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.

Show description

Read or Download B[e] Stars: Proceedings of the Paris Workshop held from 9–12 June, 1997 PDF

Similar nonfiction_10 books

Seed Germination, Ontogeny, and Shoot Growth by T. T. Kozlowski PDF

Seed Germination, Ontogeny, and Shoot development summary: Seed Germination, Ontogeny, and Shoot progress

Download e-book for iPad: New Trends and Developments in Vaccines by A. and Friedman, H. (eds.) Voller

It used to be lately that many physicians and biomedical scientists felt that the period of 'vaccines' for shielding mankind opposed to infectious disorder used to be coming to an finish. through the 1 940s and 50s the frequent use of newly built antibiotics and antimicrobial chemotherapeutic brokers recommended a brand new period in drugs, i.

Download e-book for kindle: The Future of the Defence Firm: New Challenges, New by Andrew Latham, Nicholas Hooper (auth.), Andrew Latham,

This ebook is th e results of a collaborative examine venture regarding the Centre for Defence and defense reports on the college of Manitoba (Canada) and the Centre for Defence Economics on the collage of York in England . maybe now not unusually, given its transatlantic origins, its lineage is a bit concerned.

R. Felix Geyer, Johannes van der Zouwen (auth.), R. Felix's Sociocybernetics: An actor-oriented social systems approach PDF

The fifteen papers comprising this ebook have been selected out of the sixty-one contributions to the Symposium and part on Social platforms held within the context of the Fourth foreign Congress of Cybernetics and platforms (Amsterdam, The Netherlands, 21-25 August, 1978). those papers, as­ sembled right here at the foundation in their topicality, intensity and originality, hide quite a lot of difficulties, starting from 'Societies and Turing machines' to 'Dialectics and catastrophe'.

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

Example text

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.

Download PDF sample

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.)


by Anthony
4.0

Rated 4.44 of 5 – based on 44 votes