jr.
<Astron. Astrophys. 598, A40 (2017)>
=2017A&A...598A..40N 2017A&A...598A..40N (SIMBAD/NED BibCode)
ADC_Keywords: Comets
Keywords: meteorites, meteors, meteoroids - catalogs - methods: data analysis
Abstract:
Using IAU MDC photographic, IAU MDC CAMS video, SonotaCo video, and
EDMOND video databases, we aim to separate all provable annual meteor
showers from each of these databases. We intend to reveal the problems
inherent in this procedure and answer the question whether the
databases are complete and the methods of separation used are
reliable. We aim to evaluate the statistical significance of each
separated shower. In this respect, we intend to give a list of
reliably separated showers rather than a list of the maximum possible
number of showers.
Description:
To separate the showers, we simultaneously used two methods. The use
of two methods enables us to compare their results, and this can
indicate the reliability of the methods. To evaluate the statistical
significance, we suggest a new method based on the ideas of the
break-point method.
We give a compilation of the showers from all four databases using
both methods. Using the first (second) method, we separated 107 (133)
showers, which are in at least one of the databases used. These
relatively low numbers are a consequence of discarding any candidate
shower with a poor statistical significance. Most of the separated
showers were identified as meteor showers from the IAU MDC list of all
showers. Many of them were identified as several of the showers in the
list. This proves that many showers have been named multiple times
with different names.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 144 107 *The characteristics of the showers separated
from the used databases by the MoI method
tablea2.dat 144 133 *The characteristics of the showers separated
from the used databases by the MoR& method
--------------------------------------------------------------------------------
Note on tablea1.dat: MoI : method of indices (Svoren et al.,
2000, Planet. Space Sci., 48, 933).
Note on tablea2.dat: MoR& : method suggested and described by Rudawska et al.
(2015, Planet. Space Sci., 118, 38).
--------------------------------------------------------------------------------
See also:
J/A+A/287/990 : Meteor stream activity. I. (Jenniskens 1994)
J/A+A/295/206 : Meteor stream activity. II. (Jenniskens, 1995)
J/A+A/320/631 : Meteor streams detected among 502TV (Jopek+ 1997)
J/A+AS/128/179 : Precision meteor orbits (Betlem+ 1998)
J/A+A/580/A67 : Catalogue of representative meteor spectra (Vojacek+, 2015)
Byte-by-byte Description of file: tablea1.dat tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Shower Shower number and abbreviation in the IAU MDC
list of showers or our number
11- 12 A2 --- Class Class of reliability
15 A1 --- DB Database from which the listed shower was
separated (1)
18- 22 F5.1 deg lambdaSun Mean solar longitude
24- 28 F5.1 deg e_lambdaSun rms uncertainty on lambdaSun
30- 34 F5.3 AU q Mean perihelion distance
36- 40 F5.3 AU e_q rms uncertainty on q
43- 47 F5.3 --- e Mean eccentricity
49- 53 F5.3 --- e_e rms uncertainty on e
56- 60 F5.1 deg omega Mean argument of perihelion
62- 65 F4.1 deg e_omega rms uncertainty on omega
68- 72 F5.1 deg Omega Mean longitude of ascending node
74- 77 F4.1 deg e_Omega rms uncertainty on Omega
80- 84 F5.1 deg i Mean inclination to the ecliptic
86- 89 F4.1 deg e_i rms uncertainty on i
92- 96 F5.1 deg RAg Mean right ascension of geocentric radiant
98-102 F5.1 deg e_RAg rms uncertainty on RAg
104-108 F5.1 deg DEg Mean declination of geocentric radiant
110-113 F4.1 deg e_DEg rms uncertainty on DEg
115-118 F4.1 km/s Vg Mean geocentric velocity
120-122 F3.1 km/s e_Vg rms uncertainty on Vg
125-128 F4.1 km/s Vh Mean heliocentric velocity
130-132 F3.1 km/s e_Vh rms uncertainty on Vh
135-138 I4 --- N Number of separated meteors of given shower
141-144 F4.2 --- Dlim Limiting value of the Southworth-Hawkins
D-discriminant at which the shower was
separated
--------------------------------------------------------------------------------
Note (1): we give the given shower separated from that database, in which the
value of limiting D-discriminant was the lowest.
Abbreviations of the used databases as follows:
F = photographic IAU MDC database
C = CAMS video-database
S = SonotaCo video-database
E = EDMOND video-database
--------------------------------------------------------------------------------
Acknowledgements:
Lubos Neslusan, ne(at)ta3.sk
(End) Patricia Vannier [CDS] 02-Nov-2016