76 citations · 354 across the 23 of their papers we have counts for
23 papers
Ages and ZAMS spin distribution of stars in detached eclipsing binaries
T. Merle, W. Van Rensbergen, L. Siess +4
Benchmarking fundamental stellar properties is essential for calibrating evolutionary models and establishing empirical relationships between mass, radius, luminosity and related s…
Non-thermal radio emission in Sakurai's Object
Marcin Hajduk, Peter A. M. van Hoof, Albert A. Zijlstra +5
The very late thermal pulse (VLTP) affects the evolution of 20\% of 1--8\, stars, repeating the last phases of the red giant within a few years and leading t…
JWST observations of the Ring Nebula (NGC 6720): I. Imaging of the rings, globules, and arcs
R. Wesson, Mikako Matsuura, Albert A. Zijlstra +18
We present JWST images of the well-known planetary nebula NGC 6720 (the Ring Nebula), covering wavelengths from 1.6m to 25 m. The bright shell is strongly fragmented with som…
The heart of Sakurai's Object revealed by ALMA
Daniel Tafoya, Peter A. M. van Hoof, Jesus A. Toala +7
We present high angular-resolution observations of Sakurai's object using the Atacama Large Millimeter Array, shedding new light on its morpho-kinematical structure. The millimetre…
The messy death of a multiple star system and the resulting planetary nebula as observed by JWST
Orsola De Marco, Muhammad Akashi, Stavros Akras +66
Planetary nebulae (PNe), the ejected envelopes of red giant stars, provide us with a history of the last, mass-losing phases of 90 percent of stars initially more massive than the…
The binary and the disk: the beauty is found within NGC3132 with JWST
Raghvendra Sahai, Valentin Bujarrabal, Guillermo Quintana-Lacaci +4
The planetary nebula (PN) NGC3132 is a striking example of the dramatic but poorly understood, mass-loss phenomena that (1-8) Msun stars undergo during their death throes as they e…
Multi-technique investigation of the binary fraction among A-F type candidate hybrid variable stars discovered by Kepler
P. Lampens, Y. Frémat, L. Vermeylen +14
Hundreds of candidate hybrid pulsators of intermediate type A-F were revealed by the recent space missions. Hybrid pulsators allow to study the full stellar interiors, where p- and…
The very fast evolution of Sakurai's object
G. C. Van de Steene, P. A. M. van Hoof, S. Kimeswenger +5
V4334 Sgr (a.k.a. Sakurai's object) is the central star of an old planetary nebula that underwent a very late thermal pulse a few years before its discovery in 1996. We have been m…
Herschel observations of planetary nebulae
Griet C. Van de Steene
This article presents an overview of the published results for planetary nebulae based on images and spectroscopy from the PACS, SPIRE, and HIFI instruments on board the Herschel s…
The Very Fast Evolution of the VLTP Object V4334 Sgr
P. A. M. van Hoof, S. Kimeswenger, G. C. Van de Steene +3
V4334 Sgr (Sakurai's object) is an enigmatic evolved star that underwent a very late thermal pulse a few years before its discovery in 1996. It ejected a new, hydrogen-deficient ne…
Herschel spectral-mapping of the Helix Nebula (NGC 7293): Extended CO photodissociation and OH+ emission
M. Etxaluze, J. Cernicharo, J. R. Goicoechea +13
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 s…
Herschel/PACS observations of the 69 band of crystalline olivine around evolved stars
J. A. D. L. Blommaert, B. L. de Vries, L. B. F. M. Waters +15
We present 48 Herschel/PACS spectra of evolved stars in the wavelength range of 67-72 m. This wavelength range covers the 69 m band of crystalline olivine ($\text{Mg}_{2-2x}\…
Herschel SPIRE and PACS observations of the red supergiant VY CMa: analysis of the molecular line spectra
Mikako Matsuura, J. A. Yates, M. J. Barlow +10
We present an analysis of the far-infrared and submillimetre molecular emission line spectrum of the luminous M-supergiant VY CMa, observed with the SPIRE and PACS spectrometers ab…
Carbon Monoxide in the Cold Debris of Supernova 1987A
J. Kamenetzky, R. McCray, R. Indebetouw +27
We report spectroscopic and imaging observations of rotational transitions of cold CO and SiO in the ejecta of SN1987A, the first such emission detected in a supernova remnant. In…
Herschel observations of PNe in the MESS key program
P. A. M. van Hoof, M. J. Barlow, G. C. Van de Steene +10
In this paper we give a progress report on the Herschel imaging and spectroscopic observations of planetary nebulae that are carried out as part of the MESS guaranteed time key pro…
A Herschel study of Planetary Nebulae
G. C. Van de Steene, K. M. Exter, P. A. M. van Hoof +5
We present Herschel PACS and SPIRE images of the dust shells around the planetary nebulae NGC 650, NGC 6853, and NGC 6720, as well as images showing the dust temperature in their s…
Imaging Planetary Nebulae with Herschel-PACS and SPIRE
P. A. M. van Hoof, K. M. Exter, G. C. Van de Steene +25
In this paper we will discuss the images of Planetary Nebulae that have recently been obtained with PACS and SPIRE on board the Herschel satellite. This comprises results for NGC 6…
HST Snapshot Survey of Post-AGB Objects
N. Siodmiak, M. Meixner, T. Ueta +3
The results from a Hubble Space Telescope (HST) snapshot survey of post-AGB objects are shown. The aim of the survey is to complement existing HST images of PPN and to connect vari…
Radio Observations of New Galactic Bulge Planetary Nebulae
Griet C. Van de Steene, George H. Jacoby
We observed 64 newly identified galactic bulge planetary nebulae in the radio continuum at 3 and 6 cm with the Australia Telescope Compact Array. We present their radio images, pos…
Properties of post-AGB stars with IRAS colors typical of planetary nebulae
Griet C. Van de Steene, Peter A. M. van Hoof, Peter R. Wood
We have investigated the infrared properties of a sample of objects with IRAS colors typical of planetary nebulae. The selected objects have not yet evolved to the planetary nebula…
Properties of Dust Grains in Planetary Nebulae -- I. The Ionized Region of NGC 6445
P. A. M. van Hoof, G. C. Van de Steene, D. A. Beintema +3
In this paper we study new infrared spectra of the evolved planetary nebula NGC 6445 obtained with ISO. These data show that the thermal emission from the grains is very cool and h…
Photo-ionization modelling of planetary nebulae -- II. Galactic bulge nebulae, a comparison with literature results
P. A. M. van Hoof, G. C. Van de Steene
We have constructed photo-ionization models of five galactic bulge planetary nebulae using our automatic method which enables a fully self-consistent determination of the physical…
HE 3-1475 AND ITS JETS
M. Bobrowsky, A. A. Zijlstra, E. K. Grebel +5
We present spectra and high-resolution images taken with HST, the NTT, the VLA, and the MPIA/ESO 2.2m of the emission-line star He 3-1475 which we suggest is a post-AGB star. The s…