Measurement of the Distance and Proper Motions of the H2O Masers in the Young Planetary Nebula K 3-35

Abstract

In this paper we present the results of very long baseline interferometry (VLBI) ob- servations carried out with the VLBI Exploration of Radio Astrometry (VERA) array and the Very Long Baseline Array (VLBA) toward H2O masers in a young planetary nebula K 3-35. From the VERA observations we measured the annual parallax and proper mo- tion of a bright water maser spot in K 3-35. The resulting distance is D = 3.9+0.7 kpc. -0.5 This is the first time that the parallax of a planetary nebula is obtained by observations of its maser emission. On the other hand, the proper motion of K 3-35 as a whole was esti- mated to be μα = -3.34+/-0.10 mas yr-1, μδ = -5.93+/-0.07 mas yr-1. From these results we determined the position and velocity of K 3-35 in Galactic cylindrical coordinates: (R,θ,z) = (7.11+0.08-0.06 kpc, 27+/-5{\circ}, 140+25-18 pc) and (VR, Vθ, Vz) = (33+/-16, 233+/-11, 11+/-2) km s-1, respectively. Additionally, from our VLBA observations we measured the relative proper motions among the water maser spots located in the central region of the nebula, which have been proposed to be tracing a toroidal structure. The distribution and relative proper motions of the masers, compared with previous reported observed epochs, suggest that such structure could be totally destroyed within a few years, due to the action of high velocity winds and the expansion of the ionization front in the nebula.

17 pages, accepted for publication on PASJ

References in corpus (9)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• Preplanetary Nebulae: An HST Imaging Survey and a New Morphological Classification System
• VLBA determination of the distance to nearby star-forming regions I. The distance to T Tauri with 0.4% accuracy
• The spatio-kinematical structure and distance of the pre-planetary nebula IRAS 19134+2131
• IPHAS extinction distances to Planetary Nebulae
• The Motion of Water Masers in the Pre-Planetary Nebula IRAS 16342-3814
• Kinematics of the H2O masers at the centre of the PN K3-35
• Radio interferometric observations of candidate water-maser-emitting planetary nebulae
• Detection of HCO+ Emission toward the Planetary Nebula K 3-35

Cited by in corpus (13)

• The Hα surface brightness - radius relation: a robust statistical distance indicator for planetary nebulae
• Micro-Arcsecond Radio Astrometry
• The First VERA Astrometry Catalog
• Planetary Nebulae: Sources of Enlightenment
• New light on Galactic post-asymptotic giant branch stars. I. First distance catalogue
• Comparison of Gaia DR2 Parallaxes of Stars with VLBI Astrometry
• Annual Parallax Distance and Secular Motion of the Water Fountain Source IRAS 18286-0959
• Astrometry of OH/IR stars using 1612 MHz hydroxyl masers. I. Annual parallaxes of WX Psc and OH138.0+7.2
• The collimated outflows of the planetary nebula Hu1-2: proper motion and radial velocity measurements
• Vertical Distribution and Kinematics of Planetary Nebulae in the Milky Way
• Parameters of the Link between the Optical and Radio Frames from Gaia DR2 Data and VLBI Measurements
• The planetary nebula nature and properties of IRAS18197-1118
• On the Nature of the Protoplanetary Nebula OH\,231.8+4.2