Erratum: SALT HRS discovery of a long-period double-degenerate binary in the planetary nebula NGC 1360
نویسندگان
چکیده
منابع مشابه
The Discovery of a Short Period Double-degenerate Binary Star
We have found that the white dwarf PG 1101+364 is a double-lined white dwarf/white dwarf binary with an orbital period of 3:47 hours. PG 1101+364 is the shortest period detached double-degenerate yet found and gravitational radiation will cause it to merge in 2:5 10 9 years. PG 1101+364 has a mass ratio of 0:87 0:03. From the relative strengths of the narrow core of H, the lighter and therefore...
متن کاملThe tetra - lobed planetary nebula NGC 1501
Direct imagery and long-slit, spatially resolved echellograms of the high excitation planetary nebula NGC 1501 allowed us to study in detail the expansion velocity field, the physical conditions (electron temperature, electron density, ionization) and the spatial distribution of the nebular gas. An electron temperature of 11500 K and a turbulence of 18 km s−1 are derived by comparing the Hα and...
متن کاملA near - infrared study of the planetary nebula NGC 2346 ?
This paper presents new near-infrared observations of the planetary nebula NGC 2346. The data include a broad K– band image, an image in the H2 vibrationally excited 1–0S(1) line and K band slit spectra at three positions in the nebula. In the H2 1–0S(1) line, the nebula is characterized by a central, bright torus, surrounded by weaker emission with a typical butterfly shape, as seen in Hα and ...
متن کاملThe ISO spectrum of the planetary nebula NGC 6302
The spectrum of the planetary nebula NGC 6302 is presented, as it was observed by the ISO short-wavelength spectrometer. The IUE spectrum observed at the same position with the same aperture is also presented.
متن کاملAstronomy & Astrophysics Abundances in the planetary nebula NGC 6210
The spectra of the planetary nebula NGC 6210 is reanalysed using spectral measurements made in the mid-infrared with the Spitzer Space Telescope and the Infrared Space Observatory. The aim is to determine the chemical composition of this object. We also make use of IUE and ground based spectra. Abundances determined from the mid-infrared lines, which are insensitive to electron temperature, are...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2017
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stx2884