A carbon-rich hot bubble in the planetary nebula NGC 5189

Abstract

We present the discovery of extended X-ray emission from the planetary nebula (PN) NGC 5189 around the [WO1]-type WD 1330-657 with XMM-Newton. The X-ray-emitting gas fills the cavities detected in the Hubble Space Telescope [O III] narrow-band image and presents a limb-brightened morphology towards the outer edges of the east and west lobes. The bulk of the X-ray emission is detected in the soft (0.3 - 0.7 keV) band with the XMM-Newton EPIC spectra dominated by the C VI Ly$\alpha$ line at 0.37 keV (=33.7 Å). Spectral analysis resulted in carbon and neon abundances 38 and 6 times their solar values, with a plasma temperature of $kT=0.14\pm 0.01$ keV ($T=1.6\times 10^6$ K) and X-ray luminosity of $L_{\mathrm{X}}=(2.8\pm 0.8)\times 10^{32}$ erg s${}^{-1}$. NGC 5189 is an evolved and extended PN ($\lesssim$0.70 pc in radius), thus, we suggest that the origin of its X-ray emission is consistent with the born-again scenario in which the central star becomes carbon-rich through an eruptive very late thermal pulse, subsequently developing a fast, carbon-rich wind powering the X-ray emission as suggested for A30 and A78.

9 pages; 5 figures and 1 table; Accepted to ApJ

References in corpus (12)

• The Chandra Planetary Nebulae Survey (ChanPlaNS): III. X-ray Emission from the Central Stars of Planetary Nebulae
• The hydrogen-deficient knot of the `born again' planetary nebula Abell 58 (V605 Aql)
• The Chandra Planetary Nebula Survey (ChanPlaNS). II. X-ray Emission from Compact Planetary Nebulae
• A radial velocity survey for post-common-envelope Wolf-Rayet central stars of planetary nebulae: First results and discovery of the close binary nucleus of NGC 5189
• Formation and X-ray Emission from Hot Bubbles in Planetary Nebulae. II. Hot bubble X-ray emission
• The X-Ray Spectrum of a Planetary Nebula at High Resolution: Chandra Gratings Spectroscopy of BD+30 3639
• Expansion of hydrogen-poor knots in the born-again planetary nebulae A30 and A78
• The born-again planetary nebula A78: an X-ray twin of A30
• X-Ray Emission from Jet-Wind Interaction in Planetary Nebulae
• UV spectral analysis of very hot H-deficient [WCE]-type central stars of planetary nebulae: NGC 2867, NGC 5189, NGC 6905, Pb 6, and Sand 3
• Mapping Excitation in the Inner Regions of the Planetary Nebula NGC 5189 using HST WFC3 Imaging
• Hidden IR structures in NGC 40: signpost of an ancient born-again event

Cited by in corpus (3)

• Planetary nebulae with Wolf-Rayet-type central stars -- IV. NGC 1501 and its mixing layer
• Hot bubbles of planetary nebulae with hydrogen-deficient winds. III. Formation and evolution in comparison with hydrogen-rich bubbles
• Planetary Nebulae in the eROSITA eRASS1 catalog