'subgiant' can also refer to...



On the thick-disc exoplanet host subgiant HD 155358

Herschel observations of debris discs orbiting planet-hosting subgiants

Local subgiants and time-scales of disc formation

Chemical abundances in the multiple sub-giant branch of 47 Tucanae: insights on its faint sub-giant branch component

The isotopic mixture of barium in the metal-poor subgiant HD 140283

Spectroscopic Study on the Atmospheric Parameters of Nearby F–K Dwarfs and Subgiants

Erratum: Spectroscopic Study on the Atmospheric Parameters of Nearby F–K Dwarfs and Subgiants

The extremely low-metallicity star SDSS J102915+172927: a subgiant scenario

Three-dimensional simulations of the upper radiation–convection transition layer in subgiant stars

Evolutionary constraints on the planet-hosting subgiant ε Reticulum from its white dwarf companion

Investigating the spectroscopic, magnetic and circumstellar variability of the O9 subgiant star HD 57682

The C+N+O abundances and the splitting of the subgiant branch in the globular cluster NGC 1851

Chemical Composition of Carbon-Rich, Very Metal-Poor Subgiant LP 625-44 Observed with the Subaru/HDS

Spectroscopic Determination of Stellar Atmospheric Parameters: Application to Mid-F through Early-K Dwarfs and Subgiants

The tight subgiant branch of the intermediate-age star cluster NGC 411 implies a single-aged stellar population

Spatially resolved images of dust belt(s) around the planet-hosting subgiant κ CrB

On the interpretation of sub-giant branch morphologies of intermediate-age star clusters with extended main sequence turnoffs


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A star that has exhausted the hydrogen at its centre and is evolving into a giant. They are of luminosity class IV. The subgiants we see are usually less massive than the Sun, because more massive stars move very quickly through this stage into giants. Low-mass stars take many billions of years to evolve this far, so low-mass subgiants are very old. A subgiant branch on the Hertzsprung–Russell diagram, linking the main sequence to the giant branch, is therefore found only for old clusters such as globular clusters.

Subjects: Astronomy and Astrophysics.

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