Read e-book online B[e] Stars: Proceedings of the Paris Workshop held from 9–12 PDF

By D. De Winter, M. E. Van Den Ancker, M. R. Pérez (auth.), Anne Marie Hubert, Carlos Jaschek (eds.)

ISBN-10: 9048150809

ISBN-13: 9789048150809

ISBN-10: 9401590141

ISBN-13: 9789401590143

The concept of getting a gathering got here to the Editors whilst engaged on numerous points of galactic Be and B[e] stars. they discovered common precis of the houses of B[e] stars used to be lacking, in order that the organiza­ tion of a primary assembly on those gadgets seemed as very priceless. B[e] stars have hydrogen line emission and forbidden [Fe eleven] and [0 I] emission strains of their spectra; also they are characterised through a robust IR extra as a result of circumstellar airborne dirt and dust. Having a large number of extinction within the UV and the visible they've been much less usually saw than different emission line gadgets. even though approximately 100 galactic items were categorised as B[e], purely fif­ teenager or so were studied in a few aspect. in addition to this, the evolutionary prestige of those gadgets is rat her debatable, are they pre-main series or stars with a purpose to develop into nUclei of planetary nebulae? different tough difficulties look while contemplating the relatives of those stars with different comparable teams, like Herbig AeBe stars, Be, luminous blue variables and the superluminous B[e] stars saw within the Magellanic Clouds. The convention turns out well timed considering the fact that huge surveys like DENIS and 2Mass, plus new house and new tools for the micron, millimeter and cen­ timeter wavelength zone will lead to the invention of extra stars of this group.

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Extra resources for B[e] Stars: Proceedings of the Paris Workshop held from 9–12 June, 1997

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LAU Symp. 98, D. Reidel, Dordrecht, p. , 1990. In: Evolution in Astrophysics, Proc. Int. , Toulouse, ESA SP-310, p. , Shepherd D. et al. , 1994. In: The Nature and Evolutionary Status of Herbig Ae/Be Stars, eds. J. van den Heuvel, ASP Conference Sero Vol. 62, p. , Pottasch S. H. , 1989. In: Physics of Luminous BIue Variables, eds. K. J. M. Lamers, Kluwer Academic Publishers, Dordrecht, p. , 1996. In: Light curves of variable stars, eds. C. Sterken and C. R, 1970, Mem. R astr. Soc. , 1997. In: Luminous BIue Variables: Massive Stars in Transition; eds.

J . ~_ . _ _ _ _ - _ . :::~-~~~ .. = 6OM0·V" -~'--- ~I 'I WR STARS 1__1 4OM0 . · p - HD31628S • 0 - -- 0- - '. -- •••• ----- •• -- -- •• ----. : •. - - - - • -- . - - - - -. 6 log Teff Figure 1. HR diagram of galactic B[e] stars. ": B[e] stars;" 0": LBV stars; " x": cool hypergiants; solid lines: temperature-dependent luminosity limits. The location of WR stars is shown. 3. HR diagram of galactic stars with the B[e] phenomenon Using the parameters listed in Table 3, we obtained the HR diagram shown in Fig.

Although this sam pie still eontained a large variety of stellar types, they showed that stars with the B[e] phenomenon eonsidered in isolation share the Population I distribution. Dong & Hu (1991) listed all types of objeets with emission lines with eolours (v - [25]) 2: 8 mag, whieh also eontains almost all known B[e] stars. They showed that their distribution in galactie latitude is strongly eoneentrated towards the galactic plane and also that: (a) distribution in galactie longitude resembles that of WR stars, (b) it is higher in the direction of the Sagittarius-Carina arm.

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B[e] Stars: Proceedings of the Paris Workshop held from 9–12 June, 1997 by D. De Winter, M. E. Van Den Ancker, M. R. Pérez (auth.), Anne Marie Hubert, Carlos Jaschek (eds.)

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