Revisiting CoRoT RR Lyrae stars: detection of period doubling and temporal variation of additional frequencies

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Volume 570 (October 2014)

A&A, 570 (2014) A100

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Table 4

Summary of the main results: period doubling search and additional frequencies that were investigated in detail along with their most probable identification.


CoRoT ID	Ampl. of 1.5f₀	Alternating	Type	PD	f₀ or f₁	Additional freq.	Frequency ratio	Identification

	[mmag]	maxima		yes / no	[d^-1]	f′ [d^-1]	f / f ′


0101370131	< 0.30	n	RRab	n	1.61464
0101315488	< 0.10	n	RRab	n	2.06057
0103800818	< 0.07	n	RRab	n	2.14622
0104315804	< 0.15	n	RRab	n	1.38538
0100689962	3.21	y	RRab Bl	y	2.80902	4.03265	0.697	nr
0101128793	2.44	y	RRab Bl	y	2.11895	3.63088	0.584	O2
0100881648	< 0.10	n	RRab Bl	n ^a	1.64694
0101503544	< 0.05	y	RRab Bl	y ^a	1.65266	2.38929^*	0.692	nr
0105288363	< 0.35	n	RRab Bl	n	1.76230	2.98400	0.591	O2
0103922434	< 0.30	y	RRab Bl	y	1.84712	2.61220^*	0.707	nr
0105036241	< 0.20	n	RRc	n	2.68153	4.37783^*	0.613	f _X
0105735652	< 0.13	n	RRc	n	3.58218	5.82484^*	0.615	f _X
0101368812	< 0.20	n	RRd f₀	n	2.04901	−	−	−
	< 0.15	n	RRd f₁	n	2.75026	4.47862	0.614	f _X

Notes. “<” denotes upper amplitude limit. For the only RRd star in the sample, half-integer frequencies corresponding to both radial pulsation modes were searched for.

^(a)

denotes blended pulsators, a configuration that prevents detection of low-amplitude features. Identifications: O2: second radial overtone; nr: nonradial mode; fx: ubiquitous frequency in RRc stars with a frequency ratio ≈0.61 (Moskalik 2014).

^(*)

New discoveries, other frequencies were reported in previous publications, see Table 1 for the relevant references.

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