2011A&A...530A.107V

Query : 2011A&A...530A.107V

2011A&A...530A.107V - Astronomy and Astrophysics, volume 530A, 107-107 (2011/6-1)

A new planetary nebula in the outer reaches of the Galaxy.

VIIRONEN K., MAMPASO A., CORRADI R.L.M., DREW J.E., FREW D.J., GIAMMANCO C., GREIMEL R., LIIMETS T., LINDBERG J.E., RODRIGUEZ M., SABIN L., SALE S.E., WILSON P.A. and ZIJLSTRA A.

Abstract (from CDS):

A proper determination of the abundance gradient in the Milky Way requires the observation of objects at large galactiocentric distances. With this aim, we are exploring the planetary nebula population towards the Galactic anticentre. In this article, the discovery and physico-chemical study of a new planetary nebula towards the anticentre direction, IPHASX J052531.19+281945.1 (PNG 178.1-04.0), is presented. The planetary nebula was discovered from the IPHAS survey. Long-slit follow-up spectroscopy was carried out to confirm its planetary nebula nature and to calculate its physical and chemical characteristics. The newly discovered planetary nebula turned out to be located at a very large galactocentric distance (DGC=20.8±3.8kpc), larger than any previously known planetary nebula with measured abundances. Its relatively high oxygen abundance (12+log(O/H)=8.36±0.03) supports a flattening of the Galactic abundance gradient at large galactocentric distances rather than a linearly decreasing gradient.

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Journal keyword(s): Galaxy: abundances

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Per Arm PoG 03 30 +45.0           ~ 1513 0
2 PN K 3-64 PN 04 13 27.255 +51 51 00.92           ~ 22 0
3 PN K 3-66 PN 04 36 37.2375115440 +33 39 30.074689980           O 76 0
4 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1090 0
5 PN G178.1-04.0 PN 05 25 31.19 +28 19 45.1           ~ 3 0
6 NAME Gal Anticenter reg 05 46 +28.9           ~ 911 0
7 PN K 3-70 PN 05 58 45.3548777928 +25 18 43.910433216           ~ 33 0
8 PN M 1-9 PN 07 05 19.2001625040 +02 46 59.452173768           ~ 88 0
9 BD+33 2642 pA* 15 51 59.8854348048 +32 56 54.329485272 9.806 10.61 10.73 10.884 10.961 O7p 429 0
10 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14406 0
11 NAME Monoceros Stream St* ~ ~           ~ 358 1

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