2018A&A...619A..84B


Query : 2018A&A...619A..84B

2018A&A...619A..84B - Astronomy and Astrophysics, volume 619A, 84-84 (2018/11-1)

When nature tries to trick us. An eclipsing eccentric close binary superposed on the central star of the planetary nebula M 3-2.

BOFFIN H.M.J., JONES D., WESSON R., BELETSKY Y., MISZALSKI B., SAVIANE I., MONACO L., CORRADI R., SANTANDER GARCIA M. and RODRIGUEZ-GIL P.

Abstract (from CDS):

Bipolar planetary nebulae (PNe) are thought to result from binary star interactions and, indeed, tens of binary central stars of PNe have been found, in particular using photometric time-series that allow for the detection of post-common envelope systems. Using photometry at the NTT in La Silla we have studied the bright object close to the centre of PN M 3-2 and found it to be an eclipsing binary with an orbital period of 1.88 days. However, the components of the binary appear to be two A or F stars, of almost equal mass, and are therefore too cold to be the source of ionisation of the nebula. Using deep images of the central star obtained in good seeing conditions, we confirm a previous result that the central star is more likely much fainter, located 2'' away from the bright star. The eclipsing binary is thus a chance alignment on top of the planetary nebula. We also studied the nebular abundance and confirm it to be a Type I PN.

Abstract Copyright: © ESO 2018

Journal keyword(s): methods: observational - binaries: eclipsing - stars: early-type - planetary nebulae: individual: PN G240.3-07.6 - stars: AGB and post-AGB

VizieR on-line data: <Available at CDS (J/A+A/619/A84): tablea1.dat tablea2.dat>

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 GD 50 WD* 03 48 50.1859724280 -00 58 32.290187664 12.596 13.787 14.063 14.210 14.388 DA1.2 249 1
2 PN M 3-2 PN 07 14 49.9223169552 -27 50 23.233595640           ~ 75 0
3 PN SuWt 2 PN 13 55 43.2309876312 -59 22 39.812544012   12.01 11.52 12.01 11.40 ~ 72 1

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2022.08.12-14:33:20

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