2018A&A...609A.126S


Query : 2018A&A...609A.126S

2018A&A...609A.126S - Astronomy and Astrophysics, volume 609A, 126-126 (2018/1-1)

Expansion patterns and parallaxes for planetary nebulae.

SCHONBERNER D., BALICK B. and JACOB R.

Abstract (from CDS):

Aims. We aim to determine individual distances to a small number of rather round, quite regularly shaped planetary nebulae by combining their angular expansion in the plane of the sky with a spectroscopically measured expansion along the line of sight.
Methods. We combined up to three epochs of Hubble Space Telescope imaging data and determined the angular proper motions of rim and shell edges and of other features. These results are combined with measured expansion speeds to determine individual distances by assuming that line of sight and sky-plane expansions are equal. We employed 1D radiation-hydrodynamics simulations of nebular evolution to correct for the difference between the spectroscopically measured expansion velocities of rim and shell and of their respective shock fronts.
Results. Rim and shell are two independently expanding entities, driven by different physical mechanisms, although their model-based expansion timescales are quite similar. We derive good individual distances for 15 objects, and the main results are as follows: (i) distances derived from rim and shell agree well; (ii) comparison with the statistical distances in the literature gives reasonable agreement; (iii) our distances disagree with those derived by spectroscopic methods; (iv) central-star "plateau" luminosities range from about 2000L to well below 10000L, with a mean value at about 5000L, in excellent agreement with other samples of known distance (Galactic bulge, Magellanic Clouds, and K648 in the globular cluster M 15); (v) the central-star mass range is rather restricted: from about 0.53 to about 0.56M, with a mean value of 0.55M.
Conclusions. The expansion measurements of nebular rim and shell edges confirm the predictions of radiation-hydrodynamics simulations and offer a reliable method for the evaluation of distances to suited objects.

Abstract Copyright: © ESO, 2018

Journal keyword(s): planetary nebulae: general - stars: fundamental parameters - techniques: image processing - techniques: spectroscopic

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 - 2023
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10455 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6487 1
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16387 1
4 IC 418 PN 05 27 28.2059533560 -12 41 50.282287764   9.405 9.010 10.118   O7fp 1021 2
5 NGC 2392 PN 07 29 10.7671398096 +20 54 42.474888072     9.68     O6f 713 1
6 IC 2448 PN 09 07 06.3191779848 -69 56 30.692677668   11.1 11.10     O(H)3III-V 230 0
7 NGC 3132 PN 10 07 01.7656422504 -40 26 11.130553032   10.14 10.01     A2V 383 1
8 NGC 3242 PN 10 24 46.1335521792 -18 38 32.296857792   11.83 12.15     ~ 814 1
9 NGC 3918 PN 11 50 17.7709504944 -57 10 57.017302428   10.0 8.5     ~ 375 0
10 NGC 5882 PN 15 16 49.9562553264 -45 38 58.616280132   11.9 10.9     ~ 271 0
11 IC 4593 PN 16 11 44.5479462840 +12 04 17.031388584   10.91 10.84     O7fp 448 0
12 NGC 6210 PN 16 44 29.5191019368 +23 47 59.421958296   12.3 11.7     Of/[WR] 582 0
13 NGC 6543 PN 17 58 33.4039587288 +66 37 58.750734000   11.09 11.28     [WC] 1149 1
14 NGC 6565 PN 18 11 52.4858232888 -28 10 42.421241244   12.5 12.2 12.12   PN 224 0
15 NGC 6578 PN 18 16 16.517 -20 27 02.67           [WC4/6] 202 0
16 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 1918 0
17 HD 184738 PN 19 34 45.2337620448 +30 30 58.950651240   10.41 10.44     [WC9] 937 0
18 NGC 6826 PN 19 44 48.1500225888 +50 31 30.249034932   10.21 9.6     O6fp 713 0
19 NGC 6881 PN 20 10 52.45 +37 24 42.4           ~ 202 0
20 NGC 6886 PN 20 12 42.83 +19 59 22.6           ~ 318 0
21 NGC 6891 PN 20 15 08.8435405584 +12 42 15.584146740   12.11 12.51     O3Ib(f*) 390 0
22 NGC 7009 PN 21 04 10.8155187648 -11 21 48.580157556   12.48 12.07     ~ 985 1
23 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2412 1
24 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3051 0
25 PN Ps 1 PN 21 29 59.38 +12 10 27.5   13.39 14.06     sdO 282 0
26 NGC 7662 PN 23 25 53.6 +42 32 06   9.4 12     ~ 921 0
27 NAME Galactic Bulge reg ~ ~           ~ 3965 0

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2022.11.28-06:00:24

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