||The Herschel Planetary Nebula Survey (HerPlaNS)
||464, Circumstellar Dynamics at High Resolution
||Ueta, T.; Ladjal, D.; HerPlaNS team
||The Herschel Planetary Nebula Survey (HerPlaNS, PI: T. Ueta) is one of the
largest Herschel Open Time 1 program in which we explore
the far-infrared aspects of 11 planetary nebulae (PNs) with the
Herschel Space Observatory, exploiting its unprecedented capabilities
in broadband photometry mapping, spectral mapping, and integral-field
(1) deep PACS/SPIRE broadband mapping to account for the coldest dust
component of the nebulae and determine the spatial distribution of the
dusty haloes in the target PNs,
(2) exhaustive PACS/SPIRE line mapping in far-IR atomic and molecular
lines in two representative PNs to diagnose the energetics of the
nebulae as a function of location in the nebulae, and
(3) PACS/SPIRE spectral-energy-distribution spectroscopy at several
positions in the target PNs to understand variations in the physical
conditions as a function of location in the nebulae,
to build a more complete picture of the interplay between the
dust and gas components as a function of location in the nebulae.
The HerPlaNS survey is distinguished from the existing guaranteed-time
Key Program (KPGT), “Mass Loss of Evolved StarS” (MESS, PI:
M. Groenewegen, including 10 PNs) by the extra dimension added by
integral-field spatio-spectroscopy that permit simultaneous probing of
the gas and dust component in the target PNs.
Through these investigations, we will consider the energetics of the
entire gas-dust system as a function of location in the
nebulae, which is a novel approach that has rarely been taken
HerPlaNS is conducted in collaboration with the
Chandra Planetary Survey (ChanPlaNS, PI: J.H. Kastner) to furnish
substantial PN data resources that would allow us—a community of PN
astronomers—to tackle a multitude of unanswered issues in PN physics,
from the shaping mechanisms of the nebulae to the energetics of the
multi-phased gas-dust system surrounding the central white dwarf.
These PN surveys, combined with
the community assets from optical to mid-IR, will provide an extremely
valuable and comprehensive compilation of PN resource that carries a
significant Legacy value.
In this contribution we will present the HerPlaNS program, its aim, the
adopted observing technics and the latest status of the data reduction.