The Central Star of Planetary Nebula PHR 1315-6555 and its host Galactic Open Cluster AL 1

Vasiliki Fragkou; Q. A. Parker; Albert Zijlstra; R. Shaw; F. Lykou

The Central Star of Planetary Nebula PHR 1315-6555 and its host Galactic Open Cluster AL 1

Vasiliki Fragkou, Q. A. Parker, Albert Zijlstra, R. Shaw, F. Lykou

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Abstract

PHR 1315-6555 is a rare case of a Galactic Planetary Nebula that is a proven member of the Open Cluster AL 1. This allows its distance to be defined with precision and thus the accurate measurement of its physical characteristics along with the parameters of its Central Star (CS). In this work we use HST to detect this unique CS and constrain the cluster’s physical parameters. Our results suggest that the cluster rests at a distance of 12 kpc, is highly reddened, and has an age of around 0.66 Gyrs and a turn-off mass of 2.2 M. Our deep Colour Magnitude Diagram (CMD) suggests that the metallicity of the cluster is subsolar (Z=0.006). Our photometric measurements indicate that the PN’s core is a faint blue star close to the nebular apparent centre, with an observed dereddened visual VEGA magnitude of 21.82 0.60. A significant contribution from any possible binary companion is unlikely but possible. Our results show that the CS has an effective Zanstra temperature of around 113 kK
and a mass of 0.58M providing a unique additional point to the fundamental White Dwarf Initial-to-Final-Mass Relation.

Original language	English
Journal	Monthly Notices of the Royal Astronomical Society
Publication status	Accepted/In press - 9 Jan 2019

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title = "The Central Star of Planetary Nebula PHR 1315-6555 and its host Galactic Open Cluster AL 1",

abstract = "PHR 1315-6555 is a rare case of a Galactic Planetary Nebula that is a proven member of the Open Cluster AL 1. This allows its distance to be defined with precision and thus the accurate measurement of its physical characteristics along with the parameters of its Central Star (CS). In this work we use HST to detect this unique CS and constrain the cluster{\textquoteright}s physical parameters. Our results suggest that the cluster rests at a distance of 12 kpc, is highly reddened, and has an age of around 0.66 Gyrs and a turn-off mass of 2.2 M. Our deep Colour Magnitude Diagram (CMD) suggests that the metallicity of the cluster is subsolar (Z=0.006). Our photometric measurements indicate that the PN{\textquoteright}s core is a faint blue star close to the nebular apparent centre, with an observed dereddened visual VEGA magnitude of 21.82 0.60. A significant contribution from any possible binary companion is unlikely but possible. Our results show that the CS has an effective Zanstra temperature of around 113 kKand a mass of 0.58M providing a unique additional point to the fundamental White Dwarf Initial-to-Final-Mass Relation.",

author = "Vasiliki Fragkou and Parker, {Q. A.} and Albert Zijlstra and R. Shaw and F. Lykou",

year = "2019",

month = jan,

day = "9",

language = "English",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "1365-2966",

publisher = "Oxford University Press",

}

TY - JOUR

T1 - The Central Star of Planetary Nebula PHR 1315-6555 and its host Galactic Open Cluster AL 1

AU - Fragkou, Vasiliki

AU - Parker, Q. A.

AU - Zijlstra, Albert

AU - Shaw, R.

AU - Lykou, F.

PY - 2019/1/9

Y1 - 2019/1/9

N2 - PHR 1315-6555 is a rare case of a Galactic Planetary Nebula that is a proven member of the Open Cluster AL 1. This allows its distance to be defined with precision and thus the accurate measurement of its physical characteristics along with the parameters of its Central Star (CS). In this work we use HST to detect this unique CS and constrain the cluster’s physical parameters. Our results suggest that the cluster rests at a distance of 12 kpc, is highly reddened, and has an age of around 0.66 Gyrs and a turn-off mass of 2.2 M. Our deep Colour Magnitude Diagram (CMD) suggests that the metallicity of the cluster is subsolar (Z=0.006). Our photometric measurements indicate that the PN’s core is a faint blue star close to the nebular apparent centre, with an observed dereddened visual VEGA magnitude of 21.82 0.60. A significant contribution from any possible binary companion is unlikely but possible. Our results show that the CS has an effective Zanstra temperature of around 113 kKand a mass of 0.58M providing a unique additional point to the fundamental White Dwarf Initial-to-Final-Mass Relation.

AB - PHR 1315-6555 is a rare case of a Galactic Planetary Nebula that is a proven member of the Open Cluster AL 1. This allows its distance to be defined with precision and thus the accurate measurement of its physical characteristics along with the parameters of its Central Star (CS). In this work we use HST to detect this unique CS and constrain the cluster’s physical parameters. Our results suggest that the cluster rests at a distance of 12 kpc, is highly reddened, and has an age of around 0.66 Gyrs and a turn-off mass of 2.2 M. Our deep Colour Magnitude Diagram (CMD) suggests that the metallicity of the cluster is subsolar (Z=0.006). Our photometric measurements indicate that the PN’s core is a faint blue star close to the nebular apparent centre, with an observed dereddened visual VEGA magnitude of 21.82 0.60. A significant contribution from any possible binary companion is unlikely but possible. Our results show that the CS has an effective Zanstra temperature of around 113 kKand a mass of 0.58M providing a unique additional point to the fundamental White Dwarf Initial-to-Final-Mass Relation.

M3 - Article

SN - 1365-2966

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

ER -

The Central Star of Planetary Nebula PHR 1315-6555 and its host Galactic Open Cluster AL 1

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