Publications (33)
Carbon Abundances in the Small Magellanic Cloud Planetary Nebulae
T. -H. Lee, L. Stanghellini, R. A. Shaw +2
As an ongoing study of Magellanic Cloud PNe we have obtained UV spectra of 9 PNe in the SMC to measure their carbon abundances. The spectra have been acquired with ACS HRC/PR200L a…
The formation of fullerenes: clues from new C60, C70, and (possible) planar C24 detections in Magellanic Cloud Planetary Nebulae
D. A. Garcia-Hernandez, S. Iglesias-Groth, J. A. Acosta-Pulido +6
We present ten new Spitzer detections of fullerenes in Magellanic Cloud Planetary Nebulae, including the first extragalactic detections of the C70 molecule. These new fullerene det…
Carbon abundance in Small Magellanic Cloud planetary nebulae through Advanced Camera for Surveys prism spectroscopy: constraining stellar evolution at low metallicity
L. Stanghellini, T. -H. Lee, R. A. Shaw +2
We perform near ultraviolet ACS prism spectroscopy of 11 Small Magellanic Cloud (SMC) planetary nebulae (PNe) with the main aim of deriving the abundance of carbon. The analysis of…
The 12C/13C ratio in the Planetary Nebula NGC3242 from Hubble Space Telescope STIS observations
F. Palla, D. Galli, A. Marconi +2
We present high resolution HST ultraviolet spectroscopy of NGC3242, the only planetary nebula with a measured abundance of 3He. The Space Telescope Imaging Spectrograph (STIS) has…
High resolution spectra of bright central stars of bipolar planetary nebulae, and the question of magnetic shaping
T. -H. Lee, L. Stanghellini, L. Ferrario +1
We present ESO NTT high resolution echelle spectroscopy of the central stars (CSs) of eight southern bipolar planetary nebulae (PNe) selected for their asymmetry. Our aim was to de…
The nature of dust in compact Galactic planetary nebulae from Spitzer spectra
L. Stanghellini, D. A. Garcia-Hernandez, P. Garcia-Lario +5
We present the Spitzer/IRS spectra of 157 compact Galactic PNe. These young PNe provide insight on the effects of dust in early post-AGB evolution, before much of the dust is alter…
The planetary nebula NGC 3132 revisited: high definition 3D photoionization model
H. Monteiro, C. Mendes de Oliveira, P. Amram +6
We present a detailed 3D photoionization model of the planetary nebula NGC 3132, constrained by the latest observations. Using the MOCASSIN code, the model incorporates integrated…
3He in Planetary Nebulae: A Challenge to Stellar Evolution Models
D. Galli, L. Stanghellini, M. Tosi +1
The discrepancy between the observed abundances of 3He in the ISM and those predicted by stellar and galactic chemical evolution remains largely unexplained. In this paper, we atte…
Planetary Nebulae in the Small Magellanic Cloud
P. Ventura, L. Stanghellini, M. Di Criscienzo +2
We analyse the planetary nebulae (PNe) population of the Small Magellanic Cloud (SMC), based on evolutionary models of stars with metallicities in the range $10^{-3} \leq Z \leq 4\…
The evolution of Galactic planetary nebula progenitors through the comparison of their nebular abundances with AGB yields
P. Ventura, L. Stanghellini, F. Dell'Agli +1
We study the chemical abundances of a wide sample of 142 Galactic planetary nebulae (PNe) with good quality observations, for which the abundances have been derived more or less ho…
Planetary Nebulae of the Large Magellanic Cloud II: the connection with the progenitors' properties
P. Ventura, S. Tosi, D. A. GarcÃa-Hernández +6
The study of planetary nebulae (PNe) offers the opportunity of evaluating the efficiency of the dust production mechanism during the very late asymptotic giant branch (AGB) phases.…
Direct Abundance Maps and Radial Metallicity Gradients of two Galaxies at z~4-5 in the GARDEN Survey
L. Stanghellini, S. A. Kassin, C. Pacifici +26
We investigate galaxies in the GARDEN (Galaxies at All Redshifts Deciphered and Explained with the NIRSpec MSA) survey that exhibit auroral emission lines, enabling spatially resol…
Tracing the Galactic Disk with Planetary Nebulae using Gaia DR3
B. Bucciarelli, L. Stanghellini
We study the population of Galactic planetary Nebulae (PNe) and their central stars (CSs) through the analysis of their heliocentric distances and Galactic distribution. Distances…
Magellanic Cloud Planetary Nebulae: A Fresh Look at the Relations between Nebular and Stellar Evolution
L. Stanghellini, R. A. Shaw, J. C. Blades +1
Studies of the relationship between planetary nebula morphology and the evolution of the central stars has long suffered from uncertainties in distance determinations, and from the…
The Galactic structure and chemical evolution traced by the population of planetary nebulae
L. Stanghellini, M. Haywood
We use an extended and homogeneous data set of Galactic planetary nebulae (PNe) to study the metallicity gradients and the Galactic structure and evolution. The most up-to-date abu…
Hubble Space Telescope Images of Magellanic Cloud Planetary Nebulae: Data and Correlations across Morphological Classes
L. Stanghellini, J. C. Blades, S. J. Osmer +2
The morphology of planetary nebulae (PNe) provides an essential tool for understanding their origin and evolution, as it reflects both the dynamics of the gas ejected during the TP…
Filling Factors and Ionized Masses in Planetary Nebulae
F. R. Boffi, L. Stanghellini
We calculate filling factors () and ionized masses (M) for a total of 84 galactic and extragalactic planetary nebulae (PNe) at known distances. To do these…
Infrared Study of Fullerene Planetary Nebulae
D. A. Garcia-Hernandez, E. Villaver, P. Garcia-Lario +5
We present a study of 16 PNe where fullerenes have been detected in their Spitzer spectra. This large sample of objects offers an unique opportunity to test conditions of fullerene…
The Present and Future of Planetary Nebula Research. A White Paper by the IAU Planetary Nebula Working Group
K. B. Kwitter, R. H. Méndez, M. Peña +10
We present a summary of current research on planetary nebulae and their central stars, and related subjects such as atomic processes in ionized nebulae, AGB and post-AGB evolution.…
Spitzer Infrared Spectrograph Observations of Magellanic Cloud Planetary Nebulae: the nature of dust in low metallicity circumstellar ejecta
L. Stanghellini, P. Garcia-Lario, D. A. Garcia-Hernandez +5
We present 5 - 40 micron spectroscopy of 41 planetary nebulae (PNe) in the Magellanic Clouds, observed with the Infrared Spectrograph on board the Spitzer Space Telescope. The spec…
Space telescope Imaging Spectrograph ultraviolet spectra of LMC planetary nebulae. A study of carbon abundances and stellar evolution
L. Stanghellini, R. A. Shaw, D. Gilmore
We acquired spectra of 24 LMC PNe in the 1150--3000 Ã range in order to determine carbon and other ionic abundances. The sample more than doubles the number of LMC PNe with good qu…
Dust from evolved stars: a pilot analysis of the AGB to PN transition
F. Dell'Agli, S. Tosi, D. Kamath +5
We present a novel approach to address dust production by low- and intermediate-mass stars. We study the asymptotic giant branch (AGB) phase, during which the formation of dust tak…
The Morphological and Structural Classification of Planetary Nebulae
A. Manchado, E. Villaver, L. Stanghellini +1
We present a statistical analysis of a complete sample (255) of northern planetary nebulae (PNe). Our analysis is based on morphology as a main parameter. The major morphological c…
Infrastructure and Strategies for Time Domain and MMA and Follow-Up
B. W. Miller, L. Allen, E. Bellm +28
Time domain and multi-messenger astrophysics are growing and important modes of observational astronomy that will help define astrophysics in the 2020s. Significant effort is being…
Formation of fullerenes in H-containing Planetary Nebulae
D. A. Garcia-Hernandez, A. Manchado, P. Garcia-Lario +5
Hydrogen depleted environments are considered an essential requirement for the formation of fullerenes. The recent detection of C60 and C70 fullerenes in what was interpreted as th…
Spitzer Spectra of Magellanic Cloud PNe
L. Stanghellini, P. Garcia Lario, A. Manchado +4
Planetary nebulae (PNe) in the Magellanic Clouds (LMC, SMC) offer a unique opportunity to study both the population and evolution of low- and intermediate-mass stars in an environm…
Planetary Nebula Abundances and Morphology: Probing the Chemical Evolution of the Milky Way
L. Stanghellini, A. M. Guerrero, K. Cunha +2
This paper presents a homogeneous study of abundances in a sample of 79 northern galactic planetary nebulae whose morphological classes have been uniformly determined. Ionic abunda…
The Intergalactic Stellar Population from Mergers of Elliptical Galaxies with Dark Matter halos
A. C. Gonzalez-Garcia, L. Stanghellini, A. Manchado
We present simulations of dry-merger encounters between pairs of elliptical galaxies with dark matter halos. The aim of these simulations is to study the intergalactic stellar popu…
Measurements of 12C/13C ratio in planetary nebulae: implications on stellar and Galactic chemical evolution
F. Palla, R. Bachiller, L. Stanghellini +2
We present the results of a study aimed at determining the 12C/13C ratio in two samples of planetary nebulae (PNe) by means of millimeter wave observations of 12CO and 13CO. The fi…
Search for new pulsating O VI central stars of planetary nebulae
R. Silvotti, C. Bartolini, L. Stanghellini
A photoelectric monitoring program has been applied, during the last four years, to five central stars of planetary nebulae (PNNs) with strong O\,VI 3811--34 Ã \hspace{0.1mm}…
A test for asymptotic giant branch evolution theories: Planetary Nebulae in the Large Magellanic Cloud
P. Ventura, L. Stanghellini, F. Dell'Agli +2
We used a new generation of asymptotic giant branch (AGB) stellar models that include dust formation in the stellar winds to find the links between evolutionary models and the obse…
Metallicity gradients in Local Universe galaxies: time evolution and effects of radial migration
L. Magrini, L. Coccato, L. Stanghellini +2
Our knowledge of the shape of radial metallicity gradients in disc galaxies has recently improved. Conversely, the understanding of their time evolution is more complex, since it r…
Euclid preparation. XXVII. A UV-NIR spectral atlas of compact planetary nebulae for wavelength calibration
Euclid Collaboration, K. Paterson, M. Schirmer +201
The Euclid mission will conduct an extragalactic survey over 15000 deg of the extragalactic sky. The spectroscopic channel of the Near-Infrared Spectrometer and Photometer (NIS…