Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Krzysztof Gesicki"'
Publikováno v:
Smith, C, Zijlstra, A, Gesicki, K M & Dinerstein, H L 2017, ' Abundances in Galactic Bulge planetary nebulae from optical, ultraviolet and infrared observations ', Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/stx1720
Iron suffers from high levels of depletion in the highly ionized environments of planetary nebulae, making the direct determination of undepleted elemental iron abundances difficult. Zinc, which does not suffer from the same depletion effects as iron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c66efe78d75e39b3a255f20f198c6724
https://doi.org/10.1093/mnras/stx1720
https://doi.org/10.1093/mnras/stx1720
Publikováno v:
Gesicki, K, Zijlstra, A & Miller Bertolami, M M 2018, ' The mysterious age invariance of the planetary nebula luminosity function bright cut-off ', Nature Astronomy, vol. 2, no. 7, pp. 580-584 . https://doi.org/10.1038/s41550-018-0453-9
Planetary nebulae mark the end of the active life of 90% of all stars. They trace the transition from a red giant to a degenerate white dwarf. Stellar models predicted that only stars above approximately twice the solar mass could form a bright nebul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92d64654a5e633de9ec7cdf1b90b0ce1
http://www.nature.com/articles/s41550-018-0453-9
http://www.nature.com/articles/s41550-018-0453-9
Publikováno v:
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Universidad Nacional de La Plata
instacron:UNLP
Planetary nebulae form in stellar populations with ages from 1 to 10 Gyr, and can be used to trace their star formation histories. Here we apply this to the Galactic bulge, where there are indications both for an old origin and for younger stars. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72262a22cc6fd84498e6971975ebb5af
http://sedici.unlp.edu.ar/handle/10915/85907
http://sedici.unlp.edu.ar/handle/10915/85907
Autor:
Tom J. Millar, Roisin Níchuimín, Eric Lagadec, Lizette Guzman-Ramirez, Paul M. Woods, Albert A. Zijlstra, Krzysztof Gesicki
Publikováno v:
Proceedings of the International Astronomical Union. 7:259-262
Galactic bulge planetary nebulae show evidence of mixed chemistry with emission from both silicate dust and PAHs. This mixed chemistry is unlikely to be related to carbon dredge up, as third dredge-up is not expected to occur in the low mass bulge st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a512a49ecbc640cd715fba6bbcd6d684
https://doi.org/10.1017/s1743921312011052
https://doi.org/10.1017/s1743921312011052
Autor:
Paul M. Woods, Albert A. Zijlstra, Eric Lagadec, Tom J. Millar, R. Ni Chuimin, Lizette Guzman-Ramirez, Krzysztof Gesicki
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 414:1667-1678
Galactic Bulge Planetary Nebulae show evidence of mixed chemistry with emission from both silicate dust and PAHs. This mixed chemistry is unlikely to be related to carbon dredge up, as third dredge-up is not expected to occur in the low mass Bulge st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d56cf8a71adc108fdfc191ae83021f4e
https://doi.org/10.1111/j.1365-2966.2011.18502.x
https://doi.org/10.1111/j.1365-2966.2011.18502.x
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 406:626-633
A sample of 33 {[}WR] and wels (weak emission-line central stars) central stars of planetary nebulae was observed in order to search for binary nuclei. One close binary system was discovered. The central star of PN G222.8 - 04.2 is the first {[}WR] s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a5249e5cd31402367e7aa9473101c62
https://doi.org/10.1111/j.1365-2966.2010.16704.x
https://doi.org/10.1111/j.1365-2966.2010.16704.x
Publikováno v:
Astronomy & Astrophysics. 490:L7-L10
We study the post-AGB central star of the (bipolar) Galactic bulge planetary nebula M 2-29. We have obtained additional HST imaging and SAAO spectroscopy of the object. The star showed a pronounced, long-lasting occultation with subsequent recovery.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f5ebc476c709b6410f290036693f06f
https://doi.org/10.1051/0004-6361:200810492
https://doi.org/10.1051/0004-6361:200810492
Autor:
Krzysztof Gesicki
Publikováno v:
EAS Publications Series. 28:37-40
The brightest and unstable stars occupying the upper right part of HR diagram are briefly introduced. Some examples of interferometric analysis are given together with derived conclusions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0153db67d0c2df70f3fdfc0838d7411
https://doi.org/10.1051/eas:0828006
https://doi.org/10.1051/eas:0828006
Autor:
Dante Minniti, Jeremy R. Walsh, Krzysztof Gesicki, Albert A. Zijlstra, P. A. M. van Hoof, D. Pequignot
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 369:875-890
The identification of two new Planetary Nebulae in the Sagittarius Dwarf Spheroidal Galaxy (Sgr) is presented. This brings the total number to four. The first, StWr 2-21, belongs to the main body of Sgr. The second, the halo PN BoBn 1, has a location
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3a7e18555f29927b4e48ab44687a1f6
https://doi.org/10.1111/j.1365-2966.2006.10338.x
https://doi.org/10.1111/j.1365-2966.2006.10338.x
Autor:
Krzysztof Gesicki
Publikováno v:
EAS Publications Series. 18:233-250
Emission line spectra of planetary nebulae are computed and compared to the observations. This allows for a derivation of the kinematical data concerning specific nebulae as well as for general conclusions concerning stellar evolution.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87778bbcda3feacf1d21b77192b63166
https://doi.org/10.1051/eas:2006015
https://doi.org/10.1051/eas:2006015