2008A&A...477..535P


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.30CET22:21:06

2008A&A...477..535P - Astronomy and Astrophysics, volume 477, 535-541 (2008/1-2)

High-resolution spectroscopic observations of the peculiar planetary nebula Me1-1.

PEREIRA C.B., MIRANDA L.F., SMITH V.V. and CUNHA K.

Abstract (from CDS):

We determined the atmospheric parameters and evolutionary state of the cool stellar component of the peculiar planetary nebula Me1-1 and analyzed its spatio-kinematic structure. High-resolution optical spectroscopy was used in an abundance analysis of the cool component in Me1-1. Narrow-band images were used to study the nebula. The stellar parameters derived for the cool star in Me1-1 are Teff=4500K and logg=2.0, which correspond to a spectral type of K(1-2) II. This star is rapidly rotating with a projected rotational velocity of Vrot=90km/s. Its estimated mass is 3.5M with a distance of 6kpc and a luminosity of 370L. The cool star in Me1-1 has nearly solar iron and calcium abundances. Barium, a monitor of s-process nucleosynthesis, is not enriched. We show that this cool star has reached the base of the RGB and its accreted matter has been diluted by the deepening convective envelope. The images strongly suggest that Me1-1 is an edge-on ring with incipient bipolar lobes. The central star is displaced ∼400AU from the center of the nebula. The expansion velocity of the ring ranges from 10 and 13km/s in the different emission lines. Broad (≃600km/s) wings are detected in the Hα emission, probably with a stellar origin. A comparison of Me1-1 with other ring-like planetary nebula shows that most of them host off-center binary central stars.

Abstract Copyright:

Journal keyword(s): ISM: planetary nebulae: individual: Me 1-1 - stars: binaries: general - stars: late-type - stars: abundances

CDS comments: In chap. 4.3 : For the reference VAZQUEZ & al. 1999 read 2002 instead of 1999.

Simbad objects: 12

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Number of rows : 12

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 IC 2149 PN 05 56 23.9008985692 +46 06 17.206983220   11.21 11.35     O7.5 419 0
3 EM* AS 201 PN 08 31 42.8825036476 -27 45 31.541479213   13 11.80     F9III 87 0
4 PN A66 35 PN 12 53 32.7840615552 -22 52 22.614854036   10.52 9.69     G8III-IV+DAO 180 1
5 PN LoTr 5 PN 12 55 33.7461986779 +25 53 30.561300806   9.72 8.88     G5III-IV 196 0
6 PN SuWt 2 PN 13 55 43.2309300395 -59 22 39.814516369   12.01 11.52 12.01 11.40 ~ 70 1
7 HD 330036 Em* 15 51 15.92914 -48 44 58.5409   13.09 11.28     F5III-IV 152 1
8 PN Sp 1 PN 15 51 40.9511032767 -51 31 28.544655619   14.43 13.98 13.86   O(H)3-5(fc) 130 0
9 PN M 4-12 PN 19 13 05.239 +15 46 39.80           ~ 78 0
10 PN Me 1-1 PN 19 39 09.8201107636 +15 56 48.274244829           ~ 120 0
11 EM* StHA 190 Sy* 21 41 44.8880611733 +02 43 54.409367196   11.13 10.22     G5e 41 0
12 PN G102.9-02.3 PN 22 26 17.2674869613 +54 49 38.242993746   17.825 16.965 16.397 15.743 ~ 70 0

    Equat.    Gal    SGal    Ecl

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2020.11.30-22:21:06

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