We obtained deep imaging and high-resolution spectroscopy of the planetary nebula NGC 2438. In addition to the bright inner rim and the faint halo-like shell...
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PublicaciónA hydrodynamical study of multiple-shell planetaries . I. NGC 2438
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PublicaciónA hydrodynamical study of multiple-shell planetary nebulae. III. Expansion properties and internal kinematics: Theory versus observation
We present the result of a study on the expansion properties and internal kinematics of round/elliptical planetary nebulae of the Milky Way disk, the halo, and...
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PublicaciónA multiwavelength study of LS II+34 26: a hot post-AGB star in the process of becoming a planetary nebula.
We present the results from a multiwavelength analysis of LS II+34 26, recently identified as a low mass post-AGB star and not a massive population I B-type...
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PublicaciónA near infrared survey of northern planetary nebulae
We have observed 77 evolved planetary nebulae in the J, H, K, L', and M photometric bands. As a consequence, we note that most PN fall into a range -0.6 < (J-H)...
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PublicaciónA new look inside planetary nebula LoTr 5: a long-period binary with hints of a possible third component
LoTr 5 is a planetary nebula with an unusual long-period binary central star. As far as we know, the pair consists of a rapidly rotating G-type star and a hot...
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PublicaciónA new proto-planetary nebula
Low and high resolution spectra of IRAS 22568 + 6141 have been obtained. Physical parameters and abundances and flux densities are given for the object. The...
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PublicaciónA new, evolved bipolar planetary nebula.
Optical imaging and spectroscopy reveal that the ionised region No.252 in the list of Marsalkowa (1974Ap&SS..27....3M), whose photograph is presented in the `...
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PublicaciónA pile of new Planetary Nebulae in the Galactic Plane
The INT photometric H-alpha Survey (IPHAS; http://www.iphas.org) is now near completion. A band of 10 degrees along the Northern Galactic Plane is being imaged...
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PublicaciónA Precessing Collimated Outflow in the Quadrupolar Planetary Nebula NGC 6881
We present high-quality (subarcsecond) optical narrowband CCD images of the planetary nebula NGC 6881, which reveal a highly collimated bipolar structure. A...