2010A&A...509A..13P


Query : 2010A&A...509A..13P

2010A&A...509A..13P - Astronomy and Astrophysics, volume 509, A13-13 (2010/1-1)

High- and low-resolution spectroscopic observations of the peculiar planetary-nebula HD 149427 (=PC11).

PEREIRA C.B., BAELLA N.O., DAFLON S. and MIRANDA L.F.

Abstract (from CDS):

We discuss the status of the A-type component of the binary central star in the peculiar planetary nebula HD 149427. We acquired low and high spectral resolution optical spectroscopy for the range 4500-9000Å. The analysis of the high resolution spectrum shows that the A-type star has an effective temperature of Teff=8700±150K and a surface gravity of logg=2.3±0.4, corresponding to a spectral type A3-A4II. These parameters infer a luminosity estimate of log(L/L)=3.69±0.32, implying a distance of 10±0.6kpc. The A-type star is slightly metal-poor; barium and strontium, two key elements for monitoring the s-process nucleosynthesis, are not enriched; nitrogen is enriched relative to Sun; while carbon and oxygen are underabundant. The photospheric abundance of the A-type giant star in HD 149427 is compared with the abundance in other types of stars at different evolutionary stages.

Abstract Copyright:

Journal keyword(s): planetary nebulae: individual: HD 149427 - stars: abundances - stars: fundamental parameters

Simbad objects: 14

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Number of rows : 14
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 WeBo 1 PN 02 40 14.3687650451 +61 09 16.782287585   16.25 14.45     K0III:pBa5CaIIem 33 1
2 HD 19993 Em* 03 14 01.3594913400 +37 40 26.042846754   8.77 8.26 7.9   A7/A8IIe 13 0
3 NGC 2346 PN 07 09 22.5216571385 -00 48 23.611157830   11.76 11.58     A5V 558 0
4 * a Vel * 08 46 01.6439147 -46 02 29.504226 3.86 3.91 3.91 3.86 3.73 A0II 53 0
5 CD-56 2932 PN 09 43 25.61980 -57 16 55.6095   11.85 11.17 11.21   A2II 116 0
6 NGC 3132 PN 10 07 01.7655812249 -40 26 11.138949314   10.14 10.01     A2V 374 1
7 PN A66 35 PN 12 53 32.7840615552 -22 52 22.614854036   10.52 9.69     G8III-IV+DAO 183 1
8 PN LoTr 5 PN 12 55 33.7461986779 +25 53 30.561300806   9.72 8.88     G5III-IV 199 0
9 HD 330036 Em* 15 51 15.92914 -48 44 58.5409   13.09 11.28     F5III-IV 152 1
10 HD 149427 PN 16 37 42.6988994632 -55 42 26.395035443   12.75 11.23     ~ 98 0
11 CD-53 7049 PN 17 03 02.8779937076 -53 55 53.966813453   11.84 11.48     B/Ae 56 1
12 Hen 2-289 Sy* 17 49 48.22 -37 01 27.9   7.73       M8 160 1
13 PN Me 1-1 PN 19 39 09.8201107636 +15 56 48.274244829           ~ 120 0
14 PN PM 1-322 PN 20 14 50.9 +12 03 50           ~ 13 0

    Equat.    Gal    SGal    Ecl

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2021.07.29-16:47:46

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