X-ray Emission from the Binary Central Stars of the Planetary Nebulae HFG 1, DS 1, and LoTr 5

Abstract

Close binary systems undergoing mass transfer or common envelope interactions can account for the morphological properties of some planetary nebulae. The search for close binary companions in planetary nebulae is hindered by the difficulty of detecting cool, late-type, main sequence companions in binary systems with hot pre-white dwarf primaries. However, models of binary PN progenitor systems predict that mass accretion or tidal interactions can induce rapid rotation in the companion, leading to X-ray-emitting coronae. To test such models, we have searched for, and detected, X-ray emission from three binary central stars within planetary nebulae: the post-common envelope close binaries in HFG 1 and DS 1 consisting of O-type subdwarfs with late-type, main sequence companions, and the binary system in LoTr 5 consisting of O-type subdwarf and rapidly rotating, late-type giant companion. The X-ray emission in each case is best characterized by spectral models consisting of two optically-thin thermal plasma components with characteristic temperatures of about 10 MK and 15-40 MK, and total X-ray luminosities about 10^30 erg/s. We consider the possible origin of the X-ray emission from these binary systems and conclude that the most likely origin is, in each case, a corona around the late-type companion, as predicted by models of interacting binaries.

tell your friends

References in corpus (5)

• X-Ray Spectroscopy of Stars
• Binary Planetary Nebulae Nuclei towards the Galactic Bulge. I. Sample Discovery, Period Distribution and Binary Fraction
• The Interaction of Stellar Objects within a Common Envelope
• Isolated vs. Common Envelope Dynamos in Planetary Nebula Progenitors
• A Chandra Search for Coronal X Rays from the Cool White Dwarf GD 356

Cited by in corpus (33)

• On the alpha formalism for the common envelope interaction
• A Radio-Selected Black Hole X-ray Binary Candidate in the Milky Way Globular Cluster M62
• The Chandra X-ray Survey of Planetary Nebulae (ChanPlaNS): Probing Binarity, Magnetic Fields, and Wind Collisions
• Companion-launched jets and their effect on the dynamics of common envelope interaction simulations
• The Chandra Planetary Nebulae Survey (ChanPlaNS): III. X-ray Emission from the Central Stars of Planetary Nebulae
• Analysis of Far-UV Data of Central Stars of Planetary Nebulae: Occurrence and Variability of Stellar Winds
• A carbon dwarf wearing a Necklace: first proof of accretion in a post-common-envelope binary central star of a planetary nebula with jets
• The Chandra Planetary Nebula Survey (ChanPlaNS). II. X-ray Emission from Compact Planetary Nebulae
• The first low-mass black hole X-ray binary identified in quiescence outside of a globular cluster
• Binary central stars of planetary nebulae with long orbits: the radial velocity orbit of BD+33.2642 (PN G052.7+50.7) and the orbital motion of HD112313 (PN LoTr5)
• SALT reveals the barium central star of the planetary nebula Hen 2-39
• Stellar wind models of subluminous hot stars
• Two rings but no fellowship: LoTr 1 and its relation to planetary nebulae possessing barium central stars
• K 1-6: an asymmetric planetary nebula with a binary central star
• Searching for X-ray emission from AGB stars
• Radio sources in the Chandra Galactic Bulge survey
• SALT HRS discovery of a long period double-degenerate binary in the planetary nebula NGC 1360
• The physical structure of planetary nebulae around sdO stars: Abell36, DeHt2, and RWT152
• Physical Structure of the Planetary Nebula NGC 3242 from the Hot Bubble to the Nebular Envelope
• The deceleration of nebular shells in evolved planetary nebulae
• Binary Central Stars of Planetary Nebulae Discovered Through Photometric Variability III: The Central Star of Abell 65
• A new look inside Planetary Nebula LoTr 5: A long-period binary with hints of a possible third component
• Stellar wind models of central stars of planetary nebulae
• Detection of a multi-shell planetary nebula around the hot subdwarf O-type star 2MASS J19310888+4324577
• Constraints on the Surface Magnetic Fields and Age of a Cool Hypergiant: XMM-Newton X-ray Observations of VY CMa
• Variable Hard X-ray Emission From the Central Star of the Eskimo Nebula
• Hot bubbles of planetary nebulae with hydrogen-deficient winds - II. Analytical approximations with application to BD+30${}^{\circ }$3639
• Chandra observations of the planetary nebula IC 4593
• A carbon-rich hot bubble in the planetary nebula NGC 5189
• Surface magnetic activity of the fast-rotating G5-giant IN Comae, central star of the faint planetary nebula LoTr 5
• A Chandra Study: Are Dwarf Carbon Stars Spun Up and Rejuvenated by Mass Transfer?
• A Binary Scenario for the Formation of Strongly Magnetized White Dwarfs
• Planetary Nebulae in the eROSITA eRASS1 catalog