The brightest star in the Magellanic irregular galaxy DDO 155

Details The brightest star in the Magellanic irregular galaxy DDO 155 The brightest star in the Magellanic irregular galaxy DDO 155

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98.1282m&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Dec. 1986, p. 1282-1286.

Astronomy and Astrophysics

Astronomy

10

Dwarf Galaxies, Irregular Galaxies, Stellar Luminosity, Stellar Spectra, Subdwarf Stars, Distance, Radial Velocity, Stellar Evolution

Scientific paper

A spectrum has been obtained of the brightest star in the dwarf Magellanic irregular galaxy DDO 155. The heliocentric velocity of the star is V_sun; = -134±18 km s-1 which is 353 km s-1 less than the velocity of the galaxy, showing that it is a foreground star in the galaxy. The available evidence suggests that it is an early G-type metal-weak subdwarf, at a distance of 2.1±0.4 kpc in the galactic halo. The value of the distance modulus of DDO 155 based on three separate distance indicators is μ0 = 25.1 corresponding to a distance Δ = 1.05±0.1 Mpc, which is essentially unchanged from the previously adopted value.

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