منابع مشابه
Nova Geminorum No. 2 as a Wolf-Rayet Star.
It has been known for many years that the spectrum of temporary stars or Novae develops in a later stage into a spectrum nearly identical with that of planetary nebulae. First observed in the case of Nova Aurigae of 1891, the same result has been found to hold for all of the temporary stars observed since that time, including the most important Nova of recent years, Nova Persei of 1901. The que...
متن کاملLong-term changes of the Be star OT Geminorum
We investigate the character of light variability of the bright Be star OT Gem. Two phases of the long-term light changes were distinguished: – a quiet phase which is characterized by mild light changes; and – an active phase in which the sudden increases of brightness up to 0. m 4 in V occur. During the active phases, a cyclic oscillation of brightness of a period between 70 and 80 days is pre...
متن کاملOptical spectroscopy of the dwarf nova U Geminorum
The dwarf nova U Gem is unique in having a direct measurement of the K-velocity of its white dwarf from HST spectra (K 1 = 107 ± 2 km s −1 , Long et al. 1999). We present high-resolution optical spectra of the dwarf nova U Gem in quiescence taken to test the accuracy to which the HST value can be recovered from optical data. We find that, even with data of very high signal-to-noise ratio on thi...
متن کاملRS news.pmd
s an eterng fshm an at he U ivrsity of A aam a I knew hat m y oder ster, a jnior at his tim e, w as a R ligous Sdies m aor, ut I ad no lue as to w at he stdied. B eause he old m e at he ad tken crses in Tetan B uhism nd he H erew B ile, I asum ed at R elious Sudes m aors id ll of teir crsew rk stdying deriptive iform ation aout he dierent regions at re fund thrghout he w orld. In oher w ods, I ...
متن کاملSelecting and Using RS-232, RS-422, and RS-485 Serial Data Standards - AN723
Three common serial data standards, RS-232, RS-422, and RS-485, are described by specification and electrical interface. Cable termination techniques, use of multiple loads, daisy-chaining of RS-232, conversion of RS-232 to RS-485, conversion of RS-485 to RS-232, and RS-232 port-powered RS-485 conversions are described.
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1912
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19121932408