2014MNRAS.440.1345F


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.22CEST00:28:14

2014MNRAS.440.1345F - Mon. Not. R. Astron. Soc., 440, 1345-1364 (2014/May-2)

The planetary nebula Abell 48 and its [WN] nucleus.

FREW D.J., BOJICIC I.S., PARKER Q.A., STUPAR M., WACHTER S., DEPEW K., DANEHKAR A., FITZGERALD M.T. and DOUCHIN D.

Abstract (from CDS):

We have conducted a detailed multi-wavelength study of the peculiar nebula Abell 48 and its central star. We classify the nucleus as a helium-rich, hydrogen-deficient star of type [WN4-5]. The evidence for either a massive WN or a low-mass [WN] interpretation is critically examined, and we firmly conclude that Abell 48 is a planetary nebula (PN) around an evolved low-mass star, rather than a Population I ejecta nebula. Importantly, the surrounding nebula has a morphology typical of PNe, and is not enriched in nitrogen, and thus not the `peeled atmosphere' of a massive star. We estimate a distance of 1.6kpc and a reddening, E(B - V) = 1.90mag, the latter value clearly showing the nebula lies on the near side of the Galactic bar, and cannot be a massive WN star. The ionized mass ( ∼ 0.3 M) and electron density (700/cm3) are typical of middle-aged PNe. The observed stellar spectrum was compared to a grid of models from the Potsdam Wolf-Rayet (PoWR) grid. The best-fitting temperature is 71 kK, and the atmospheric composition is dominated by helium with an upper limit on the hydrogen abundance of 10 percent. Our results are in very good agreement with the recent study of Todt et al., who determined a hydrogen fraction of 10 percent and an unusually large nitrogen fraction of ∼ 5 percent. This fraction is higher than any other low-mass H-deficient star, and is not readily explained by current post-AGB models. We give a discussion of the implications of this discovery for the late-stage evolution of intermediate-mass stars. There is now tentative evidence for two distinct helium-dominated post-AGB lineages, separate to the helium- and carbon-dominated surface compositions produced by a late thermal pulse. Further theoretical work is needed to explain these recent discoveries.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): stars: evolution - stars: Wolf-Rayet - planetary nebulae: general - planetary nebulae: individual: Abell 48

CDS comments: MPR 8 and Kn 15 are not in Simbad.

Simbad objects: 68

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Number of rows : 68

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 KPD 0005+5106 WD* 00 08 18.1706793307 +51 23 16.594540226 11.80 13.04 13.32 13.53   DOZ1 118 0
2 NGC 40 PN 00 13 01.0170260109 +72 31 19.032886305   11.63 11.46     [WC8] 595 2
3 BD+37 442 HS* 01 58 33.4340086125 +38 34 23.846108332   9.69 9.92     sdOHe 61 0
4 PN Lo 1 PN 02 56 58.4329330049 -44 10 17.842640483   14.61       ~ 43 0
5 NGC 1535 PN 04 14 15.7689951134 -12 44 21.934169738   12.01 12.82     sdO3: 504 0
6 SH 2-216 PN 04 43 21.2636696575 +46 42 05.836016165   12.50 12.87 13.04   DAO.6 153 2
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15433 1
8 M 42 HII 05 35 17.3 -05 23 28           ~ 3804 0
9 SMP LMC 83 PN 05 36 20.7216020344 -67 18 07.659774493 15.56 16.225 14.948   16.558 [WN4.5:] 140 0
10 PN K 1-27 PN 05 57 02.1748480138 -75 40 22.475592752     16.04 16.27 16.41 sdOHe 80 0
11 HD 45166 WR* 06 26 19.1550467867 +07 58 28.071465236 9.05 9.81 9.88     WRpec+B8V 72 1
12 HD 49798 HXB 06 48 04.7000758397 -44 18 58.432035331 6.758 8.017 8.287 8.391 8.543 sdO6 289 0
13 NGC 2392 PN 07 29 10.7669120392 +20 54 42.478515772     9.68     O6f 703 1
14 CD-45 5058 HS* 09 20 10.1321975829 -45 31 54.939916304 9.81 11.03 11.33 11.62   sdO 50 0
15 PN G272.8+01.0 PN 09 28 40.6 -49 36 44           [WC4:] 19 1
16 PN Lo 4 PN 10 05 45.7878014012 -44 21 33.523563573           sdO 128 1
17 CD-34 6792 PM* 10 32 13.6185042385 -35 37 41.710291605   12.84 11.84     F:wl: 130 0
18 Hewett 1 HII 10 37 00.0 +00 18 00           ~ 7 1
19 PG 1034+001 WD* 10 37 03.8005751967 -00 08 19.122434186 11.589 12.863 13.228 13.383 13.587 DO 109 0
20 V* DN Leo Pu* 10 38 55.2344094277 +10 03 48.485524647   9.76 9.93     Bp 139 0
21 * eta Car Em* 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 4.90 4.41 OBepec 2274 0
22 WRAY 15-682 WR* 10 53 59.5776214569 -60 26 44.358376205   11.64 10.85 10.56   WN11h 140 3
23 V* AG Car WR* 10 56 11.5779283438 -60 27 12.809532379 7.00 7.57 6.96 7.73   WN11h 602 0
24 HD 96548 WR* 11 06 17.2033098417 -65 30 35.237611013 7.10 7.80 7.70 8.49   WN8h 396 0
25 MR 35 s*b 11 08 40.0633818066 -60 42 51.718989987   12.33 10.20 11.66   LBV 119 0
26 PN PB 8 PN 11 33 17.8154413787 -57 06 14.926075766     14.00     [WC5/6] 110 0
27 ESO 320-28 PN 11 52 29.2564882729 -42 17 38.944225510           ~ 52 0
28 V* GW Vir WD* 12 01 45.9728868857 -03 45 40.627851273   14.87 15.04     DOQZ1 470 0
29 WR 47a WR* 12 45 51.2509108395 -64 09 38.049177096   17.25 15.30     WN8h 23 0
30 HS 1522+6615 WD* 15 22 56.6961693247 +66 04 42.031617922   16.4       DO 24 0
31 V* R CrB RC* 15 48 34.4147978750 +28 09 24.298218765 6.44 6.31 5.71 5.26 5.08 G0Iep 762 0
32 PMR 5 WR* 16 19 40.1911099790 -49 13 59.027412470           [WN6]: 31 2
33 NAME PCG 11 WR* 16 33 48.7366700550 -49 28 44.011452419   17.01 15.15   12.15 WN7h 7 1
34 HD 148937 SB* 16 33 52.3867163783 -48 06 40.476619334 6.49 7.12 6.71 7.61   O6f?p 362 4
35 PN G333.4-04.3 PN 16 41 04.3868766499 -53 02 24.693327763           [WC4]pec 13 1
36 V* V652 Her pA* 16 48 04.6939316336 +13 15 42.415029639   10.31 10.51     ~ 127 0
37 IC 4663 PN 17 45 28.6294985056 -44 54 17.982999895           [WN3] 93 0
38 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12263 0
39 V* V4334 Sgr CV* 17 52 32.69 -17 41 08.0   12.01       F2Ia 340 0
40 PN A66 43 PN 17 53 32.2767918769 +10 37 24.211581466   14.53 14.71     O7fk 127 0
41 PHR J1757-1649 PN 17 57 39.6193339672 -16 49 19.682235299           ~ 6 1
42 PN M 1-37 PN 18 05 25.81 -28 22 04.3     14.70     [WC11]? 119 0
43 NGC 6572 PN 18 12 06.3140077888 +06 51 13.030152295   9.3 10.8     [WC] 740 0
44 SH 2-68 PN 18 24 58.4294144035 +00 51 36.016896875   16.0 16.5     DAOZ.6 124 1
45 PN G009.8-07.5 PN 18 36 22.820 -23 55 18.26       13.52 12.44 ~ 93 0
46 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1258 0
47 PN A66 48 PN 18 42 46.9212159851 -03 13 17.299855752   19.40   16.67   [WN6o] 56 0
48 LS IV +00 5 WR* 18 52 17.5478446631 +00 59 44.304523477       13.77 12.25 WN10 42 0
49 M 57 PN 18 53 35.0969571234 +33 01 44.883146221   15.405 15.769 15.901 16.062 DA(O?) 797 2
50 CD-51 11879 HS* 19 02 11.7422717452 -51 30 09.556345077   11.44 11.55     sdO 35 0
51 PN A66 52 PN 19 04 32.342 +17 57 07.13           ~ 27 0
52 NGC 6751 PN 19 05 55.5385116189 -05 59 32.291075445   15.78 15.48     [WC4] 321 0
53 Hen 2-427 WR* 19 11 30.8750511254 +16 51 38.199008052   12.19 11.50     WN8h 323 0
54 PN A66 58 PN 19 18 20.476 +01 46 59.62           [WC4] 293 0
55 V* CK Vul CV* 19 47 37.9563868576 +27 18 41.788878128           ~ 115 0
56 Hen 1-5 pA* 20 11 56.064360 +20 20 04.17624 11.41 10.66 9.45     G8/K0Iae 495 0
57 HD 192163 WR* 20 12 06.5420067895 +38 21 17.783840972 7.12 7.49 7.50     WN6(h)-s 526 0
58 NGC 6888 ISM 20 12 07 +38 21.3   7.44       WN6b(h) 262 1
59 MWP 1 PN 21 17 08.2817539788 +34 12 27.415871206     12.33     PG1159 175 0
60 Lan 384 UV 21 23 09.3 +38 58 11   16.5       ~ 8 1
61 [D75b] Em* 21-021 PN 21 29 58.4712776885 +51 04 00.323547316   15.66 14.20 13.89   O7(f)/[WC11] 229 0
62 PN G065.0-27.3 PN 21 29 59.38 +12 10 27.5   13.39 14.06     sdO 277 0
63 NGC 7094 PN 21 36 52.9688055651 +12 47 19.100520826     13.35     ~ 179 0
64 HS 2209+8229 WD? 22 08 25.8770882750 +82 44 51.412639578   16.0       DO/sdO 13 0
65 NGC 7293 PN 22 29 38.5453078023 -20 50 13.746093105 11.894 13.158 13.524 13.689 13.898 DAO.5 910 0
66 V* V409 And WD* 23 27 15.9352164958 +40 01 23.428438900   14.1 15.41     DO 71 0
67 NAME Galactic Bar reg ~ ~           ~ 984 0
68 NAME Sct-Cen PoG ~ ~           ~ 153 0

    Equat.    Gal    SGal    Ecl

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2021.06.22-00:28:14

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