K 648, the planetary nebula in the globular cluster M15
نویسندگان
چکیده
منابع مشابه
Neutron-capture Elements in the Metal-poor Globular Cluster M15
We report on observations of six giants in the globular cluster M15 (NGC 7078) using the Subaru Telescope to measure neutron-capture elemental abundances. Our abundance analyses based on high-quality blue spectra confirm the star-to-star scatter in the abundances of heavy neutron-capture elements (e.g., Eu), and no significant s-process contribution to them, as was found in previous studies. We...
متن کاملA peculiar planetary nebula candidate in a globular cluster in the Fornax dwarf spheroidal galaxy
Context. Until now, only one planetary nebula (PN) has been known in the Fornax dwarf spheroidal galaxy. Aims. The discovery of a second PN candidate, associated with one of the 5 globular clusters in the Fornax dwarf, is reported. Methods. Spectra of the globular cluster H5, obtained with the UVES echelle spectrograph on the ESO Very Large Telescope, show [O ] line emission at a radial velo...
متن کاملThe Discovery of a Very Faint X-ray Transient in the Globular Cluster M15
We have identified an X-ray transient (hereafter M15 X-3) in the globular cluster M15 from an archival Chandra grating observation. M15 X-3 appears at an X-ray luminosity of 6 × 10 ergs s with a spectrum consistent with an absorbed power law of photon index 1.51±0.14. The object is identifiable in archival Chandra HRC-I observations with an X-ray luminosity of 2− 6× 10 ergs s and apparently sof...
متن کاملA study of the planetary nebula K 3 - 82
In this paper we present Fabry-Pérot high resolution spectroscopy in Hα, Hβ, [O iii], and [N ii], optical low resolution spectroscopy spanning the usable range 4700–6800 Å, along with a broad band direct image in Gunn-red for the planetary nebula (PN) K3-82. K3-82 turned out to be highly symmetrical, seen most probably edge-on. Two point-symmetrical knots appear in the light of Gunn-red. These ...
متن کاملThe Planetary Nebula Luminosity Function
The [O III] λ5007 planetary nebula luminosity function (PNLF) occupies an important place on the extragalactic distance ladder: it is the only standard candle that can be applied to all the large galaxies of the Local Supercluster. We review the method’s precision, and use it to show that the distance scale defined by Cepheids and the Surface Brightness Fluctuation method is likely too large by...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1984
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/207.3.471