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 (D_GC=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.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: abundances

Simbad objects: 11

Full paper

View the references in ADS

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 - 2023	#notes
1	NAME Per Arm	PoG	03 30	+45.0						~	1443	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	73	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	1065	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						~	847	0
7	PN K 3-70	PN	05 58 45.3548777928	+25 18 43.910433216						~	32	0
8	PN M 1-9	PN	07 05 19.2001625040	+02 46 59.452173768						~	87	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	414	0
10	NAME Galactic Center	reg	17 45 39.60213	-29 00 22.0000						~	13555	0
11	NAME Monoceros Stream	St*	~	~						~	347	1

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