Circumstellar Matter in Hot Star Systems

Dear Colleagues,

The Special Issue contains the papers of the international conference "Hot Stars—Life with Circumstellar Matter” (https://conf.astrokaznu.kz/), which took place on October 14−19, 2024, in the city of Almaty, Kazakhstan, on the campus of the Al-Farabi Kazakh National University.

The conference focused on stellar objects at any evolutionary stage, including early-type stars with signs of circumstellar gaseous and dusty material. This definition includes classes of objects such as Herbig Ae/Be, classical Be, Vega-type, Wolf–Rayet stars, proto-planetary nebulae, luminous blue variables, other objects containing the B[e] phenomenon, and more. The exploration of the evolutionary connections between the mentioned classes has led to a better understanding of the interaction between stellar systems and circumstellar matter and, ultimately, of the long-term evolution of galaxies.

This Special Issue aims to inform a broad audience of recent results in the field of the evolution of intermediate-mass and massive stars. As we analyze the information from large-scale and long-term surveys, as well as from recent space missions such as Gaia, new objects that belong to these classes are constantly being discovered and better constraints are being placed on the properties of individual objects and their groups. New data analysis methods and the application of existing methods to various datasets are advancing our knowledge of this exciting research field.

In particular, new data on the variability of Be stars has led to new insights on the mechanisms of the formation and structure of their disks; recent discoveries and long-term studies of objects containing the B[e] phenomenon and post-AGB binaries resulted in new hypotheses about their nature and evolutionary details; other results, from star formation to interstellar mediums, will be presented too.

This Special Issue will be of interest to specialists working in various fields of astrophysics, such as in the evolution of stars and galaxies, interacting binary systems, radiation transfer, dynamics and the evolution of circumstellar matter, and large-scale surveys of astronomical objects.

There is no maximum length, and the suggested minimum is approx. 4000 words. Submitted papers should contain enough novel content (except for reviews, which are acceptable from senior contributors). Please note that the three paper types recommended for this Special Issue are Article, Review, and Communication (limited number). For more details, including the various article types, please visit the following link: https://www.mdpi.com/about/article_types.

Prof. Dr. Anatoly Miroshnichenko
Dr. Sergei Zharikov
Dr. Serik Khokhlov
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Galaxies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• circumstellar matter
• binary stars
• pre-main-sequence stars
• post-AGB stars
• Be stars
• B[e] phenomenon
• mass loss
• mass transfer
• observations
• theory