2010A&A...510A..39C


Query : 2010A&A...510A..39C

2010A&A...510A..39C - Astronomy and Astrophysics, volume 510, A39-39 (2010/2-1)

First CoRoT light curves of RR Lyrae stars. Complex multiplet structure and non-radial pulsation detections in V1127 Aquilae.

CHADID M., BENKO J.M., SZABO R., PAPARO M., CHAPELLIER E., KOLENBERG K., PORETTI E., BONO G., LE BORGNE J.-F., TRINQUET H., ARTEMENKO S., AUVERGNE M., BAGLIN A., DEBOSSCHER J., GRANKIN K.N., GUGGENBERGER E. and WEISS W.W.

Abstract (from CDS):

The CoRoT - Convection Rotation and planetary Transits - space mission is a great opportunity for monitoring stars with excellent time-sampling and unprecedented photometric precision for up to 150 days. As an important benefit, high-quality RR Lyrae light curves are obtained with a quasi-uninterrupted coverage over several pulsation and Blazhko cycles. The Blazhko effect in RR Lyrae stars is an unsolved problem of astrophysics. We used the high-precision space data to contribute more precise knowledge to explain the possible physical processes behind the phenomenon. We applied different period-finding techniques including Period04, MuFrAn, PDM and SigSpec. Amplitude and phase modulation were investigated by an analytical function method as well as with the traditional O-C diagrams. The Blazhko modulation frequency is directly detected in the spectrum, as well as its first and second harmonics. It shows the non-linear nature of the Blazhko modulation. Besides the triplets, further higher-order modulation side peaks appear around the pulsation frequency as quintuplet, septuplet, nonuplet, undecaplet, tredecaplet, quindecaplet and sepdecaplet structures. Additional frequencies, not belonging to the classical multiplet structures, are detected, as well as their linear combinations with the fundamental radial mode. We interpret these additional terms as non-radial modes. During the five consecutive Blazhko cycles, there is a shift of the maximum phase around 0.011 pulsation phase which is likely the consequence of a long term modulation.

Abstract Copyright:

Journal keyword(s): stars: atmospheres - stars: variables: RR Lyr - techniques: photometric - methods: data analysis - hydrodynamics - space vehicles

VizieR on-line data: <Available at CDS (J/A+A/510/A39): table1.dat>

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 UCAC2 31827126 dS* 06 45 29.2320199488 +00 23 05.004257928   14.9 14.098 13.77   K2V 7 0
2 V* AQ Leo RR* 11 23 55.2752313792 +10 18 59.076153504           kA5hF3.5 77 0
3 V* RV UMa RR* 13 33 18.0838837128 +53 59 14.598026988   10.97 10.9     kA9hF7 166 0
4 V* MW Lyr RR* 18 19 53.8179512304 +31 58 54.622695360           ~ 43 0
5 V* V1127 Aql RR* 19 24 00.1009965936 +01 41 48.516499608   15.997 14.991 15.188   ~ 36 1
6 2MASS J19250542+0139236 El* 19 25 05.429 +01 39 23.64     16.161     ~ 7 0
7 ATO J291.6554+01.2262 RR* 19 26 37.3219673784 +01 13 34.777336800   15.6 15.928 14.8   ~ 19 0
8 2MASS J19281363+0040423 RR* 19 28 13.6272795528 +00 40 42.157220952     15.864     ~ 10 0
9 ATO J292.0600+00.1005 RR* 19 28 14.4100536912 +00 06 02.232536292     15.601     ~ 12 0
10 CoRoT 101503544 V* 19 29 10.1274291024 +00 43 46.917640740   16.092 14.745 14.482   ~ 6 0
11 V* DM Cyg RR* 21 21 11.5417679280 +32 11 28.708593720   11.83 11.63     kF4hF7.5 112 0

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2022.12.06-18:25:45

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