2002A&A...384.1062T


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET18:53:04

2002A&A...384.1062T - Astronomy and Astrophysics, volume 384, 1062-1085 (2002/3-4)

The 3-D ionization structure of the planetary nebula NGC 6565.

TURATTO M., CAPPELLARO E., RAGAZZONI R., BENETTI S. and SABBADIN F.

Abstract (from CDS):

A detailed study of the planetary nebula NGC 6565 has been carried out on long-slit echellograms (λ/Δλ=60000, spectral range = λλ3900-7750 Å) at six, equally spaced position angles. The expansion velocity field, the c(Hβ) distribution and the radial profile of the physical conditions (electron temperature and density) are obtained. The distance, radius, mass and filling factor of the nebula and the temperature and luminosity of the central star are derived. The radial ionization structure is analyzed using both the classical method and the photo-ionization code CLOUDY. Moreover, we present the spatial structure in a series of images from different directions, allowing the reader to ``see'' the nebula in 3-D. NGC 6565 results to be a young (2000-2500 years), patchy, optically thick triaxial ellipsoid (a=10.1 arcsec, a/b=1.4, a/c=1.7) projected almost pole-on. The matter close to major axis was swept-up by some accelerating agent (fast wind? ionization? magnetic fields?), forming two faint and asymmetric polar cups. A large cocoon of almost neutral gas completely embeds the ionized nebula. NGC 6565 is in a recombination phase, because of the luminosity drop of the massive powering star, which is reaching the white dwarf domain (logT*≃5.08K; logL*/L≃2.0). The stellar decline started about 1000 years ago, but the main nebula remained optically thin for other 600 years before the recombination phase occurred. In the near future the ionization front will re-grow, since the dilution factor due to the expansion will prevail on the slower and slower stellar decline. NGC 6565 is at a distance of 2.0 (±0.5) kpc and can be divided into three radial zones: the ``fully ionized'' one, extending up to 0.029-0.035pc at the equator (0.050pc at the poles), the ``transition'' one, up to 0.048-0.054pc (0.080pc), the ``halo'', detectable up to 0.110 pc. The ionized mass (≃0.03M) is only a fraction of the total mass (≥0.15M), which has been ejected by an equatorial enhanced superwind of 4(±2)x10–5M/yr lasted for 4(±2)x103 years.

Abstract Copyright:

Journal keyword(s): planetary nebulae: individual: NGC 6565 - ISM: kinematics and dynamics

Simbad objects: 27

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Number of rows : 27

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 40 PN 00 13 01.0170260109 +72 31 19.032886305   11.63 11.46     [WC8] 582 2
2 PN K 3-92 PN 02 03 41.171 +64 57 37.88           ~ 41 0
3 NGC 1501 PN 04 06 59.3919688584 +60 55 14.277444117   15.17 13.0     [WO4] 276 1
4 PN M 1-7 PN 06 37 20.966 +24 00 36.56           ~ 108 0
5 NGC 2438 PN 07 41 50.5198569363 -14 44 07.484261077           ~ 272 3
6 NGC 2440 PN 07 41 54.91 -18 12 29.7   18.9       ~ 626 2
7 NGC 3242 PN 10 24 46.1335198512 -18 38 32.294434711   11.83 12.15     ~ 790 1
8 NGC 5882 PN 15 16 49.9567882973 -45 38 58.610861335   11.9 10.9     ~ 260 0
9 PN Mz 3 PN 16 17 13.3911453558 -51 59 10.706640574   10.8 14.00     O9.5 330 0
10 NGC 6153 PN 16 31 30.5709136856 -40 15 12.646146874   10.7 15.55     ~ 281 0
11 IC 4634 PN 17 01 33.5805836299 -21 49 33.002375687   12.3 11.3     O3If 261 0
12 NGC 6302 PN 17 13 44.339 -37 06 10.95   7.1 10.10     ~ 749 1
13 PN Hb 5 PN 17 47 56.20 -29 59 39.6   10.50 10.78     ~ 249 0
14 NGC 6445 PN 17 49 15.21 -20 00 34.5   18.9       ~ 284 0
15 NGC 6537 PN 18 05 13.104 -19 50 34.88     13.58     ~ 408 1
16 NGC 6565 PN 18 11 52.558 -28 10 42.35   12.5 12.2 12.12   PN 221 0
17 PN M 2-40 PN 18 21 23.855 -06 01 55.24     15.8     ~ 58 0
18 M 57 PN 18 53 35.0969571234 +33 01 44.883146221   15.405 15.769 15.901 16.062 DA(O?) 784 2
19 NGC 6781 PN 19 18 28.085 +06 32 19.29     11.8     ~ 245 0
20 NGC 6818 PN 19 43 58.022 -14 09 13.44     9.3     ~ 337 1
21 M 27 PN 19 59 36.3632092274 +22 43 16.312364964   13.749 14.089 14.247 14.405 DAO.6 561 0
22 NGC 6886 PN 20 12 42.83 +19 59 22.6           ~ 311 0
23 NGC 7009 PN 21 04 10.8153350719 -11 21 48.581808296   12.48 12.07     ~ 951 1
24 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2303 1
25 NGC 7293 PN 22 29 38.5453078023 -20 50 13.746093105 11.894 13.158 13.524 13.689 13.898 DAO.5 884 0
26 PN M 2-53 PN 22 32 17.720 +56 10 26.12           ~ 63 0
27 NGC 7662 PN 23 25 53.6 +42 32 06   9.4 12     ~ 906 0

    Equat.    Gal    SGal    Ecl

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2019.11.21-18:53:04

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