2015MNRAS.452.3334S

Query : 2015MNRAS.452.3334S

2015MNRAS.452.3334S - Mon. Not. R. Astron. Soc., 452, 3334-3345 (2015/October-1)

KIC 4768731: a bright long-period roAp star in the Kepler field.

SMALLEY B., NIEMCZURA E., MURPHY S.J., LEHMANN H., KURTZ D.W., HOLDSWORTH D.L., CUNHA M.S., BALONA L.A., BRIQUET M., BRUNTT H., DE CAT P., LAMPENS P., THYGESEN A.O. and UYTTERHOEVEN K.

Abstract (from CDS):

We report the identification of 61.45/d (711.2 µHz) oscillations, with amplitudes of 62.6 µmag, in KIC 4768731 (HD 225914) using Kepler photometry. This relatively bright (V = 9.17) chemically peculiar star with spectral type A5 Vp SrCr(Eu) has previously been found to exhibit rotational modulation with a period of 5.21d. Fourier analysis reveals a simple dipole pulsator with an amplitude that has remained stable over a 4-yr time span, but with a frequency that is variable. Analysis of high-resolution spectra yields stellar parameters of Teff = 8100±200 K, logg = 4.0±0.2, [Fe/H] = +0.31±0.24 and v sini = 14.8±1.6 km/s. Line profile variations caused by rotation are also evident. Lines of Sr, Cr, Eu, Mg and Si are strongest when the star is brightest, while Y and Ba vary in antiphase with the other elements. The abundances of rare earth elements are only modestly enhanced compared to other roAp stars of similar Teff and logg. Radial velocities in the literature suggest a significant change over the past 30 yr, but the radial velocities presented here show no significant change over a period of 4 yr.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): asteroseismology - techniques: photometric - stars: abundances - stars: chemically peculiar - stars: individual: KIC 4768731 - stars: oscillations

CDS comments: p.3343: KIC 4768631 is a probable misprint for KIC 4768731. J1921 not identified (not enough ionformation).

Simbad objects: 63

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Number of rows : 63
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 1SWASP J000830.50+042818.1 * 00 08 30.5065118400 +04 28 18.185377764   10.42 10.16     A9pSrEu(Cr) 4 0
2 V* AP Scl a2* 01 05 55.6980950160 -26 43 44.007202704   8.60 8.40     A2Vp 121 0
3 V* BW Cet a2* 01 31 16.4742701952 -11 07 07.935608352   9.63 9.38     ApSrEu 43 0
4 HD 12098 a2* 02 00 40.1774521766 +58 31 37.130534305   8.47 8.08 8.758   F0Eu 55 0
5 V* BN Cet a2* 02 06 15.8004336360 -19 07 26.305108608   10.56 10.17     ApSrEuCr 54 0
6 V* BT Hyi a2* 03 00 37.0849651248 -81 54 07.305942240   9.64 9.35     ApSrEuCr 55 0
7 HD 24355 Pe* 03 53 23.0955907416 +25 38 33.364337316   9.97 9.65     A5VSrSiEu 23 0
8 V* DO Eri a2* 03 55 16.1313315312 -12 05 56.727712752 6.35 6.32 6.00     A9VpSrEuCr 411 0
9 V* UV Lep a2* 06 11 21.7521470568 -15 47 35.016189504   7.01 6.75     ApSrCrEu 67 0
10 HD 258048 * 06 29 56.8471020864 +32 24 47.013032304   11.15 10.52     F4EuCr(Sr) 9 0
11 TYC 8912-1407-1 * 06 51 42.1940065872 -63 25 49.547728884   12.26 11.51     ApSrEu(Cr) 12 0
12 V* V409 Car a2* 07 30 56.9886639144 -57 59 28.238685684   9.13 8.89     ApSr(Eu) 132 0
13 HD 69013 * 08 14 28.9689055920 -15 46 31.486504584   10.06 9.56     ApEuSr 29 0
14 HD 75445 PM* 08 48 42.9334141680 -39 14 01.940046864   7.40 7.12     ApSrEu(Cr) 65 0
15 TYC 2488-1241-1 * 08 55 22.2060296784 +32 42 36.288858780   11.3 10.8     A6SrEu 7 0
16 V* LX Hya a2* 09 18 25.0298292960 -20 22 16.256631972   8.08 7.77     A9IIs 75 0
17 HD 83368 a2* 09 36 25.4255061727 -48 45 04.240404102   6.49 6.23     A8VSrCrEu 277 0
18 V* AI Ant a2* 09 41 34.3860562008 -29 22 25.415627484   9.74 9.36     ApSrEuCr 37 0
19 V* V437 Car a2* 09 54 53.4231457944 -58 41 45.371092740   9.70 9.38     ApSr 53 0
20 HD 92499 * 10 40 08.5912210416 -43 04 50.514871224   9.29 8.88     ApSrEuCr 43 0
21 V* TX Crt a2* 11 05 34.0436531568 -25 01 09.250435488   9.88 9.45     ApSrEuCr 43 0
22 HD 97127 Em* 11 10 53.9167670928 +17 03 47.530406160   9.83 9.43     F3SrEu(Cr) 13 0
23 HD 99563 a2* 11 27 16.63609 -08 52 08.1942       9.193   A9III 86 0
24 V* V816 Cen dS* 11 37 37.0409608152 -46 42 34.877876832 8.99 8.79 8.03     F8/G0p 332 0
25 HD 115226 a2* 13 18 00.0189897768 -72 57 00.947433276   8.84 8.50     ApSr(Eu) 40 0
26 HD 116114 PM* 13 21 46.3079033856 -18 44 31.563482928   7.34 7.02     F0VpSrCrEu 145 0
27 V* LZ Hya a2* 13 41 19.8267324192 -28 46 59.793276288   10.41 9.92 9.63 9.659 ApSrEu(Cr) 54 0
28 V* PP Vir a2* 14 04 48.9376773456 +05 24 51.459774732   8.70 8.29     F0 86 0
29 TYC 2553-480-1 Em* 14 30 49.6431091200 +31 47 55.051464408   11.70 11.56     A9SrEu 7 0
30 * alf Cir a2* 14 42 30.4206520931 -64 58 30.478845491 3.55 3.43 3.19 2.96 2.86 A7VpSrCrEu 384 0
31 HD 132205 * 15 00 03.8955061272 -55 03 00.047462040   9.15 8.72     ApEuSrCr 20 0
32 V* HI Lib a2* 15 09 02.4051867312 -13 59 58.675373736   7.84 7.46     F2VpSrCrEu 136 0
33 * bet CrB a2* 15 27 49.7540595700 +29 06 20.494640434 4.08 3.97 3.68 3.50 3.45 F2VpSrCrEuSi 703 0
34 * 33 Lib a2* 15 29 34.7424021408 -17 26 27.377921220 7.22 7.07 6.69     F0VspEuGdSr 260 0
35 HD 143487 SB* 16 01 44.2211390328 -30 54 56.822787720   10.05 9.43     Apec 30 0
36 HD 148593 * 16 29 39.4754679240 -14 35 06.203642568   9.69 9.15     ApSrEuCr 16 0
37 2MASS J16400299-0737293 * 16 40 02.9922289896 -07 37 29.405212248           A7VpSrEu(Cr) 12 0
38 V* V835 Ara a2* 16 44 11.4498857664 -48 39 18.114773796   10.40 9.91     A/F(pEu) 39 0
39 HD 151860 * 16 52 58.6114850064 -54 09 45.729457092   9.41 9.01     ApSrEu(Cr) 22 0
40 HD 154708 a2* 17 10 28.5163457616 -58 00 17.416695708   9.23 8.76     ApSrEu 91 0
41 V* V834 Ara a2* 17 48 29.5532022648 -51 55 02.538979464   10.81 10.39     ApEuSrCr 32 0
42 V* V694 CrA a2* 18 12 25.8347418984 -37 45 09.271268532   8.34 7.92     ApSrCrEu 122 0
43 TYC 3130-2480-1 dS* 18 44 12.2812000704 +43 17 51.906430968   11.85 11.25     A2III 24 0
44 * 10 Aql a2* 18 58 46.9240671288 +13 54 23.941711692 6.23 6.14 5.89     A7VpSrEu_Ksn 292 0
45 TYC 3545-2756-1 a2* 19 05 26.5923938832 +47 15 48.314948904   10.86 10.66 10.56   F0V 35 0
46 BD+44 3063 gD* 19 06 27.5519195736 +44 50 33.430309584   10.60 10.19     A9V 36 0
47 HD 177765 * 19 07 09.7793979672 -26 19 54.506413128   9.60 9.15     ApSrEuCr 40 0
48 HD 180239 Pe* 19 13 41.2519522128 +45 34 50.825887896   10.07 9.83     kA3hA5mF3(IV)Am 23 0
49 BD+44 3113 dS* 19 21 54.9229365504 +44 59 42.077474196   9.86 9.62     F0Vn 21 0
50 V* V4373 Sgr a2* 19 39 20.4197579112 -29 44 34.466055252   10.37 9.96     FpSrEu 37 0
51 UCAC2 13032830 Pu* 19 40 07.8125259936 -44 20 09.320113320   13.35 13.09 13.21 12.72 A7VpEu(Cr) 11 0
52 TYC 3561-1857-1 Pe* 19 46 29.2100561736 +47 37 50.045262924   11.87 11.38 11.45   kA3hA5mA7SiEu 34 0
53 HD 225914 Pe* 19 48 26.7415463208 +39 51 58.045289040   9.353 9.170     A5VpSrCrEu 30 0
54 UCAC3 260-172923 * 19 48 27.7790230296 +39 51 58.662030708       11.31   ~ 1 0
55 V* CK Oct a2* 20 13 56.3652220104 -78 52 42.269446308   10.41 9.94     ApEuSr 51 0
56 V* QR Tel a2* 20 24 11.7818561520 -51 43 25.270017456   9.56 9.18     ApSrCrEu 44 0
57 V* AW Cap a2* 20 38 09.8033063304 -17 30 06.486664068   10.14 9.71     FpSrEu 37 0
58 * gam Equ a2* 21 10 20.5000721160 +10 07 53.691967776 5.03 4.94 4.68 4.43 4.32 A9VpSrCrEu 564 0
59 V* BI Mic a2* 21 26 03.8683509936 -29 55 48.145296468   9.10 8.81     ApSrEu 87 0
60 V* MM Aqr a2* 22 33 12.3248929848 -20 02 21.880485816   10.058 9.582     A(pEuSrCr) 51 0
61 V* BP Gru a2* 23 01 46.8211202616 -44 50 26.878698672   7.99 7.52     ApSrSi: 137 0
62 V* CN Tuc a2* 23 09 27.7123518144 -63 39 12.107929716   9.62 9.38     ApEuSr 48 0
63 HD 218994 ** 23 13 16.03824 -60 35 02.8514           ApSr 40 0

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