Hot Stars

Life with Circumstellar Matter

Almaty, Kazakhstan, July 19-24, 2020

Conference e-mail:

First Announcement

First Announcement

All stars except the least massive ones spend a part of their lives having a hot photosphere (OBA spectral type). This condition favors a stronger mass loss from the stellar surface. Also, more massive stars tend to form in multiple-body systems, whose evolution often leads to mass exchange. A noticeable amount of circumstellar material exists in evolutionary phases ranging from the earliest to the latest stages. Circumstellar matter can alter the observable properties of the underlying objects, but it also adds imprints to the observational data that allow us to investigate the entire system and eventually reveal its intrinsic properties.

The advent of high-resolution observing techniques, long-term monitoring programs of individual objects, and frequent all-sky surveys are making more comprehensive studies of the nature and properties of a wider variety of objects possible. Results of these studies, coupled with an in creasing accuracy and volume of the GAIA distance measurements, lead to improving our understanding of stellar evolution and unveiling new phenomena. A timely exchange of new findings within the hot-star community is important for increasing current research efficiency, establishing new collaborations, and generating ideas for new research projects.

We will organize an international conference with the main focus on hot stars showing effects of the presence of circumstellar material such as spectral line emission, excess radiation in the visual and infrared regions, stellar spectrum veiling, nebulocities, brightness and spectrum variations. The classes of object include pre-main-sequence Herbig Ae/Be stars, Be stars, objects with the B[e] phenomenon, hot supergiants, Wolf-Rayet stars, Luminous Blue Variables, and planetary nebulae.

The conference will take place on July 19-24, 2020 in the city of Almaty, Kazakhstan, on campus of the Al-Farabi Kazakh National University. Almaty is located in foothills of the Tien-Shan mountains, which reach heights up to 5000 meters in the vicinity of the city. It is an astronomical site featuring the Fesenkov Astrophysical Institute and three nearby observatories located at elevations from 1500 to 2800 meters above the sea level.