Results 51 to 60 of about 205,774 (262)

s-process enrichment in the planetary nebula NGC 3918. Results from deep echelle spectrophotometry [PDF]

, 2014
(Abridged) The chemical content of the planetary nebula NGC 3918 is investigated through deep, high-resolution UVES at VLT spectrophotometric data. We identify and measure more than 750 emission lines, making ours one of the deepest spectra ever taken ...
J. Garc'ia-Rojas, S. Madonna, V. Luridiana, N. Sterling, C. M. Iac, Spain., Dep. Astrof'isica Ull, U. W. Georgia, Usa, Ia-Unam, Mexico.   +10 more
semanticscholar   +1 more source

Evidence for the Disruption of a Planetary System During the Formation of the Helix Nebula

The Astronomical Journal, 2022
The persistence of planetary systems after their host stars evolve into their post-main-sequence phase is poorly constrained by observations. Many young white dwarf systems exhibit infrared excess emission and/or spectral absorption lines associated with
Jonathan P. Marshall, Steve Ertel, Eric Birtcil, Eva Villaver, Francisca Kemper, Henri Boffin, Peter Scicluna, Devika Kamath   +7 more
doaj   +1 more source

Modelling SNR G1.9+0.3 as a Supernova inside a Planetary Nebula [PDF]

, 2014
Using 3D numerical hydrodynamical simulations we show that a type Ia supernova (SN Ia) explosion inside a planetary nebula (PN) can explain the observed shape of the G1.9+0.3 supernova remnant (SNR) and its X-ray morphology.
D. Tsebrenko, N. Soker
semanticscholar   +1 more source

THE EMISSION-LINE DUSTY OBJECT IRAS 07080+0605, A LESS-EVOLVED EXAMPLE OF THE RED RECTANGLE

Odessa Astronomical Publications, 2020
The all-sky survey conducted by the InfraRed Astronomical Satellite (IRAS) in the 1980’s discovered many objects with infrared excesses whose nature has not been explored until recently.
S A. Khokhlov, A. S. Miroshnichenko, S. V, Zharikov, N. Manset, O. V. Zakhozhay, I. O. Bilinskyi, K. N. Grankin, A. V. kusakin, C. T. Omarov, R. I, Kokumbaeva, I. V. Reva, D. Korcakova, I. A. Usenko, A. K. Kuratova   +13 more
doaj   +1 more source

The planetary nebula nature and properties of IRAS18197-1118

, 2014
IRAS18197-1118 is a stellar-like object that has been classified as a planetary nebula from its radio continuum emission and high [SIII]9532 to Paschen9 line intensity ratio, as derived from direct images.
Miranda, L. F., Pereira, C. B., Rodriguez, L. F., Vazquez, R.   +3 more
core   +1 more source

A Compact X-ray Source and Possible X-ray Jets within the Planetary Nebula Menzel 3 [PDF]

, 2003
We report the discovery, by the Chandra X-ray Observatory, of X-ray emission from the bipolar planetary nebula Menzel 3. In Chandra CCD imaging, Mz 3 displays hot (3-6x10^6 K) gas within its twin, coaxial bubbles of optical nebulosity, as well as a ...
Adam Frank, Bruce Balick, Eric G. Blackman, Garcia-Segura G., Guerrero M. A., Jingqiang Li, Joel H. Kastner, Kingsburgh R. L., Lopez J. A., Noam Soker, Saeqa D. Vrtlek   +10 more
core   +3 more sources

The planetary nebula IPHASXJ211420.0+434136 (Ou5): insights into common-envelope dynamical and chemical evolution [PDF]

, 2014
While analysing the images of the IPHAS (INT/WFC Photometric Hα Survey of the northern Galactic plane) survey, we noticed that the central star of the candidate planetary nebula IPHASXJ211420.0+434136 (also named Ou5) was clearly variable.
R. Corradi, P. Rodríguez-Gil, D. Jones, J. García-Rojas, A. Mampaso, D. García-Álvarez, T. Pursimo, T. Eenmae, T. Liimets, B. Miszalski   +9 more
semanticscholar   +1 more source

Close Binaries and the Abundance Discrepancy Problem in Planetary Nebulae

Galaxies, 2018
Motivated by the recent establishment of a connection between central star binarity and extreme abundance discrepancies in planetary nebulae, we have carried out a spectroscopic survey targeting planetary nebula with binary central stars and previously ...
R. Wesson, D. Jones, J. García-Rojas, H. M. J. Boffin, R. L. M. Corradi   +4 more
doaj   +1 more source

Spectroscopic confirmation of the planetary nebula nature of PM1-242, PM1-318 and PM1-333 and morphological analysis of the nebulae

, 2009
We present intermediate resolution long-slit spectra and narrow-band Halpha, [NII] and [OIII] images of PM1-242, PM318 and PM1-333, three IRAS sources classified as possible planetary nebulae.
Acker, Balick, Balick, Bloecker, Brocklehurst, C. B. Pereira, Condon, Corradi, Goldman, Guerrero, Henry, Kingsburgh, L. F. Miranda, M. A. Guerrero, Manchado, Miranda, Miranda, Miranda, Peimbert, Preite-Martínez, Sahai, Sahai, Seaton, Shaver, Stanghellini, Vázquez   +25 more
core   +1 more source

An HST Snapshot Survey of Proto-Planetary Nebulae Candidates: Two Types of Axisymmetric Reflection Nebulosities [PDF]

, 1999
We report the results from an optical imaging survey of proto-planetary nebula candidates using the HST. We exploited the high resolving power and wide dynamic range of HST and detected nebulosities in 21 of 27 sources.
Bakker E. J., Blocker T., Blommaert J. A. D. L., Bujarrabal V., Corradi R. L. M., Decin L., Dobashi K., Feast M. W., Garcia-Lario P., Garcia-Lario P., Geballe T. R., Gutler J., Hu J. Y., Hu J. Y., Hu J. Y., Iyengar K. V. K., Kahn F. D., Klochkova V. G., Le Bertre T., Likkel L., Lintel Hekkert P., Loup C., Manchado A., Margaret Meixner, Matthew Bobrowsky, Mellema G., Oudmaijer R. D., Parthasarathy M., Reddy B. E., Reddy B. E., Riera A., Schonberner D., Skinner C. J., Slijkhuis S., Smith V. V., Toshiya Ueta, Van der Veen W. E. C. J., Waelkens C., Waters L. B. F. M., Whitelock P. A., Zcs L.   +40 more
core   +4 more sources