The discussion revolves around the cataloging of multiple star systems that host planets, specifically focusing on systems with three or more stars. Participants explore statistical properties of these systems, including the characteristics of the stars and the planets within them, as well as the implications of the findings on our understanding of stellar populations.
Participants express differing views on the classification of the Sun among main sequence stars, with some emphasizing its high mass status while others challenge the portrayal of the Sun as "average." The discussion remains unresolved regarding the implications of these statistics for broader astrophysical understanding.
Participants note limitations in the data, including the potential incompleteness of the star classifications and the challenges in verifying the statistics across the Milky Way.
ABSTRACT - We present a catalog (status July 1, 2022) of triple and higher order systemsidentified containing exoplanets based on data from the literature, including various analyses. We explore statistical properties of the systems with focuson both the stars and the planets. So far, about 30 triple systems and one to three quadruple systems, including (mildly) controversial cases, have been found. The total number of planets is close to 40. All planet-hosting triple star systems are highly hierarchic, consisting of a quasi-binary complemented by a distant stellar component, which is in orbit about the common center of mass. Furthermore, the quadruple systems are in fact pairs of close binaries ("double-doubles"), with one binary harboring a planet. For the different types of star-planet systems, we introduce a template for the classifications of planetary orbital configurations in correspondence to the hierarchy of the system and the planetary host. The data show that almost all stars are main-sequence stars, as expected. However, the stellar primaries tend to be more massive (i.e., corresponding to spectral types A, F, and G) than expected from single star statistics, a finding also valid for stellar secondaries but less pronounced. Tertiary stellar components are almost exclusively low-mass stars of spectral type M. Almost all planets have been discovered based oneither the Radial Velocity or the Transit method. Both gas giants (the dominant type) and terrestrial planets (including super-Earths) have been identified. We anticipate the expansion of this data base in the light of future planetary search missions.
"The data show that almost all stars are main-sequence stars, as expected. However, the stellar primaries tend to be more massive (i.e., corresponding to spectral types A, F, and G) than expected from single star statistics, a finding also valid for stellar secondaries but less pronounced. Tertiary stellar components are almost exclusively low-mass stars of spectral type M.
Certainly never reported like that in the media or pop sci.snorkack said:There is a point made with numbers, though these vary. Namely that Sun is a high mass star - it is pointed out that this is rarely stated.
The two statistics they quote are somewhat divergent and not specific to Sun, but Sun is in about top 5% of main sequence stars.
For something that can be analyzed, seepinball1970 said:Certainly never reported like that in the media or pop sci.
"Average star" Top 5% is not average.
EDIT: from wiki "Sun has an absolute magnitude of +4.83, estimated to be brighter than about 85% of the stars in the Milky Way, most of which are red dwarfs.[30][31] "