Two Interesting Southern Objects

Gyulbudaghian, A. L.

doi:10.1007/s10511-016-9431-z

Cited by 2 publications

(1 citation statement)

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“…For the stars satisfying Q<-0.10 criterion, that was imposed in (Comeron et al, 2005) as a threshold, defining the stars suspected to display IR excess. Hence we can conclude, that it is possible to find YSO's, using the values of J-H and H-K. By Gyulbudaghian (2011Gyulbudaghian ( , 2014Gyulbudaghian ( , 2016 many new YSO's were found, using such values. Houk and Fesen (1978) using the Michigan Spectral Catalogue (where the data of good quality determined spectral classes are collected), was constructed the Hertzsprung-Russell diagram for 36382 stars (diagram M V /spectral class).…”

Section: Introductionmentioning

confidence: 78%

Color-Color Diagrams in Near Infrared: (J-H)/(H-K). I.

Gyulbudaghian

Baloian

Sánchez

2017

ComBAO

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In the paper are presented the color-color diagrams (J-H)/(H-K) for all stars with visible values B<11, for which in the known catalogs the values of J, H, K, and also spectral classes and luminosity classes of these stars are given. The diagrams are constructed for luminosity classes Ia, Ib, II, III, IV, V. The similarity of diagrams for classes Ia and Ib (super giants) and II (giants), is obvious from these diagrams. The diagrams obtained by us can be used for discovering of new young stars and also for determining of color excesses of investigating stars. Maximal amounts of stars are registered in the classes V and III. There is a tendency of increasing of J-H and H-K along the sequence of spectral classes O – M, which is correct for all luminosity classes.

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