2008A&A...485..117S


C.D.S. - SIMBAD4 rel 1.7 - 2019.08.22CEST01:38:31

2008A&A...485..117S - Astronomy and Astrophysics, volume 485, 117-126 (2008/7-1)

Hen 2-104: a close-up look at the Southern Crab.

SANTANDER-GARCIA M., CORRADI R.L.M., MAMPASO A., MORISSET C., MUNARI U., SCHIRMER M., BALICK B. and LIVIO M.

Abstract (from CDS):

The kinematics, shaping, density distribution, expansion distance, and ionized mass of the nebula Hen 2-104, and the nature of its symbiotic Mira are investigated. A combination of multi-epoch HST images and VLT integral field high-resolution spectroscopy is used to study the nebular dynamics both along the line of sight and in the plane of the sky. These observations enable a 3-D spatio-kinematical model of the nebula to be constructed, which, with the measurement of its apparent expansion in the plane of the sky over a period of 4 years, provides the expansion parallax for the nebula. The integral-field data featuring the [SII] λλ671.7, 673.1 emission line doublet provide a density map of the inner lobes of the nebula, which with the distance estimation provide a measurement of its ionized mass. We measure densities ranging from ne=500 to 1000cm–3 in the inner lobes, and from 300 to 500cm–3 in the outer lobes. We determine an expansion-parallax distance of 3.3±0.9kpc to Hen 2-104, which implies an unexpectedly large ionized mass for the nebula of approximately one tenth of a solar mass.

Abstract Copyright:

Journal keyword(s): stars: binaries: symbiotic - ISM: planetary nebulae: general - ISM: kinematics and dynamics

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 - 2019
#notes
1 IC 2448 PN 09 07 06.3186990004 -69 56 30.690171529   11.1 11.10     ~ 220 0
2 NGC 3242 PN 10 24 46.1335198512 -18 38 32.294434711   11.83 12.15     ~ 787 1
3 NAME Homunculus Nebula ISM 10 45 03.5 -59 41 04           ~ 308 1
4 WRAY 16-147 Sy* 14 11 52.0611401558 -51 26 24.183936749     14.20     ~ 219 1
5 WRAY 16-208 Sy* 16 14 01.1073903481 -56 59 28.038473712     16.00     M8/9e 84 1
6 PN Mz 3 PN 16 17 13.3911453558 -51 59 10.706640574   10.8 14.00     O9.5 329 0
7 PN M 2-9 PN 17 05 37.952 -10 08 34.58   12.59 14.7     Be 492 0
8 NGC 6543 PN 17 58 33.4042519454 +66 37 58.748961810   11.09 11.28     [WC] 1101 1
9 NGC 6578 PN 18 16 16.517 -20 27 02.67           [WC4/6] 192 0
10 NOVA Sge 1975 No* 19 41 57.0758884476 +16 44 39.856454738   12.38 11.10     M7 431 3
11 NGC 6884 PN 20 10 23.6401227444 +46 27 39.547818788   11.9 10.9     ~ 303 1
12 NGC 6891 PN 20 15 08.8436589777 +12 42 15.585470301   12.11 12.51     O3Ib(f*) 378 0

    Equat.    Gal    SGal    Ecl

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2019.08.22-01:38:31

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