Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Hugo E. Schwarz"'
Autor:
Hugo E. Schwarz, Hektor Monteiro
Publikováno v:
Exacta. 4:281-288
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2807d6683b66313aaafae8e4f58aae48
https://doi.org/10.5585/exactaep.v4i2.756
https://doi.org/10.5585/exactaep.v4i2.756
Publikováno v:
The Astrophysical Journal. 675:380-388
We show that the inclination to the line of sight of bipolar planetary nebulae strongly affects some of their observed properties. We model these objects as having a dusty equatorial density enhancement that produces extinction that varies with the v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eac314f2f5a56ce7ecde1ca8d30d39d3
https://doi.org/10.1086/524094
https://doi.org/10.1086/524094
Autor:
Hugo E. Schwarz, Hektor Monteiro
Publikováno v:
The Astrophysical Journal. 648:430-434
Continuing our series of papers on the three-dimensional (3-D) structures of and accurate distances to Planetary Nebulae (PNe), we present our study of the planetary nebula NGC6781. For this object we construct a 3-D photoionization model and, using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5220a0a7f18c2424396ba676148c5c9
https://doi.org/10.1086/505904
https://doi.org/10.1086/505904
Autor:
Hektor Monteiro, Hugo E. Schwarz
Publikováno v:
Exacta, Vol 4, Iss 2, Pp 281-288 (2006)
Continuing our series of papers on the three-dimensional (3-D) structures of and accurate distances to Planetary Nebulae (PNe), we present our study of the planetary nebula NGC6781. For this object we construct a 3-D photoionization model and, using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d592c1df7ec8896632859ae3331b6fc8
http://www.redalyc.org/articulo.oa?id=81040207
http://www.redalyc.org/articulo.oa?id=81040207
Publikováno v:
The Astrophysical Journal. 620:321-329
We present the results of a spatio-kinematic study of the planetary nebula Menzel 1 using spectro-photometric mapping and a 3-D photoionization code. We create several 2-D emission line images from our long-slit spectra, and use these to derive the l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31b438563acf3f8a660fa2b568105ac9
https://doi.org/10.1086/426809
https://doi.org/10.1086/426809
Publikováno v:
The Astrophysical Journal. 609:194-202
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fac3ac6388fec6e14440a64c12729bc
https://doi.org/10.1086/421038
https://doi.org/10.1086/421038
Autor:
Kjell Eriksson, Hans Olofsson, Tim Gledhill, Hugo E. Schwarz, Bengt Gustafsson, D. González Delgado
Publikováno v:
University of Hertfordshire
Imaging polarimetry has been used to study the extended, detached circumstellar shells around the bright carbon stars R Scl and U Ant. The observations were done in two narrow band filters centred on the resonance lines of neutral K and Na, but much
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d99ad249a4b899d26261a1c712e4791
https://doi.org/10.1051/0004-6361:20021596
https://doi.org/10.1051/0004-6361:20021596
Publikováno v:
The Astrophysical Journal. 553:211-218
New Hubble Space Telescope images and Cerro Tololo Inter-American Observatory echelle spectra of the nebula around the symbiotic Mira Henize 2-104 are presented. The nebula consists of two nested hourglass-shaped structures and a collimated polar jet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5edf8203eb25fb651d735d6def06da30
https://doi.org/10.1086/320665
https://doi.org/10.1086/320665
Publikováno v:
The Astronomical Journal. 119:1339-1344
The planetary nebula M2-9 has drastically changed its shape since its discovery by Minkwoski. Although the outline of the nebula seems to be stationary, most of the knots and bright features (N1, N2, S1, and S2) have moved laterally from the west to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8d1269a107effdf4247ec0ee9d22dd0
https://doi.org/10.1086/301267
https://doi.org/10.1086/301267
Publikováno v:
Symposium - International Astronomical Union. 177:409-412
Circumstellar emission in the Na I and K I resonance lines has been detected from three carbon stars using high-resolution spectroscopy. Some properties of the circumstellar envelopes are discussed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8602baf1357b73ff8b8a7b01069f3241
https://doi.org/10.1017/s0074180900002679
https://doi.org/10.1017/s0074180900002679