2017AJ....153...24H

Query : 2017AJ....153...24H

2017AJ....153...24H - Astron. J., 153, 24-24 (2017/January-0)

Binary central stars of planetary nebulae discovered through photometric variability. V. The central stars of HaTr 7 and ESO 330-9.

HILLWIG T.C., FREW D.J., REINDL N., ROTTER H., WEBB A. and MARGHEIM S.

Abstract (from CDS):

We find the central stars (CSs) of the planetary nebulae (PNe) HaTr 7 and ESO 330-9 to be close-binary systems. Both have orbital periods of less than half a day and contain an irradiated cool companion to the hot CS. We provide light curves, spectra, radial velocity curves, orbital periods, and binary modeling results for both systems. The binary modeling leads to system parameters, or ranges of allowed parameters for each system. We find that for the CS of HaTr 7 we need to use limb-darkening values for the cool companion that are different than the expected values for an isolated star. We also fit the CS spectrum to determine logg and temperature values independent of the binary modeling. For ESO 330-9 we find that based on our binary modeling, the hot CS is most likely a post-red giant branch (RGB) star with a mass of around 0.4 M☉. We discuss our derived stellar and nebular parameters in the broader context of close-binary CSs and their surrounding planetary nebulae (PNe). We also discuss the present status of known or suspected post-RGB stars in PNe.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: close - planetary nebulae: individual: (PN HaTr 7, ESO 330-9) - planetary nebulae: individual: (PN HaTr 7, ESO 330-9)

Simbad objects: 22

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Number of rows : 22
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 PG 0057+155 HS* 00 59 56.6673699744 +15 44 13.740284580   12.02 12.32     sdB0.2VIIIpHe8 134 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 PN K 2-2 PN 06 52 23.1654838296 +09 57 55.772161416   13.977 14.263 14.390 14.553 sdO 78 0
4 PN G219.2+07.5 PN 07 29 58.4752358832 -02 06 37.601058600 11.749 12.830 13.017 13.076 13.164 sdO 82 0
5 EGB 5 HS* 08 11 12.7657907304 +10 57 17.099384400     14.2     sdB 57 1
6 PN K 1-2 PN 08 57 45.9621412752 -28 57 36.577846476           ~ 125 1
7 Hen 2-105 PN 14 15 24.7806695640 -74 12 46.070084016           O 70 0
8 NAME PN SkAc 1 PN 14 16 21.9492012288 +13 52 24.248833788           O8/O9 31 0
9 NGC 6026 PN 16 01 21.1234809960 -34 32 35.786302980   13.2 12.50     O7 116 0
10 ESO 330-9 PN 16 02 18.1000 -41 26 49.490           ~ 16 1
11 GN 15.58.9 RNe 16 02 23 -41 27.2           ~ 2 0
12 PN HaTr 4 PN 16 45 00.042 -51 12 20.36           ~ 58 0
13 PN HDW 8 PN 17 31 47.30 -28 42 03.5           ~ 30 1
14 PN HaTr 7 PN 17 54 09.4487645808 -60 49 57.659690352   14.882 15.111 15.312 14.80 ~ 39 1
15 PN Sp 3 PN 18 07 15.8007531408 -51 01 10.214393376   12.80 12.89 13.46 13.22 O 82 0
16 PN A66 46 PN 18 31 18.5910709560 +26 56 12.110750088       15.050   O9k 190 0
17 PN Hf 2-2 PN 18 32 30.9015918072 -28 43 20.276106312     15.90     ~ 110 0
18 PN M 4-12 PN 19 13 05.4493583551 +15 46 39.915114808   16.327 15.095 15.678   ~ 100 0
19 PN HDW 11 PN 19 31 07.2261690827 -03 42 32.273784585     16.6     ~ 37 0
20 PN A66 65 PN 19 46 34.2091910232 -23 08 12.966083088   15.93 15.77 16.00 15.65 Opk 138 0
21 WD 2218+706 WD* 22 19 33.6826662264 +70 56 03.182775504   15.268 15.495 15.568 15.631 DA.7 78 1
22 LBN 120.29+18.39 PN 23 45 02.268 +80 56 59.62     14.74     ~ 47 0

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