J/MNRAS/491/4345 Pulsation and rotation in NGC 6811 (Rodriguez+, 2020)
Pulsation and rotation in NGC 6811: the Kepler short-cadence stars.
Rodriguez E., Balona L.A., Lopez-Gonzalez M.J., Ocando S., Martin-Ruiz S.,
Rodriguez-Lopez C.
<Mon. Not. R. Astron. Soc., 491, 4345-4364 (2020)>
=2020MNRAS.491.4345R 2020MNRAS.491.4345R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Proper motions ; Parallaxes, trigonometric ;
Optical
Keywords: binaries: general - stars: oscillations - stars: rotation -
stars: variables: δ Scuti
Abstract:
We have analysed a selected sample of 36 Kepler short-cadence stars in
the field of NGC 6811. The results reveal that all the targets are
variable: two red giant stars with solar-like oscillations, 21
main-sequence pulsators (16 δ Scuti and five γ Doradus
stars), and 13 rotating variables. Three new γ Doradus (γ Dor)
variables (one is a hot γ Dor star) are detected in this
work together with five new rotating variables. An in-depth frequency
analysis of the δ Scuti (δ Sct) and γ Dor stars in
the sample shows that the frequency spectra are very rich, in
particular for the δ Sct-type variables. They present very dense
frequency distributions and wide diversity in frequency patterns, even
for stars being members of the cluster and with very similar location
in the Hertzsprung-Russell (H-R) diagram. Rotational modulation is
found for a high percentage of these main-sequence pulsating stars,
which is an indication of stellar activity being common on the
surfaces of these hot stars. In some cases, activity dominates the
luminosity variations. Significant amplitude variability is also
detected in at least some of the pulsation modes of highest amplitude
in almost all the δ Sct stars. One of the δ Sct pulsators
is a member of a binary system with the pulsating component tidally
distorted. This system also shows strong stellar activity, including
several flares that probably originate in the δ Sct component.
Description:
There are 32 stars observed in Kepler short-cadence (SC) mode in the
field of NGC 6811 within a radius d<7.0arcmin from the cluster centre.
This corresponds to primary field A of ground-based observations in
Ocando et al. (in preparation). Four additional objects with available
SC data located in the secondary adjacent field B were also included,
bringing the total number of stars studied to 36.
Table 1 lists information for these stars including parameters derived
from the literature. The majority of the targets are confirmed members
of NGC 6811. Four stars in our sample do not have Gaia measurements:
ID15, ID16, ID23, and ID35. ID23 is a probably member of the cluster
(Sanders 1971A&A....15..368S 1971A&A....15..368S; Pena et al. 2011RMxAA..47..309P 2011RMxAA..47..309P, Cat.
J/other/RMxAA/47.309), but there is no reliable information in the
literature for the others.
Table A1 lists the proper motions and parallaxes from Gaia DR2 (Gaia
Collaboration, 2018A&A...616A...1G 2018A&A...616A...1G, Cat. I/345) for our sample of
stars. Tables B1-B3 list the results of the Fourier fits for the 20
main significant peaks, when possible, for each of the main-sequence
pulsators in our sample.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 92 36 Kepler stars observed in SC mode within a
distance d<7.0arcmin from the centre of NGC 6811
tablea1.dat 73 36 Data for the sample of stars
tableb1.dat 414 10 Fourier fit for the 20 main significant peaks,
when possible, for the δ Sct- and
γ Dor-type stars of Group I
tableb2.dat 421 7 Fourier fit for the 20 main significant peaks
for the δ Sct stars of Group II
tableb3.dat 418 4 Fourier fit for the 20 main significant peaks
for the δ Sct stars of Group III
--------------------------------------------------------------------------------
See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- ID [1/36] Internal object identifier
4- 10 I7 --- KIC KIC object identifier
12- 14 I3 --- WEB WEBDA identification number
16- 20 F5.2 mag Kpmag Kepler magnitude
22- 25 F4.1 arcmin Dist Distance from the cluster centre
27 A1 --- f_Dist [B] Flag on Dist (1)
29- 30 I2 --- Nm Number of months with Kepler SC observations
32- 44 A13 --- VarType Variability type (2)
46- 50 A5 --- r_VarType Reference for VarType (3)
52- 56 F5.3 [K] logTeff Logarithm of the effective temperature
58- 63 F6.3 [Lsun] logL Logarithm of star luminosity
65 A1 --- Mem [NM ] Cluster membership (M:member,
N:non-member)
67- 85 A19 --- TypeTW Variability type derived in this work
87 A1 --- f_TypeTW [a] Flag on TypeTW (4)
89- 92 A4 --- Ampvar Amplitude variability detected in this work
for the main pulsation modes
--------------------------------------------------------------------------------
Note (1): Flag as follows:
B = Additional star from a secondary field (4/36)
Note (2): Vx (Luo et al. 2009NewA...14..584L 2009NewA...14..584L identification), S-L (solar-like
oscillations), Rot (rotational variable), EB (eclipsing binary),
Bin (binary), SB1 (single-line spectroscopic binary), F (flares).
Note (3): Reference as follows:
1 = Luo et al. (2009NewA...14..584L 2009NewA...14..584L)
2 = Uytterhoeven et al. (2011A&A...534A.125U 2011A&A...534A.125U, Cat. J/A+A/534/A125)
3 = Molenda-Zakowicz et al. (2014MNRAS.445.2446M 2014MNRAS.445.2446M)
4 = Prsa et al. (2011AJ....141...83P 2011AJ....141...83P, Cat. J/AJ/141/83)
5 = Balona (2013MNRAS.431.2240B 2013MNRAS.431.2240B, Cat. J/MNRAS/431/2240)
6 = Balona (2014MNRAS.443.1946B 2014MNRAS.443.1946B)
7 = Balona (2015MNRAS.447.2714B 2015MNRAS.447.2714B, Cat. J/MNRAS/447/2714)
8 = McQuillan et al. (2014ApJS..211...24M 2014ApJS..211...24M, Cat. J/ApJS/211/24)
9 = Nielsen et al. (2013A&A...557L..10N 2013A&A...557L..10N, Cat. J/A+A/557/L10)
10 = Reinhold et al. (2013A&A...560A...4R 2013A&A...560A...4R, Cat. J/A+A/560/A4)
11 = Reinhold et al. (2015A&A...583A..65R 2015A&A...583A..65R, Cat. J/A+A/583/A65)
12 = Meibom et al. (2011ApJ...733..115M 2011ApJ...733..115M, Cat. J/ApJ/733/115)
13 = Stello et al. (2011ApJ...739...13S 2011ApJ...739...13S)
14 = Debosscher et al. (2011A&A...529A..89D 2011A&A...529A..89D, Cat. J/A+A/529/A89)
15 = Sandquist et al. (2016ApJ...831...11S 2016ApJ...831...11S, Cat. J/ApJ/831/11)
Note (4): Flag as follows:
a = νrot has significance >50, but it is not among the 20 main
significant peaks
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- ID [1/36] Internal object identifier
4- 10 I7 --- KIC KIC object identifier
12- 17 F6.3 mas/yr pmRA ? Proper motion in right ascension (1)
19- 23 F5.3 mas/yr e_pmRA ? Error on pmRA (1)
25- 30 F6.3 mas/yr pmDE ? Proper motion in declination (1)
32- 36 F5.3 mas/yr e_pmDE ? Error on pmDE (1)
38- 43 F6.4 mas plx ? Parallax (1)
45- 50 F6.4 mas e_plx ? Error on plx (1)
52- 57 F6.3 mag Vmag V-magnitude from Simbad
59- 65 F7.4 [Lsun] logL Logarithm of star luminosity (2)
67- 71 F5.3 [Lsun] e_logL Error on logL
73 A1 --- Mem [MN ] Cluster membership (M:member,
N:non-member)
--------------------------------------------------------------------------------
Note (1): Values from Gaia DR2 (Gaia Collaboration 2018A&A...616A...1G 2018A&A...616A...1G,
Cat. I/345)
Note (2): Luminosities are from Gaia parallaxes assuming AV=0.15mag
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableb1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- ID [3/35] Internal object identifier
4- 7 A4 --- Quarter Monthly quarter from the short-cadence time
serie
9- 15 F7.4 d-1 F1 Frequence of the 1st main significant peak
17- 21 F5.3 mmag Amp1 Amplitude corresponding to F1
23- 27 F5.1 --- S/N1 Signal to noise corresponding to F1
29- 35 F7.4 d-1 F2 Frequence of the 2nd main significant peak
37- 41 F5.3 mmag Amp2 Amplitude corresponding to F2
43- 47 F5.1 --- S/N2 Signal to noise corresponding to F2
49- 55 F7.4 d-1 F3 Frequence of the 3rd main significant peak
57- 61 F5.3 mmag Amp3 Amplitude corresponding to F3
63- 66 F4.1 --- S/N3 Signal to noise corresponding to F3
68- 74 F7.4 d-1 F4 Frequence of the 4th main significant peak
76- 80 F5.3 mmag Amp4 Amplitude corresponding to F4
82- 85 F4.1 --- S/N4 Signal to noise corresponding to F4
87- 93 F7.4 d-1 F5 ? Frequence of the 5th main significant peak
95- 99 F5.3 mmag Amp5 ? Amplitude corresponding to F5
101-104 F4.1 --- S/N5 ? Signal to noise corresponding to F5
106-112 F7.4 d-1 F6 ? Frequence of the 6th main significant peak
114-118 F5.3 mmag Amp6 ? Amplitude corresponding to F6
120-124 F5.1 --- S/N6 ? Signal to noise corresponding to F6
126-132 F7.4 d-1 F7 ? Frequence of the 7th main significant peak
134-138 F5.3 mmag Amp7 ? Amplitude corresponding to F7
140-143 F4.1 --- S/N7 ? Signal to noise corresponding to F7
145-151 F7.4 d-1 F8 ? Frequence of the 8th main significant peak
153-157 F5.3 mmag Amp8 ? Amplitude corresponding to F8
159-162 F4.1 --- S/N8 ? Signal to noise corresponding to F8
164-169 F6.4 d-1 F9 ? Frequence of the 9th main significant peak
171-175 F5.3 mmag Amp9 ? Amplitude corresponding to F9
177-180 F4.1 --- S/N9 ? Signal to noise corresponding to F9
182-188 F7.4 d-1 F10 ? Frequence of the 10th main significant peak
190-194 F5.3 mmag Amp10 ? Amplitude corresponding to F10
196-199 F4.1 --- S/N10 ? Signal to noise corresponding to F10
201-207 F7.4 d-1 F11 ? Frequence of the 11th main significant peak
209-213 F5.3 mmag Amp11 ? Amplitude corresponding to F11
215-218 F4.1 --- S/N11 ? Signal to noise corresponding to F11
220-226 F7.4 d-1 F12 ? Frequence of the 12th main significant peak
228-232 F5.3 mmag Amp12 ? Amplitude corresponding to F12
234-237 F4.1 --- S/N12 ? Signal to noise corresponding to F12
239-245 F7.4 d-1 F13 ? Frequence of the 13th main significant peak
247-251 F5.3 mmag Amp13 ? Amplitude corresponding to F13
253-256 F4.1 --- S/N13 ? Signal to noise corresponding to F13
258-264 F7.4 d-1 F14 ? Frequence of the 14th main significant peak
266-270 F5.3 mmag Amp14 ? Amplitude corresponding to F14
272-275 F4.1 --- S/N14 ? Signal to noise corresponding to F14
277-283 F7.4 d-1 F15 ? Frequence of the 15th main significant peak
285-289 F5.3 mmag Amp15 ? Amplitude corresponding to F15
291-294 F4.1 --- S/N15 ? Signal to noise corresponding to F15
296-302 F7.4 d-1 F16 ? Frequence of the 16th main significant peak
304-308 F5.3 mmag Amp16 ? Amplitude corresponding to F16
310-313 F4.1 --- S/N16 ? Signal to noise corresponding to F16
315-321 F7.4 d-1 F17 ? Frequence of the 17th main significant peak
323-327 F5.3 mmag Amp17 ? Amplitude corresponding to F17
329-332 F4.1 --- S/N17 ? Signal to noise corresponding to F17
334-340 F7.4 d-1 F18 ? Frequence of the 18th main significant peak
342-346 F5.3 mmag Amp18 ? Amplitude corresponding to F18
348-351 F4.1 --- S/N18 ? Signal to noise corresponding to F18
353-359 F7.4 d-1 F19 ? Frequence of the 19th main significant peak
361-365 F5.3 mmag Amp19 ? Amplitude corresponding to F19
367-370 F4.1 --- S/N19 ? Signal to noise corresponding to F19
372-378 F7.4 d-1 F20 ? Frequence of the 20th main significant peak
380-384 F5.3 mmag Amp20 ? Amplitude corresponding to F20
386-389 F4.1 --- S/N20 ? Signal to noise corresponding to F20
391-414 A24 --- Residual Residuals (in mmag) σn after removing
the n first peaks
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableb2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- ID [11/33] Internal object identifier
4- 7 A4 --- Quarter Monthly quarter from the short-cadence time
serie
9- 15 F7.4 d-1 F1 Frequence of the 1st main significant peak
17- 21 F5.3 mmag Amp1 Amplitude corresponding to F1
23- 27 F5.1 --- S/N1 Signal to noise corresponding to F1
29- 35 F7.4 d-1 F2 Frequence of the 2nd main significant peak
37- 41 F5.3 mmag Amp2 Amplitude corresponding to F2
43- 47 F5.1 --- S/N2 Signal to noise corresponding to F2
49- 55 F7.4 d-1 F3 Frequence of the 3rd main significant peak
57- 61 F5.3 mmag Amp3 Amplitude corresponding to F3
63- 67 F5.1 --- S/N3 Signal to noise corresponding to F3
69- 75 F7.4 d-1 F4 Frequence of the 4th main significant peak
77- 81 F5.3 mmag Amp4 Amplitude corresponding to F4
83- 87 F5.1 --- S/N4 Signal to noise corresponding to F4
89- 95 F7.4 d-1 F5 Frequence of the 5th main significant peak
97-101 F5.3 mmag Amp5 Amplitude corresponding to F5
103-107 F5.1 --- S/N5 Signal to noise corresponding to F5
109-115 F7.4 d-1 F6 Frequence of the 6th main significant peak
117-121 F5.3 mmag Amp6 Amplitude corresponding to F6
123-127 F5.1 --- S/N6 Signal to noise corresponding to F6
129-135 F7.4 d-1 F7 Frequence of the 7th main significant peak
137-141 F5.3 mmag Amp7 Amplitude corresponding to F7
143-147 F5.1 --- S/N7 Signal to noise corresponding to F7
149-155 F7.4 d-1 F8 Frequence of the 8th main significant peak
157-161 F5.3 mmag Amp8 Amplitude corresponding to F8
163-167 F5.1 --- S/N8 Signal to noise corresponding to F8
169-175 F7.4 d-1 F9 Frequence of the 9th main significant peak
177-181 F5.3 mmag Amp9 Amplitude corresponding to F9
183-186 F4.1 --- S/N9 Signal to noise corresponding to F9
188-194 F7.4 d-1 F10 Frequence of the 10th main significant peak
196-200 F5.3 mmag Amp10 Amplitude corresponding to F10
202-206 F5.1 --- S/N10 Signal to noise corresponding to F10
208-214 F7.4 d-1 F11 Frequence of the 11th main significant peak
216-220 F5.3 mmag Amp11 Amplitude corresponding to F11
222-225 F4.1 --- S/N11 Signal to noise corresponding to F11
227-233 F7.4 d-1 F12 Frequence of the 12th main significant peak
235-239 F5.3 mmag Amp12 Amplitude corresponding to F12
241-244 F4.1 --- S/N12 Signal to noise corresponding to F12
246-252 F7.4 d-1 F13 Frequence of the 13th main significant peak
254-258 F5.3 mmag Amp13 Amplitude corresponding to F13
260-263 F4.1 --- S/N13 Signal to noise corresponding to F13
265-271 F7.4 d-1 F14 Frequence of the 14th main significant peak
273-277 F5.3 mmag Amp14 Amplitude corresponding to F14
279-282 F4.1 --- S/N14 Signal to noise corresponding to F14
284-290 F7.4 d-1 F15 Frequence of the 15th main significant peak
292-296 F5.3 mmag Amp15 Amplitude corresponding to F15
298-301 F4.1 --- S/N15 Signal to noise corresponding to F15
303-309 F7.4 d-1 F16 Frequence of the 16th main significant peak
311-315 F5.3 mmag Amp16 Amplitude corresponding to F16
317-320 F4.1 --- S/N16 Signal to noise corresponding to F16
322-328 F7.4 d-1 F17 Frequence of the 17th main significant peak
330-334 F5.3 mmag Amp17 Amplitude corresponding to F17
336-339 F4.1 --- S/N17 Signal to noise corresponding to F17
341-347 F7.4 d-1 F18 Frequence of the 18th main significant peak
349-353 F5.3 mmag Amp18 Amplitude corresponding to F18
355-358 F4.1 --- S/N18 Signal to noise corresponding to F18
360-366 F7.4 d-1 F19 Frequence of the 19th main significant peak
368-372 F5.3 mmag Amp19 Amplitude corresponding to F19
374-377 F4.1 --- S/N19 Signal to noise corresponding to F19
379-385 F7.4 d-1 F20 Frequence of the 20th main significant peak
387-391 F5.3 mmag Amp20 Amplitude corresponding to F20
393-396 F4.1 --- S/N20 Signal to noise corresponding to F20
398-421 A24 --- Residual Residuals (in mmag) σn after removing
the n first peaks
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableb3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- ID [2/36] Internal object identifier
4- 7 A4 --- Quarter Monthly quarter from the short-cadence time
serie
9- 15 F7.4 d-1 F1 Frequence of the 1st main significant peak
17- 22 F6.3 mmag Amp1 Amplitude corresponding to F1
24- 28 F5.1 --- S/N1 Signal to noise corresponding to F1
30- 36 F7.4 d-1 F2 Frequence of the 2nd main significant peak (1)
38- 42 F5.3 mmag Amp2 Amplitude corresponding to F2
44- 48 F5.1 --- S/N2 Signal to noise corresponding to F2
50- 56 F7.4 d-1 F3 Frequence of the 3rd main significant peak
58- 62 F5.3 mmag Amp3 Amplitude corresponding to F3
64- 68 F5.1 --- S/N3 Signal to noise corresponding to F3
70- 76 F7.4 d-1 F4 Frequence of the 4th main significant peak
78- 82 F5.3 mmag Amp4 Amplitude corresponding to F4
84- 88 F5.1 --- S/N4 Signal to noise corresponding to F4
90- 96 F7.4 d-1 F5 Frequence of the 5th main significant peak (2)
98-102 F5.3 mmag Amp5 Amplitude corresponding to F5
104-108 F5.1 --- S/N5 Signal to noise corresponding to F5
110-116 F7.4 d-1 F6 Frequence of the 6th main significant peak (3)
118-122 F5.3 mmag Amp6 Amplitude corresponding to F6
124-127 F4.1 --- S/N6 Signal to noise corresponding to F6
129-135 F7.4 d-1 F7 Frequence of the 7th main significant peak
137-141 F5.3 mmag Amp7 Amplitude corresponding to F7
143-146 F4.1 --- S/N7 Signal to noise corresponding to F7
148-154 F7.4 d-1 F8 Frequence of the 8th main significant peak (4)
156-160 F5.3 mmag Amp8 Amplitude corresponding to F8
162-165 F4.1 --- S/N8 Signal to noise corresponding to F8
167-173 F7.4 d-1 F9 Frequence of the 9th main significant peak (5)
175-179 F5.3 mmag Amp9 Amplitude corresponding to F9
181-184 F4.1 --- S/N9 Signal to noise corresponding to F9
186-192 F7.4 d-1 F10 Frequence of the 10th main significant
peak (6)
194-198 F5.3 mmag Amp10 Amplitude corresponding to F10
200-203 F4.1 --- S/N10 Signal to noise corresponding to F10
205-211 F7.4 d-1 F11 Frequence of the 11th main significant
peak (7)
213-217 F5.3 mmag Amp11 Amplitude corresponding to F11
219-222 F4.1 --- S/N11 Signal to noise corresponding to F11
224-230 F7.4 d-1 F12 Frequence of the 12th main significant
peak (8)
232-236 F5.3 mmag Amp12 Amplitude corresponding to F12
238-241 F4.1 --- S/N12 Signal to noise corresponding to F12
243-249 F7.4 d-1 F13 Frequence of the 13th main significant peak
251-255 F5.3 mmag Amp13 Amplitude corresponding to F13
257-260 F4.1 --- S/N13 Signal to noise corresponding to F13
262-268 F7.4 d-1 F14 Frequence of the 14th main significant peak
270-274 F5.3 mmag Amp14 Amplitude corresponding to F14
276-279 F4.1 --- S/N14 Signal to noise corresponding to F14
281-287 F7.4 d-1 F15 Frequence of the 15th main significant peak
289-293 F5.3 mmag Amp15 Amplitude corresponding to F15
295-298 F4.1 --- S/N15 Signal to noise corresponding to F15
300-306 F7.4 d-1 F16 Frequence of the 16th main significant peak
308-312 F5.3 mmag Amp16 Amplitude corresponding to F16
314-317 F4.1 --- S/N16 Signal to noise corresponding to F16
319-325 F7.4 d-1 F17 Frequence of the 17th main significant
peak (9)
327-331 F5.3 mmag Amp17 Amplitude corresponding to F17
333-336 F4.1 --- S/N17 Signal to noise corresponding to F17
338-344 F7.4 d-1 F18 Frequence of the 18th main significant peak
346-350 F5.3 mmag Amp18 Amplitude corresponding to F18
352-355 F4.1 --- S/N18 Signal to noise corresponding to F18
357-363 F7.4 d-1 F19 Frequence of the 19th main significant
peak (10)
365-369 F5.3 mmag Amp19 Amplitude corresponding to F19
371-374 F4.1 --- S/N19 Signal to noise corresponding to F19
376-382 F7.4 d-1 F20 Frequence of the 20th main significant peak
384-388 F5.3 mmag Amp20 Amplitude corresponding to F20
390-393 F4.1 --- S/N20 Signal to noise corresponding to F20
395-418 A24 --- Residual Residuals (in mmag) σn after removing
the n first peaks
--------------------------------------------------------------------------------
Note (1): This frequency corresponds to νorb for star 36
Note (2): This frequency corresponds to F3-νorb for star 36
Note (3): This frequency corresponds to νrot for star 36
Note (4): This frequency corresponds to 2νorb for star 36
Note (5): This frequency corresponds to F7+νorb for star 36
Note (6): This frequency corresponds to F7-νorb for star 36
Note (7): This frequency corresponds to νrot2 for star 36
Note (8): This frequency corresponds to F1-νorb for star 36
Note (9): This frequency corresponds to F1+νorb for star 36
Note (10): This frequency corresponds to F3+νorb for star 36
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 20-Feb-2023