2005PASP..117..601A

Query : 2005PASP..117..601A

2005PASP..117..601A - Publ. Astron. Soc. Pac., 117, 601-614 (2005/June-0)

A dozen δ Scuti stars in the open cluster NGC 1817.

ARENTOFT T., BOUZID M.Y., STERKEN C., FREYHAMMER L.M. and FRANDSEN S.

Abstract (from CDS):

We obtained high-precision time-series observations of stars in the open cluster NGC 1817 in order to find δ Scuti stars among the cluster members. The detection of 12 δ Scuti stars, of which our data suggest that 11 are cluster members, makes NGC 1817 a key target for asteroseismology of 1.5-2.5 M☉stars. One of the cluster member δ Scuti stars is also an eclipsing binary, potentially offering very strong constraints for theoretical modeling. In addition, we find one δ Scuti star candidate, a γ Dor candidate, two variables of currently unknown type, and two eclipsing binary systems. We also describe a method for combining the oscillation frequencies of several δ Scuti stars in a single cluster to obtain information about the order n of the excited modes. This method will eventually be used to constrain the theoretical models to be compared with precise oscillation frequencies determined from a future multisite campaign (asteroseismology).

Abstract Copyright: ∼

Journal keyword(s): stars: individual (δ Scuti) - Stars: Oscillations - open clusters and associations: individual (NGC 1817)

Nomenclature: Tables 2, 3: Cl* NGC 1817 ABS VNN (Nos V1-V18).

Simbad objects: 30

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Number of rows : 30
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 NGC 1817 55 dS* 05 12 24.6011178696 +16 43 32.428555536   13.72 13.233     ~ 16 0
2 V* V1177 Tau dS* 05 12 26.6748914184 +16 43 53.786577792   14.53 14.147     ~ 17 0
3 Cl* NGC 1817 ABS V16 EB* 05 12 26.9500463592 +16 45 52.348342464   20.29 18.59     ~ 6 0
4 NGC 1817 4 gD* 05 12 27.8658820584 +16 40 06.192375564   15.20 14.751     ~ 13 0
5 Cl* NGC 1817 ABS V15 V* 05 12 29.2 +16 45 49   19.42 18.34     ~ 1 0
6 Cl* NGC 1817 ABS V18 EB* 05 12 29.9732051808 +16 37 29.670064752   14.71 14.241     ~ 9 0
7 NGC 1817 3 dS* 05 12 30.3664516008 +16 41 28.507777980   14.77 14.266     ~ 17 0
8 V* V1178 Tau dS* 05 12 32.2736280168 +16 44 51.832635612   13.05 12.581     ~ 20 0
9 NGC 1817 25 dS* 05 12 33.0793220458 +16 41 50.312368073   13.4 12.931     ~ 17 0
10 Cl* NGC 1817 ABS V14 V* 05 12 33.7 +16 42 00   17.14 16.34     ~ 1 0
11 NGC 1817 17 dS* 05 12 33.7070742072 +16 43 22.048241376   14.83 14.372     ~ 16 0
12 NGC 1817 OpC 05 12 33.9 +16 41 34           ~ 210 0
13 Cl* NGC 1817 ABS V13 V* 05 12 36.5280049008 +16 42 25.442535312   15.22 14.787     ~ 8 0
14 V* V1179 Tau dS* 05 12 37.3979572344 +16 42 30.929904072   14.88 14.507     ~ 13 0
15 Cl* NGC 1817 ABS V17 V* 05 12 37.5 +16 43 56   17.63 16.97     ~ 1 0
16 NGC 1817 116 dS* 05 12 40.1036459640 +16 46 07.320659988   14.11 13.743     ~ 14 0
17 V* V1180 Tau dS* 05 12 40.1622792528 +16 41 01.086814284   16.86 15.314     ~ 6 0
18 V* V1181 Tau dS* 05 12 40.8119065992 +16 42 00.324841356   13.30 12.846     ~ 17 0
19 V* V1182 Tau dS* 05 12 42.8257330056 +16 41 43.278478404   13.92 13.507     ~ 18 0
20 Cl* NGC 1817 ABS V10 dS* 05 12 43.5837481440 +16 38 45.683271312   16.80 16.309     ~ 4 0
21 V* V1183 Tau dS* 05 12 46.8369444360 +16 38 39.600015540   14.24 12.892     ~ 17 0
22 HD 35038 * 05 22 05.9808309456 +07 05 22.660926432   8.14 7.72     F2 27 0
23 NGC 2506 OpC 08 00 02.3 -10 46 22   8.28 7.6     ~ 313 0
24 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
25 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
26 V* FG Vir dS* 12 14 15.4565381808 -05 42 59.750820036   6.807 6.558     A8/9V 223 0
27 * del Sct dS* 18 42 16.4268984096 -09 03 09.188922060   5.04 4.71     F2II-III 507 0
28 NGC 7062 OpC 21 23 25.8 +46 22 46   8.99 8.3     ~ 103 0
29 V* V2449 Cyg dS* 21 23 30.5634513552 +46 21 37.662484428   13.98       ~ 9 0
30 Cl* NGC 1817 FA 146 * ~ ~   13.71 13.29     ~ 2 0

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