2003AJ....126..887M

Query : 2003AJ....126..887M

2003AJ....126..887M - Astron. J., 126, 887-892 (2003/August-0)

Weak emission-line central stars of planetary nebulae.

MARCOLINO W.L.F. and DE ARAUJO F.X.

Abstract (from CDS):

We present new spectroscopic data of 14 candidates for the weak emission-line type of central stars of planetary nebulae ([WELS]). With a medium resolution of about 2 Å, we confirmed the main spectral characteristics of these stars but found that two objects of our sample are in fact early-type [WC] ([WCE]) stars. The λ4650 and C IV λλ 5801, 5812 features are resolved, and they were used in a tentative classification. Based on the C IV lines the [WELS] stars of our sample can be divided qualitatively into two main groups: clear emission and very weak or no emission. We compared mean equivalent widths of carbon and oxygen lines of the [WELS] stars with those of the [WCE] and [WCL] types. The results are not conclusive but point in favor of an increase in temperature from [WCL] to [WCE], followed perhaps by a decrease from [WCE] to [WELS].

Abstract Copyright: ∼

Journal keyword(s): ISM: Planetary Nebulae: General - Stars: AGB and Post-AGB - Stars: Fundamental Parameters - Stars: Wolf-Rayet

Simbad objects: 23

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Number of rows : 23
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 PN M 3-6 PN 08 40 40.2260788368 -32 22 33.595889196     12.79     [WC] 115 0
2 CD-32 5613 WD* 08 41 32.4290850497 -32 56 32.915823461   12.07 11.85 12.3   DA5.5 325 0
3 * eta Hya bC* 08 43 13.4757536071 +03 23 55.182801587 3.380 4.100 4.300 4.37 4.56 B3V 418 1
4 PN A66 30 PN 08 46 53.4639874872 +17 52 46.369394580   14.23 14.30 13.47   [WC5] 431 0
5 PN Lo 4 PN 10 05 45.7880109408 -44 21 33.523482384           sdO 146 1
6 * lam Cen * 11 35 46.8780907704 -63 01 11.405976996 2.96 3.10 3.14 3.10 3.11 B9III 138 0
7 WRAY 16-117 PN 12 30 30.4344727152 -64 52 05.689186752   14.55 15.00     [WC4] 130 0
8 CPD-51 6744 PN 14 18 08.8853838456 -52 10 39.516692592   12.39 11.98     [WC] 158 0
9 * 108 Vir * 14 45 30.2044637184 +00 43 02.180202816   5.656 5.665     B9.5V 165 0
10 NGC 5873 PN 15 12 50.8605628680 -38 07 31.585496844   11.6 9.7     [WC] 146 0
11 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 526 0
12 PN Cn 2-1 PN 17 54 33.010 -34 22 21.15     12.70 14.47 13.70 ~ 136 0
13 PN H 1-41 PN 17 57 19.1084978568 -34 09 48.784614372           [WC] 93 0
14 PN M 2-31 PN 18 13 16.0521431976 -25 30 05.320920636   13.3 13.60     [WC4/6] 110 0
15 NGC 6629 PN 18 25 42.4541775576 -23 12 10.551587436   11.90 9.9     [WC5/6] 271 0
16 PN Vy 2-1 PN 18 27 59.6260402536 -26 06 48.065269284   12.8 13.20     [WC] 94 0
17 EM* AS 350 PN 19 18 19.548 -11 06 16.22   14       [WR] 42 0
18 PN M 1-73 PN 19 41 09.2937490896 +14 56 58.980006096           O3.5If 85 1
19 NGC 6818 PN 19 43 57.770472 -14 09 13.36932     9.3     ~ 357 1
20 CD-30 17706 WD* 20 10 56.8486912016 -30 13 06.627142663 11.654 12.286 12.242 12.311 12.381 DA3.1 267 0
21 NGC 6891 PN 20 15 08.8435405584 +12 42 15.584146740   12.11 12.51     O3Ib(f*) 405 0
22 IC 4997 PN 20 20 08.7557973960 +16 43 53.698933380   11.94 11.15     [WC7/8] 555 0
23 PN A66 78 PN 21 35 29.3816259120 +31 41 45.449196108   13.04 13.25     [WC5] 336 0

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