2006A&A...457..237Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET19:23:13

2006A&A...457..237Z - Astronomy and Astrophysics, volume 457, 237-248 (2006/10-1)

Pulsating pre-main sequence stars in IC 4996 and NGC 6530.

ZWINTZ K. and WEISS W.W.

Abstract (from CDS):

Asteroseismology of pulsating pre-main sequence (PMS) stars has the potential of testing the validity of current models of PMS structure and evolution. As a first step, a sufficiently large sample of pulsating PMS stars has to be established, which allows to select candidates optimally suited for a detailed asteroseismological analysis based on photometry from space or ground based network data. A search for pulsating PMS members in the young open clusters IC 4996 and NGC 6530 has been performed to improve the sample of known PMS pulsators. As both clusters are younger than 10 million years, all members with spectral types later than A0 have not reached the zero-age main sequence yet. Hence, IC 4996 and NGC 6530 are most suitable to search for PMS pulsation among their A- and F-type cluster stars. CCD time series photometry in Johnson B and V filters has been obtained for IC 4996 and NGC 6530. The resulting light curves for 113 stars in IC 4996 and 194 stars in NGC 6530 have been subject to detailed frequency analyses. 2 δ Scuti-like PMS stars have been discovered in IC 4996 and 6 in NGC 6530. For another PMS star in each cluster, pulsation can only be suspected. According to the computed pulsation constants, the newly detected PMS stars seem to prefer to pulsate in a similar fashion to the classical δ Scuti stars, and with higher overtone modes.

Abstract Copyright:

Journal keyword(s): techniques: photometric - stars: pre-main sequence - δ Scuti - open clusters and associations: individual: IC 4996 - open clusters and associations: individual: NGC 6530

Nomenclature: Tables 1, 6: Cl* IC 4996 ZW NNN N=18 among (Nos 10-108). Tables 3, 7: Cl* NGC 6530 ZW NNN N=27 among (Nos 5-305).

Simbad objects: 49

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Number of rows : 49

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V588 Mon dS* 06 39 05.9034782739 +09 41 03.436577731   9.93 9.75     A5/7 52 0
2 V* V589 Mon dS* 06 39 28.4638678350 +09 42 03.963430050   10.6 10.3     F0/2 57 0
3 V* V856 Sco Ae* 16 08 34.2868591379 -39 06 18.326059778 7.66 7.41 7.05 6.92   A7IIIne_sh 356 0
4 M 8 HII 18 03 37 -24 23.2           ~ 559 1
5 NGC 6530 13 * 18 04 00.14 -24 15 02.6   13.779 13.343   12.805 ~ 9 0
6 HD 315025 Y*O 18 04 07.3428687653 -24 19 26.193152123 11.210 11.001 10.756 10.84 10.279 B8 22 0
7 NGC 6530 20 * 18 04 07.7300077125 -24 17 27.688055069   14.747 14.084   13.236 ~ 5 0
8 NGC 6530 28 * 18 04 09.7940582760 -24 12 21.189422676   13.589 13.199   12.678 ~ 10 0
9 NGC 6530 38 * 18 04 13.8677065054 -24 13 28.116783291   12.659 12.155   11.492 A2 17 0
10 2MASS J18041403-2423390 Y*O 18 04 14.043 -24 23 38.81 16.553 15.481 14.459   13.161 ~ 8 0
11 2MASS J18041429-2416408 Y*O 18 04 14.3026216772 -24 16 40.731810199   12.828 12.502   12.017 ~ 13 0
12 2MASS J18041461-2421554 Y*O 18 04 14.6303707406 -24 21 55.544932001 16.007 14.531 13.353   11.878 ~ 10 0
13 2MASS J18041690-2424147 Y*O 18 04 16.9121139692 -24 24 14.612553696 16.772 15.604 14.402   12.839 ~ 8 0
14 2MASS J18042055-2424556 Y*O 18 04 20.5599245745 -24 24 55.496208387 14.562 13.649 13.050   12.127 G0? 17 0
15 NGC 6530 57 * 18 04 21.6830029807 -24 15 47.014432853   14.268 13.645   12.764 ~ 9 0
16 2MASS J18042740-2423563 Y*O 18 04 27.4063621285 -24 23 56.261684114 15.824 14.845 13.799   12.435 ~ 8 0
17 2MASS J18042860-2418567 Y*O 18 04 28.6070999946 -24 18 56.707450921   15.170 14.186   12.968 ~ 11 0
18 NGC 6530 151 * 18 04 29.3755871526 -24 09 34.916596987   12.986 12.153   10.888 A9 8 0
19 NGC 6530 78 * 18 04 30.70 -24 23 41.6   14.550 13.972   13.214 ~ 8 0
20 Cl* NGC 6530 ZW 70 Y*O 18 04 30.83 -24 26 34.5   16.379 15.081   13.424 ~ 8 0
21 NGC 6530 OpC 18 04 31 -24 21.5   4.74 4.6     ~ 356 1
22 2MASS J18043225-2424103 Y*O 18 04 32.2615381349 -24 24 10.246370899 16.895 15.791 14.639   13.133 G7-G8V 11 0
23 2MASS J18043441-2428057 Y*O 18 04 34.4093596125 -24 28 05.613185702 12.452 12.176 11.920   11.463 A0 15 0
24 NGC 6530 94 * 18 04 37.6621448615 -24 21 11.694853648   12.962 12.687   12.256 A 9 0
25 NGC 6530 159 * 18 04 42.1956099500 -24 18 03.132627238   13.997 13.596   13.112 ~ 8 0
26 HD 315019 * 18 04 44.4748971056 -24 13 42.657404967   10.5 11.3     A2 8 0
27 NGC 6530 112 * 18 04 49.2587063458 -24 20 14.919029089   15.927 14.824   13.238 ~ 5 0
28 EM* LkHA 115 Ae* 18 04 50.5998207464 -24 25 42.096542444   12.380 11.949   11.198 B7e 26 0
29 HD 315020 * 18 04 52.7152079451 -24 17 52.604716564   11.62 11.29     A3 10 0
30 CD-24 13858 * 18 05 02.2797126807 -24 17 01.932953752   12.157 11.61   11.085 ~ 9 0
31 Cl* IC 4996 DAM 32 * 20 16 21.8838964128 +37 39 34.885498942 16.54 16.10 15.30     A5 5 0
32 Cl* IC 4996 DAM 73 * 20 16 23.3195045241 +37 42 35.276646283 15.97 15.46 14.62     ~ 2 0
33 Cl* IC 4996 VBP 16 * 20 16 25.2161744867 +37 39 14.302874467 19.27 17.49 15.63     ~ 3 0
34 Cl* IC 4996 VBP 25 * 20 16 26.99 +37 38 03.1 16.83 16.38 15.25     ~ 3 0
35 Cl* IC 4996 ZW 80 * 20 16 28.16 +37 37 42.5 14.77 14.62 14.04     ~ 3 0
36 Cl* IC 4996 ZW 81 * 20 16 29.70 +37 37 25.9 14.30 14.19 13.60     ~ 2 0
37 Cl* IC 4996 DAM 30 * 20 16 29.8503199475 +37 39 30.276519209 16.21 15.78 15.03     A4 4 0
38 IC 4996 OpC 20 16 30 +37 38.0           ~ 164 0
39 IC 4996 36 * 20 16 33.1581052328 +37 39 38.808605964 13.80 13.86 13.34     ~ 4 0
40 Cl* IC 4996 ZW 51 * 20 16 33.5313170985 +37 39 21.091852293 14.30 14.25 13.66     ~ 4 0
41 IC 4996 40 * 20 16 34.2268224232 +37 38 07.229981400 13.34 13.34 12.82     ~ 3 0
42 Cl* IC 4996 VBP 105 * 20 16 38.8661080143 +37 37 56.289631042 14.42 14.34 14.55     ~ 4 0
43 IC 4996 46 * 20 16 40.3692749704 +37 41 21.763001398 13.09 13.32 12.93     ~ 2 0
44 Cl* IC 4996 ZW 46 * 20 16 43.96 +37 39 33.9 16.38 16.02 15.30     ~ 3 0
45 IC 4996 50 * 20 16 44.3244314143 +37 37 02.017745670   14.43 13.72     ~ 1 0
46 EM* VES 191 Em* 20 16 46.48 +37 41 35.4 13.15 13.02 12.36     ~ 3 0
47 Cl* IC 4996 DAM 96 * 20 16 48.0079509062 +37 41 40.197408247 16.94 16.60 15.71     ~ 2 0
48 Cl* IC 4996 ZW 89 ? ~ ~   14.36 13.81     ~ 2 0
49 Cl* IC 4996 ZW 104 ? ~ ~   14.67 14.03     ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.12.03-19:23:13

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