J/ApJS/241/31 Kink oscillations of solar coronal loops (Nechaeva+, 2019)
Catalog of decaying kink oscillations of coronal loops in the 24th solar cycle.
Nechaeva A., Zimovets I.V., Nakariakov V.M., Goddard C.R.
<Astrophys. J. Suppl. Ser., 241, 31 (2019)>
=2019ApJS..241...31N 2019ApJS..241...31N
ADC_Keywords: Sun; Ultraviolet
Keywords: Sun: activity ; Sun: corona ; Sun: oscillations
Abstract:
A catalog of kink oscillations of solar coronal loops, which spans
during almost all of solar cycle 24, is presented. The catalog is
based on the observations made in the extreme ultraviolet band at
171Å with Solar Dynamics Observatory/Atmospheric Imaging Assembly
and includes parameters of 223 oscillating loops in 96 oscillation
events. The catalog provides the information about the oscillation
locations, time, and dates of the events, associated flare, initial
displacement, oscillation period, exponential damping time, and
apparent amplitude. The vast majority of the oscillation detections,
84%, were made in the loops situated near or off the solar limb. The
oscillation periods are found to range from 1 to 28 minutes, with 74%
of the events that have the period in the range of 2-10 minutes. About
90% of the oscillations have the apparent amplitude in the range of
1-10Mm. The oscillating loop lengths are 70-600 Mm. The typical
apparent amplitude is about 1% of the loop length. The oscillation
period scales linearly with the loop length, and the damping time
scales linearly with the period, which confirm previous findings. The
oscillation quality factor scales with the amplitude to the power of
minus 0.7. No statistically significant evidence of correlation was
found between both the oscillation period and the mean sunspot number,
and the loop length and mean sunspot number. The catalog provides the
research community with the foundation for the further statistical
study of kink oscillations and their use for coronal seismology.
Description:
In the previous work (Goddard+ 2016A&A...585A.137G 2016A&A...585A.137G), 48 kink
oscillation events, including 120 individual loop oscillations, were
analyzed with the use of Solar Dynamics Observatory/Atmospheric
Imaging Assembly (SDO/AIA) data in 171Å, obtained from 2010 May 20
(when SDO/AIA data became available) to 2014 May 20.
In this work, we significantly extend the catalog by adding the data
that span from 2014 May 20 to 2018 December 26.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 118 223 Parameters of 223 decaying kink oscillations of
coronal loops detected with SDO/AIA at 171Å
in 2010-2018
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See also:
J/A+A/304/563 : Cool X-ray flares of Sun with GOES (Phillips+, 1995)
J/ApJ/757/94 : Solar flares observed with GOES and AIA (Aschwanden, 2012)
J/A+A/574/A37 : Movies of 2012-10-16 solar flare (Dalmasse+, 2015)
J/ApJ/831/105 : Global energetics of solar flares. IV. CME (Aschwanden, 2016)
J/ApJ/833/284 : Quasi-periodic pulsations in solar flares (Inglis+, 2016)
J/ApJ/845/36 : Complex network for solar active regions (Daei+, 2017)
J/ApJ/847/115 : The solar flare complex network (Gheibi+, 2017)
http://www.lmsal.com/hek/index.html : Heliophysics events knowledgebase
http://www.jhelioviewer.org/ : JHelioviewer home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 1 I1 --- Subset [1/2] Subset (1)
3- 4 I2 --- Event [1/96] Event number
6- 7 I2 --- Loop [1/11] Loop number in the Event
9- 10 A2 --- LC Loop Class (2)
12- 16 I5 arcsec X1 [-1220/1184] Slit position, X1
18- 22 I5 arcsec X2 [-1205/1230] Slit position, X2
24- 27 I4 arcsec Y1 [-673/744] Slit position, Y1
29- 32 I4 arcsec Y2 [-645/8615] Slit position, Y2
34- 44 A11 "Y/M/D" Obs.date Event starting date (UT)
46- 53 A8 "h:m:s" Obs.time Event starting time
55- 74 A20 --- Flare GOES Flare identifier
76- 80 F5.2 min Per [1.6/28.2] Oscillation period
82- 85 F4.2 min e_Per [0.02/3.4] Uncertainty in Per
87- 89 I3 Mm Len [78/789]? Loop length, 10+6m
91- 92 I2 Mm e_Len [8/36]? Uncertainty in Len
94- 97 F4.1 Mm Dis [0.3/46.5] Initial Displacement, 10+6m
99-102 F4.1 Mm Amp [0.5/27.6] Oscillation amplitude, 10+6m
104-106 F3.1 Mm e_Amp [0.2/7.1]? Uncertainty in Amp
108-112 F5.2 min Dtime [2.6/49.3]? Damping time
114-118 F5.2 min e_Dtime [0.4/20.6]? Uncertainty in Dtime
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Note (1): Subset=1 of the catalog is taken from
Goddard & Nakariakov (2016A&A...590L...5G 2016A&A...590L...5G).
Note (2): The loop class is described by a letter and number, which specify
the type (S,B,C) and data quality (1,2,3). The type and quality values
are --
S = Segment, where we can clearly see a part of loop not interfering
with other loops;
B = Bundle, where there are several parallel loops;
C = Crossing, where there are several other loops crossing the analysed loop.
1 = A clearly observed oscillation of a loop or bundle with a clearly defined
edge and/or center, the data is considered promising for future study
such as seismological applications;
2 = lower quality data, where part of the oscillation or structure is obscured
and/or the data is noisy, but may still provide useful information for
future study;
3 = low quality data, where any measurement beyond a period estimate is
very subjective.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 22-Nov-2019