1999A&A...349...55A


Query : 1999A&A...349...55A

1999A&A...349...55A - Astronomy and Astrophysics, volume 349, 55-69 (1999/9-1)

Variable stars in nearby galaxies. I. Search for Cepheids in field A of IC 1613.

ANTONELLO E., MANTEGAZZA L., FUGAZZA D., BOSSI M. and COVINO S.

Abstract (from CDS):

The first results are presented of a four-year program dedicated to the CCD observations of Cepheids in the nearby galaxy IC 1613. The goal was to obtain good light curves for Fourier decomposition and to detect shorter period Cepheids. Since the program was carried out with a relatively small telescope, the Dutch 0.9 m at ESO-La Silla, the observations were performed without filter (white light), or Wh-band; the advantage of this technique is that the photon statistics correspond to that of V-band observations made with larger telescopes than 2 m and similar exposure time. The effective wavelength of the Wh-band is intermediate between that of V and R bands for stars of A-G spectral type, for back-illuminated CCD detectors, therefore the photometric characteristics of variable stars (e.g. amplitudes) are generally analogous to those obtained with the standard technique. Field A in IC 1613 has size 3.8'x3.8'. A total of 67 images were obtained and the reduction was performed with DAOPHOT. More than 2900 stars were measured, and for about 1700 stars there are from 67 to 24 Wh data points. Indications on the color of 739 bright stars were obtained also from V and R additional data. The analysis revealed the presence of about 110 variable stars. The detected population I Cepheids are 43; 9 Cepheids were already known from previous works, while most of the new stars have a short period P. We remark the following results: a) for stars with P > 5 d and sufficient phase coverage it is possible to perform good Fourier decomposition with resulting standard deviation of the fit of 0.02-0.04mag; b) there are several Cepheids with relatively small amplitude, and most of them are (probable) first overtone mode pulsators; c) the faintest detected Cepheids have mV∼23. No double-mode Cepheid has been found, probably because the precision and sampling of the data are not sufficient for the detection. Furthermore, at least 5 population II Cepheids and at least 8 eclipsing binaries have been observed. The other variable stars are probable long period, semiregular and irregular variables. A comparison with results of other massive CCD photometric projects dedicated to the detection of variable stars shows some advantages of the observations in white light for fully exploiting the capabilities of relatively small telescopes. A suggestion is made on how to use these results for distance determinations.

Abstract Copyright:

Journal keyword(s): stars: oscillations - stars: variables: Cepheids - stars: variables: general - galaxies: individual: IC 1613 - galaxies: individual: Local Group - galaxies: stellar content

Nomenclature: Tables 4-7: [AMF99] VNNNN N=43+22+8+38 among (Nos 33-3106).

CDS comments: T.3: SV NN = [S71b] VNN.

Simbad objects: 120

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Number of rows : 120
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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11792 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10197 1
3 [AMF99] V0841 Ir* 01 04 50.8 +02 08 33           ~ 1 0
4 [AMF99] V0496 Ir* 01 04 50.8 +02 10 39           ~ 1 0
5 [AMF99] V0764 Ir* 01 04 50.9 +02 08 05           ~ 1 0
6 [AMF99] V0193 Ir* 01 04 50.9 +02 08 54           ~ 1 0
7 [AMF99] V0215 EB* 01 04 50.9 +02 09 10           ~ 1 0
8 [AMF99] V2861 V* 01 04 51.1 +02 08 53           ~ 1 0
9 [AMF99] V0414 Ce* 01 04 51.2 +02 10 04           ~ 2 0
10 [AMF99] V2178 Ir* 01 04 51.6 +02 10 38           ~ 1 0
11 [SHM2017] J016.21524+02.18203 Ce* 01 04 51.6658985808 +02 10 55.414018884   20.97 20.502 20.24 19.96 ~ 10 0
12 [AFF2006] 4175-2 Ce* 01 04 51.70 +02 10 10.2   21.12 20.685 20.35 20.17 ~ 8 0
13 [AMF99] V1758 Ir* 01 04 51.7 +02 10 19           ~ 1 0
14 [AFM2000] V0524-A Ce* 01 04 51.8 +02 10 41           ~ 3 0
15 [AFM2000] V1296-A Ce* 01 04 52.0 +02 10 07           ~ 3 0
16 [AMF99] V0670 V* 01 04 52.0 +02 11 33           ~ 1 0
17 [AMF99] V0253 Ir* 01 04 52.3 +02 09 21           ~ 1 0
18 [AMF99] V1224 Ir* 01 04 52.5 +02 08 50           ~ 1 0
19 [AMF99] V0218 LP* 01 04 52.797 +02 09 09.72           ~ 2 0
20 [AMF99] V1193 V* 01 04 52.8 +02 08 14           ~ 1 0
21 [AMF99] V1961 V* 01 04 53.1 +02 09 27           ~ 1 0
22 [AMF99] V2150 Ce* 01 04 53.1 +02 09 53           ~ 2 0
23 [AMF99] V1908 Ir* 01 04 53.3 +02 08 25           ~ 2 0
24 [AMF99] V0929 Ir* 01 04 53.3 +02 09 20           ~ 1 0
25 [UWP2001] 15356 Ce* 01 04 53.34 +02 10 21.9   22.77 22.107     ~ 5 0
26 [AMF99] V2309 Ce* 01 04 53.4 +02 11 00           ~ 2 0
27 [AMF99] V1322 Ir* 01 04 53.5 +02 10 39           ~ 1 0
28 [AMF99] V1556 V* 01 04 53.6 +02 08 52           ~ 1 0
29 [AMF99] V1167 Ir* 01 04 53.8 +02 11 44           ~ 1 0
30 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1166 2
31 [AMF99] V0975 EB* 01 04 54.3 +02 09 50           ~ 1 0
32 [AMF99] V1767 Ce* 01 04 54.6 +02 10 26           ~ 2 0
33 [AMF99] V0530 Ir* 01 04 54.6 +02 10 47           ~ 1 0
34 [AMF99] V0377 Ce* 01 04 55.0 +02 10 01           ~ 2 0
35 [AMF99] V0699 V* 01 04 55.3 +02 11 39           ~ 1 0
36 [AMF99] V1812 Ir* 01 04 55.4 +02 10 56           ~ 1 0
37 [AMF99] V1830 Ir* 01 04 55.6 +02 11 10           ~ 1 0
38 [AMF99] V1177 Ir* 01 04 55.9 +02 11 53           ~ 1 0
39 [AMF99] V2109 Ir* 01 04 56.0 +02 09 05           ~ 1 0
40 [AMF99] V1849 V* 01 04 56.0 +02 11 28           ~ 1 0
41 [AMF99] V2766 Ce* 01 04 56.1 +02 08 14           ~ 2 0
42 [AMF99] V0655 Ce* 01 04 56.1 +02 11 27           ~ 2 0
43 [AFF2006] 3171-2 Ce* 01 04 56.35 +02 08 21.3   21.60 20.991 20.56 20.37 ~ 9 0
44 [AMF99] V1892 V* 01 04 56.7 +02 08 13           ~ 1 0
45 [AMF99] V1178 Ce* 01 04 56.7 +02 11 54           ~ 2 0
46 [AFM2000] V0178-A Ce* 01 04 56.8 +02 08 58           ~ 3 0
47 [AFM2000] V0107-A Ce* 01 04 57.0 +02 08 37           ~ 3 0
48 [AMF99] V0219 V* 01 04 57.0 +02 09 15           ~ 1 0
49 [AMF99] V1181 Ir* 01 04 57.1 +02 11 58           ~ 1 0
50 [AMF99] V1783 Ir* 01 04 57.6 +02 10 36           ~ 1 0
51 [AMF99] V0688 Ir* 01 04 57.8 +02 11 38           ~ 1 0
52 [AMF99] V2172 Ce* 01 04 57.9 +02 10 36           ~ 2 0
53 [AMF99] V0505 Ir* 01 04 58.0 +02 10 41           ~ 1 0
54 [AMF99] V0130 WV* 01 04 58.2 +02 08 47           ~ 2 0
55 [AMF99] V0157 Ir* 01 04 58.2 +02 08 52           ~ 1 0
56 [S71b] V32 s*r 01 04 58.3863338616 +02 09 08.544805884   19.51 17.42 16.430 15.24 M1Ia 13 0
57 [AMF99] V0787 EB* 01 04 58.47 +02 08 19.0   21.82 21.39 21.12 20.96 ~ 2 0
58 [AMF99] V1935 V* 01 04 58.5 +02 09 03           ~ 2 0
59 [F88b] 1-44 V* 01 04 58.8 +02 08 55     22.38 21.46 21.13 ~ 2 0
60 [AFM2000] V0236-A Ce* 01 04 58.9 +02 09 23   23.32 22.16 21.39 20.73 ~ 4 0
61 [AMF99] V1331 Ir* 01 04 59.0 +02 10 50           ~ 1 0
62 [AMF99] V0971 V* 01 04 59.3 +02 09 55           ~ 2 0
63 [AMF99] V2095 Ir* 01 04 59.4 +02 08 50           ~ 1 0
64 [AMF99] V1978 V* 01 04 59.7 +02 09 54           ~ 1 0
65 [AFM2000] V1289-A Ce* 01 04 59.7 +02 10 05   21.92 21.76     ~ 4 0
66 [AFF2006] 3384-2 Ce* 01 04 59.84 +02 08 42.8   21.62 20.90 20.48 20.19 ~ 8 0
67 [AFF2006] 6157-2 Ce* 01 04 59.96 +02 08 24.7   21.28 21.046 20.72 20.45 ~ 8 0
68 [AMF99] V0230 EB* 01 05 00.02 +02 09 30.1   20.97 20.82 20.67 20.92 ~ 2 0
69 [F88b] 1-199 Ce* 01 05 00.3 +02 08 57   22.69 22.80 22.81   ~ 3 0
70 [AMF99] V0702 V* 01 05 00.3 +02 11 43           ~ 1 0
71 [AMF99] V1598 V* 01 05 00.4 +02 09 10           ~ 2 0
72 [AMF99] V2124 Ir* 01 05 00.4 +02 09 25           ~ 1 0
73 [AMF99] V0078 Ce* 01 05 00.62 +02 08 36.5   21.23 20.74 20.43 20.09 ~ 3 0
74 [AMF99] V1798 Ce* 01 05 00.7 +02 10 51           ~ 2 0
75 [AMF99] V0033 EB* 01 05 00.80 +02 08 20.8   23.22 22.50 22.21 22.35 ~ 2 0
76 [AMF99] V2396 Ce* 01 05 00.8 +02 10 44   19.10 17.75 17.14 16.62 ~ 12 0
77 [F88b] 1-277 Ce* 01 05 00.8 +02 11 03   23.06 22.75 22.31   ~ 3 0
78 [AMF99] V2033 Ir* 01 05 00.9 +02 11 09           ~ 1 0
79 [F88b] 1-284 Ce* 01 05 01.0 +02 11 10   24.57 21.97 20.71 19.41 ~ 3 0
80 [AMF99] V0861 Ir* 01 05 01.0 +02 08 52           ~ 1 0
81 [AFF2006] 8284-2 Ce* 01 05 01.15 +02 09 11.5   22.27 21.655 21.41 20.89 ~ 6 0
82 [AMF99] V1371 Ce* 01 05 01.2 +02 11 35           ~ 2 0
83 [AMF99] V0663 Ir* 01 05 01.3 +02 11 39           ~ 1 0
84 [AMF99] V1241 Ce* 01 05 01.4 +02 09 12           ~ 2 0
85 [AMF99] V2598 V* 01 05 01.6 +02 09 13           ~ 1 0
86 [F88b] 1-380 Ce* 01 05 01.6 +02 10 02   22.48 22.02 21.86   ~ 3 0
87 [S71b] V38 s*r 01 05 01.6710117528 +02 08 39.345099036   17.71 16.74 15.881 15.24 M0Ia 14 0
88 [AMF99] V2262 Ce* 01 05 01.9 +02 09 34           ~ 2 0
89 [S71b] V39 Ce* 01 05 02.0427516600 +02 10 24.858333840   19.47 18.851 18.422 17.617 ~ 17 0
90 [AMF99] V0479 Ce* 01 05 02.1 +02 10 33           ~ 2 0
91 [AMF99] V0707 V* 01 05 02.1 +02 11 46           ~ 1 0
92 [F88b] 1-443 WV* 01 05 02.2 +02 09 07   21.99 22.34     ~ 3 0
93 [AFF2006] 3839-2 Ce* 01 05 02.44 +02 09 30.1   22.15 21.439 21.08 20.82 ~ 7 0
94 [S71b] V56 Ir* 01 05 02.63 +02 10 51.8   19.16 17.91 17.16 16.49 ~ 5 0
95 [F88b] 1-500 Ce* 01 05 02.7 +02 08 52   23.96 22.71 22.39 21.38 ~ 3 0
96 [AMF99] V0252 V* 01 05 02.8 +02 09 30           ~ 1 0
97 [MWF2015] 1206 Ce* 01 05 02.8067958624 +02 10 35.399212716   20.62 19.988 19.53 19.11 ~ 10 0
98 [AMF99] V2521 Ir* 01 05 03.0 +02 08 48           ~ 1 0
99 [AMF99] V1130 Ir* 01 05 03.1 +02 11 31           ~ 1 0
100 [F88b] 1-580 Ce* 01 05 03.4 +02 10 47   22.01 22.13     ~ 3 0
101 [AMF99] V2199 EB* 01 05 03.5 +02 08 17           ~ 1 0
102 [AMF99] V0106 Ir* 01 05 03.6 +02 08 45           ~ 1 0
103 [AFF2006] 4313-2 Ce* 01 05 03.7 +02 10 22     21.97 21.63 21.40 ~ 3 0
104 [AMF99] V2782 V* 01 05 03.7 +02 08 29           ~ 1 0
105 [S71b] V40 LP* 01 05 03.9 +02 11 53           ~ 3 0
106 [AMF99] V0490 EB* 01 05 04.0 +02 10 37           ~ 1 0
107 [AMF99] V2100 Ce* 01 05 04.5 +02 08 58           ~ 2 0
108 [AMF99] V0909 V* 01 05 04.5 +02 09 20           ~ 1 0
109 [AFM2000] V2221-A Ce* 01 05 04.7 +02 08 47           ~ 3 0
110 [F88b] 1-711 Ce* 01 05 04.9 +02 09 45   22.71 22.32 22.13 22.11 ~ 3 0
111 [F88b] 1-723 Ce* 01 05 05.0 +02 10 54   23.28 22.78 22.31   ~ 3 0
112 [AMF99] V1701 EB* 01 05 05.1 +02 09 56           ~ 1 0
113 [AMF99] V3106 Ir* 01 05 05.1 +02 10 48   20.20 20.44 20.43 20.53 ~ 3 0
114 [S71b] V43 s*r 01 05 05.1410481936 +02 11 54.636954108   18.7   16.288   M1I 8 0
115 [AFF2006] 4613-2 Ce* 01 05 05.34 +02 11 06.9   21.93 21.698 21.34 21.14 ~ 6 0
116 [AMF99] V0842 Ir* 01 05 05.8 +02 08 43           ~ 1 0
117 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5488 1
118 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1196 3
119 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1496 0
120 NAME Local Group GrG ~ ~           ~ 7638 0

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2022.05.24-02:13:13

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