Spatial Distributions of Multiple Dust Components in the PPN/PN Dust Shells [PDF]
, 2000 We investigate spatial distributions of specific dust components in the circumstellar shells of a proto-planetary nebula candidate, HD 179821, and a planetary nebula, BD$+30^{\circ}$3639, by means of spectral imaging.
Dayal, Aditya +7 more
core +3 more sources
THE CHANDRA PLANETARY NEBULA SURVEY (ChanPlaNS). III. X-RAY EMISSION FROM THE CENTRAL STARS OF PLANETARY NEBULAE [PDF]
, 2014 We present X-ray spectral analysis of 20 point-like X-ray sources detected in Chandra Planetary Nebula Survey observations of 59 planetary nebulae (PNe) in the solar neighborhood.
R. Montez +28 more
semanticscholar +1 more source
Irradiation Investigation: Exploring the Molecular Gas in NGC 7293
Galaxies, 2020 Background: Many planetary nebulae retain significant quantities of molecular gas and dust despite their signature hostile radiation environments and energetic shocks.
Jesse Bublitz +7 more
doaj +1 more source
Lessons from the Ionised and Molecular Mass of Post-CE PNe
Galaxies, 2022 Close binary evolution is widely invoked to explain the formation of axisymmetric planetary nebulae after a brief common envelope phase. The evolution of the primary would be interrupted abruptly, its still quite massive envelope being fully ejected to ...
Miguel Santander-García +4 more
doaj +1 more source
Herschel spectral-mapping of the Helix Nebula (NGC 7293): Extended CO photodissociation and OH+ emission [PDF]
, 2014 The Helix Nebula (NGC 7293) is the closest planetary nebulae. Therefore, it is an ideal template for photochemical studies at small spatial scales in planetary nebulae. We aim to study the spatial distribution of the atomic and the molecular gas, and the
Barlow, M. J. +15 more
core +2 more sources
The post-common-envelope, binary central star of the planetary nebula Hen 2-11 [PDF]
, 2014 We present a detailed photometric study of the central star system of the planetary nebula Hen 2-11, selected for study because of its low-ionisation filaments and bipolar morphology – traits which have been strongly linked with central star binarity ...
David Jones +5 more
semanticscholar +1 more source
Spectral analysis of the binary nucleus of the planetary nebula Hen 2-428 – first results
Open Astronomy, 2018 Identifying progenitor systems for the double-degenerate scenario is crucial to check the reliability of type Ia supernovae as cosmological standard candles. Santander-Garcia et al. (2015) claimed that Hen 2-428 has a doubledegenerate core whose combined
Finch Nicolle L. +6 more
doaj +1 more source
The Herschel Planetary Nebula Survey (HerPlaNS) - I. Data overview and analysis demonstration with NGC 6781 [PDF]
, 2014 Context. This is the first of a series of investigations into far-IR characteristics of 11 planetary nebulae (PNe) under the Herschel Space Observatory open time 1 program, Herschel Planetary Nebula Survey (HerPlaNS). Aims.
T. Ueta +32 more
semanticscholar +1 more source
Three Stages in Evolution of the Object Th4-4
GalaxiesThe results of observations of the object Th4-4 in 1970–2024 showed that during this period the object went through several stages, when its characteristics corresponded to different classes of objects: Be star, symbiotic star and planetary nebula ...
Lyudmila Kondratyeva +5 more
doaj +1 more source
Spectroscopy of Planetary Nebulae with Herschel: A Beginners Guide
Galaxies, 2018 A brief overview of the Herschel Space Telescope PACS and SPIRE spectrographs is given, pointing out aspects of working with the data products that should be considered by anyone using them.
Katrina Exter
doaj +1 more source