Serendipity and the SDSS: Discovery of the Largest Known Planetary Nebula on the Sky
نویسندگان
چکیده
Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK Department of Astronomy, University of Minnesota, 116 Church Street, SE, Minneapolis, MN 55455 Division of Astronomical Sciences, National Science Foundation, Room 1045, 4201 Wilson Blvd, Arlington, VA 22230 European Southern Observatory, Alonso de Cordoba 3107, Vitacura, Casilla 19001, Santiago 19, Chile Current address: Department of Physics & Astronomy, University of Victoria, PO Box 3055 STN CSC, Victoria, BC, V8W 3P6 Canada Astrophysics Group, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, UK
منابع مشابه
On the discovery of an enormous ionized halo around the hot DO white dwarf PG 1034 + 001
Very recently, the discovery of the largest known planetary nebula on the sky surrounding the DO white dwarf PG 1034+001 with an apparent diameter of about 2 • , corresponding to a linear diameter of 3.5-7.0 pc at the likely distance of 100-200 pc, has been reported by Hewett et al. (2003). A careful inspection of available sky survey data has now shown that this planetary nebula, Hewett 1, is ...
متن کاملExplaining the Concept and Models of Serendipity In Information Search Process
Background and Aim: Searching for information is not always a targeted activity; it can also be done involuntarily. The serendipity has the ability to find information randomly and as something happy, something unexpected, or a pleasant surprise. This paper examines and analyzes the concept of serendipity and its models in the process of information searching. Methods: The present study uses a ...
متن کاملمدلی برای ساختار دینامیکی و یونیدگی سحابی سیاره نمای (418 IC)
The interacting two winds model and a spherical density distribution function are introduced to study the dynamical and ionization structure of the planetary nebula IC 418. A fast wind with a mechanical luminousity 2/34×1034erg.s-1 of interacts with a super wind with a mass-loss rate of 2×10-5M(°)yr-1 and a velocity of 10 , and produces a dense and luminous medium. In this model, the exp...
متن کاملPlanetary nebula or symbiotic Mira ? Near infrared colours mark the difference ?
Nebulae around symbiotic Miras look very much like genuine planetary nebulae, although they are formed in a slightly different way. We present near infrared photometry of known and suspected symbiotic nebulae obtained with the Deep Near Infrared Southern Sky Survey (DENIS). We demonstrate that the near infrared colours are an excellent tool to distinguish symbiotic from genuine planetary nebula...
متن کاملWebo 1: a Young Barium Star Surrounded by a Ring-like Planetary Nebula
WeBo 1 (PN G135.6+01.0), a previously unrecognized planetary nebula with a remarkable thinring morphology, was discovered serendipitously on Digitized Sky Survey images. The central star is found to be a late-type giant with overabundances of carbon and s-process elements. The giant is chromospherically active and photometrically variable, with a probable period of 4.7 days; this suggests that ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003