1998A&A...333L..35A

Query : 1998A&A...333L..35A

1998A&A...333L..35A - Astronomy and Astrophysics, volume 333, L35-38 (1998/5-2)

The possible effects of an unusual resonance in very long period Cepheids.

ANTONELLO E.

Abstract (from CDS):

The shape of the radial velocity and light curves of 24 long-period (30≤P≤134d) Cepheids in the Magellanic Clouds shows a progression with the period. The sequences of the radial velocity and light curves are based only on a small sample of stars; however, evident changes of the shape can be seen in Cepheids with period between 90 and 134d. The Fourier parameter-period diagrams for the radial velocity curves show trends which remind in part those of Cepheids with period near 10d. The plausible interpretation is a resonance, probably P₀/P₁=2 between the fundamental and the first overtone mode. The possible importance of this phenomenon for the study of stellar structure and evolution in relatively far galaxies is emphasized .

Abstract Copyright: ∼

Journal keyword(s): stars: oscillations - Cepheids - Magellanic Clouds

VizieR on-line data: <Available at CDS (J/A+A/333/L35): table1.dat table2.dat table3.dat tables.ps tables.tex>

Simbad objects: 29

View the references in ADS

Number of rows : 29

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2022	#notes
1	V* BZ Tuc	s*y	00 41 43.4481452424	-73 43 23.884459392		13.290	12.160	11.613	10.911	G0Iab	68	0
2	OGLE SMC-CEP-921	s*y	00 46 53.1109589208	-72 42 51.733779624		12.67	12.04		11.421	G0Iab	59	0
3	SV* HV 829	cC*	00 50 28.7968305768	-72 45 09.210864996	12.97	12.26	11.63		11.017	G0Ib	78	0
4	SV* HV 11157	cC*	00 52 56.8080848496	-71 55 03.243982764		13.75	12.916		11.853	~	43	0
5	SV* HV 834	cC*	00 53 42.6456610344	-72 17 13.632027000		12.48	11.89		11.268	F2Ib	62	0
6	NGC 300	GiG	00 54 53.4465638304	-37 41 03.168402396	8.83	8.69	8.13	7.46		~	1402	2
7	SV* HV 837	cC*	00 55 56.0568870768	-71 59 02.691309588		14.16	13.233		12.297	~	61	0
8	SV* HV 11182	cC*	00 57 33.9037888008	-72 04 12.821483568		14.59	13.721		12.663	~	35	0
9	IC 1613	GiC	01 04 54.2	+02 08 00		10.42	10.01	9.77		~	1167	2
10	SV* HV 2195	cC*	01 14 28.0646245968	-72 39 53.532235548		14.02	13.115		12.144	F5Ib	45	0
11	NGC 925	H2G	02 27 16.913	+33 34 43.97		10.69	10.12	9.55		~	731	1
12	SV* HV 5497	cC*	04 55 40.5527820192	-66 25 43.318661664		13.366	11.930	11.38	10.88	G2Ib	74	0
13	NSV 1789	cC*	04 56 26.7915982608	-64 41 40.258787892		12.93	12.02			~	40	0
14	SV* HV 877	cC*	04 57 01.7944309968	-67 59 42.589297284		14.10	13.363		12.232	~	50	0
15	SV* HV 879	cC*	04 58 05.5960382376	-69 27 15.480133020		14.72	13.457	13.01	12.299	~	56	0
16	HD 268878	cC*	04 58 10.7956592640	-69 56 58.781211396		13.83	13.134	12.96	12.005	K5	71	0
17	SV* HV 883	cC*	05 00 07.5644790720	-68 27 00.064228464	14.033	13.86	11.63	11.35	10.91	F8/G0Ia	74	0
18	SV* HV 2338	cC*	05 06 08.8555282080	-71 15 26.118906300		12.83	12.26		11.858	~	60	0
19	SV* HV 2294	cC*	05 06 14.8080123792	-66 40 45.907786884		12.66	12.15	12.44	11.830	F7I	80	0
20	HD 269075	cC*	05 06 47.9715275784	-70 02 13.295472684		13.30	12.944	12.77	11.861	M	65	0
21	SV* HV 899	cC*	05 07 07.8256721256	-68 53 19.448617524		13.50	13.471	12.83	12.403	~	53	0
22	SV* HV 904	cC*	05 08 18.2386417176	-68 46 47.058274920		14.42	13.564	13.45	12.452	~	34	0
23	SV* HV 909	cC*	05 09 20.1372980832	-70 27 27.043469748		13.32	12.67	12.11	11.949	~	62	0
24	SV* HV 2369	cC*	05 13 53.6706712704	-67 03 48.446510436	14.7	12.88	12.21		11.648	F5?I?	64	0
25	SV* HV 2447	cC*	05 19 30.5048741424	-68 41 09.722625720		13.37	10.52	9.44	10.870	G1Ia?	58	0
26	SV* HV 1002	cC*	05 35 49.4252268792	-66 42 01.692147564		12.72	12.36		12.160	~	43	0
27	SV* HV 2827	cC*	05 43 47.3076015504	-66 35 08.943397872		13.37	12.02		11.220	M	57	0
28	IC 4182	BiC	13 05 48.7478324064	+37 36 12.965157684		11.86		11.40		~	327	1
29	NGC 6822	G	19 44 56.199	-14 47 51.29		18	8.1			~	1496	0

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