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Journal "Peremennye Zvezdy"
Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie,
vol. 10, N 15 (2010)

Multiperiodic Delta Scuti Variables with Nonradial Pulsations

A. V. Khruslov
Tula, Russia

Received:   7.03.2010;   accepted:   6.05.2010
(E-mail for contact: khruslov@bk.ru)

#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 TYC 8590 00384 1, HD 30207909 04 45.95, -56 25 03.5DSCT9.569.70V(see Comments)(see Comments)maxA5Comm. 11.PNG ASAS 090446-5625.1
2 TYC 8948 00036 109 14 55.63, -64 01 33.0DSCT10.7111.01V(see Comments)(see Comments)max Comm. 22.PNG ASAS 091455-6401.6
3 TYC 7697 03154 109 46 23.30, -39 56 56.8DSCT9.689.83V(see Comments)(see Comments)max Comm. 33.PNG ASAS 094623-3957.0
4 TYC 8598 01984 1, HD 29873209 52 19.96, -54 14 29.9DSCT10.2310.41V(see Comments)(see Comments)maxA3Comm. 44.PNG ASAS 095220-5414.5
5 TYC 8211 01725 110 57 19.15, -50 57 52.4DSCT11.0511.27V(see Comments)(see Comments)max Comm. 55.PNG ASAS 105719-5057.9
6 TYC 9020 00319 115 03 06.66, -60 27 57.5DSCT10.1110.32V(see Comments)(see Comments)max Comm. 66.PNG ASAS 150306-6028.0
7 TYC 9027 02560 115 44 58.70, -62 36 55.6DSCT10.8711.08V(see Comments)(see Comments)max Comm. 77.PNG ASAS 154459-6236.9
8 TYC 8727 00855 117 10 21.96, -54 15 04.7DSCT10.2010.40V(see Comments)(see Comments)max Comm. 88.PNG ASAS 171022-5415.1
9 TYC 7416 00561 118 48 06.96, -35 13 42.3DSCT11.1411.36V(see Comments)(see Comments)max Comm. 99.PNG ASAS 184807-3513.7
10 TYC 6875 00773 1, HD 18171919 22 26.27, -22 34 42.5DSCT9.429.61V(see Comments)(see Comments)maxF0IVComm. 1010.PNG ASAS 192226-2234.7
11NSV 12879TYC 1618 00812 1, HD 35508020 11 38.88, +16 06 27.9DSCT8.939.12V(see Comments)(see Comments)maxF0Comm. 1111.PNG ASAS 201139+1606.4

Comments:


1.  ASAS 090446-5625.1
     TYC 8590 00384 1 = HD 302079 = ASAS 090446-5625.1

B-V = 0.452 (Tycho2), J-H = 0.159 (2MASS), Spectral type: A5.
P = 0.17544 d, DSCT/EC/ESD (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 5.69995 0.033 0.1754402 2453400.089
f2 5.87486 0.015 0.1702168 2453400.163
f3 5.57250 0.008 0.1794528 2453400.127
f4 9.21832 0.006 0.1084796 2453400.053



2.  ASAS 091455-6401.6
     TYC 8948 00036 1 = ASAS 091455-6401.6

B-V = 0.455 (Tycho2), J-H = 0.184 (2MASS).
P = 0.154198 d, DSCT (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 6.485320 0.076 0.1541944 2452614.704
f2 6.720177 0.025 0.1488056 2452614.731
f3 6.609512 0.016 0.1512971 2452614.718



3.  ASAS 094623-3957.0
     TYC 7697 03154 1 = ASAS 094623-3957.0

B-V = 0.436 (Tycho2), J-H = 0.135 (2MASS).
P = 0.152365 d, DSCT (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 6.563196 0.039 0.1523648 2453600.117
f2 6.228950 0.020 0.1605407 2453600.089
f3 6.48210 0.017 0.1542710 2453600.120
f4 6.99815 0.009 0.1428950 2453600.018




4.  ASAS 171022-5415.1
     TYC 8598 01984 1 = HD 298732 = ASAS 095220-5414.5

B-V = 0.505 (Tycho2), J-H = 0.152 (2MASS), Spectral type: A3.
P = 0.168942 d, DSCT (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 5.919205 0.046 0.1689416 2453600.078
f2 5.663229 0.022 0.1765777 2453600.121




5.  ASAS 105719-5057.9
     TYC 8211 01725 1 = ASAS 105719-5057.9

B-V = 0.394 (Tycho2), J-H = 0.091 (2MASS).
P = 0.048799 d, DSCT (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 20.49243 0.063 0.0487985 2453500.0095
f2 20.73876 0.017 0.0482189 2453500.0195




6.  ASAS 150306-6028.0
     TYC 9020 00319 1 = ASAS 150306-6028.0

B-V = 0.565 (Tycho2), J-H = 0.201 (2MASS).
P = 0.152295 d, DSCT/DSCTr (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 6.56620 0.059 0.1522950 2453500.077
f2 7.93107 0.019 0.1260864 2453500.038
f1+f2 14.49727 0.009 0.0689785 2453500.044

The P2/P1 ratio (0.8279) is close to that typical of the first and second overtone modes (P2/P1 = 0.80).



7.  ASAS 154459-6236.9
     TYC 9027 02560 1 = ASAS 154459-6236.9

B-V = 0.309 (Tycho2), J-H = 0.126 (2MASS).
P = 0.130132 d, DSCT/EC/ESD (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 7.68451 0.042 0.1301318 2453600.039
f2 8.16955 0.034 0.1224057 2453600.091




8.  ASAS 171022-5415.1
     TYC 8727 00855 1 = ASAS 171022-5415.1

B-V = 0.412 (Tycho2), J-H = 0.203 (2MASS).
P = 0.109126 d, DSCT (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 9.16355 0.042 0.1091280 2453500.021
f2 9.36903 0.034 0.1067346 2453500.064
f3 9.15744 0.010 0.1092008 2453500.001
f4 9.15132 0.006 0.1092738 2453500.036
f5 15.40360 0.006 0.0649199 2453500.011




9.  ASAS 184807-3513.7
     TYC 7416 00561 1 = ASAS 184807-3513.7

B-V = 0.480 (Tycho2), J-H = 0.135 (2MASS).
P = 0.13714 d, DSCT (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 7.29154 0.054 0.1371452 2452796.713
f2 7.43161 0.023 0.1345604 2452796.701

The period P3=0.0821122 d (f3=12.17846 c/d) with an amplitude of 0.008 mag is not excluded.



10.  ASAS 192226-2234.7
     TYC 6875 00773 1 = HD 181719 = BD-22 5076 =
= ASAS 192226-2234.7

B-V = 0.409 (Tycho2), J-H = 0.087 (2MASS), Spectral type: F0IV.
P = 0.17751 d, DSCT/BCEP (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 5.63359 0.049 0.1775066 2453600.151
f2 5.28671 0.018 0.1891534 2453600.183
f3 4.83146 0.016 0.2069768 2453600.156
f4 5.43772 0.008 0.1839006 2453600.171
f5 5.18874 0.008 0.192725 2453600.028




11.  ASAS 201139+1606.4
     TYC 1618 00812 1 = HD 355080 = NSV 12879 =
=ASAS 201139+1606.4

B-V = 0.349 (Tycho2), J-H = 0.177 (2MASS), Spectral type: F0.
P = 0.089251 d, DSCT (Pojmanski 2002).
Frequency, c/d Semi-amplitude, V mag Period, days Epoch, HJD
f1 10.20135 0.048 0.0980262 2453900.007
f2 9.95522 0.036 0.1004498 2453900.080


Remarks:
I present an investigation of 11 known DSCT variables with small amplitudes. The variability of these stars was reported by Pojmanski (2002).

I re-analysed the ASAS-3 data using the period-search software developed by Dr. V.P. Goranskij for Windows environment. According to ASAS-3 data, the variables are multiperiodic Delta Scuti stars. Most harmonics have low amplitudes and are probably nonradial.

References:
Pojmanski, G., 2002, Acta Astronomica, 52, 397


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