SIMBAD references

2024ApJ...972..145E - Astrophys. J., 972, 145 (2024/September-2)

The Orbit and Mass of the Cepheid AW Per.

EVANS N.R., GALLENNE A., KERVELLA P., MERAND A., MONNIER J., ANDERSON R.I., GUNTHER H.M., PROFFITT C., WINSTON E.M., PIETRZYNSKI G., GIEREN W., KURASZKIEWICZ J., ANUGU N., ROETTENBACHER R.M., LANTHERMANN C., GUTIERREZ M., SCHAEFER G., SETTERHOLM B.R., IBRAHIM N. and KRAUS S.

Abstract (from CDS):

The Cepheid AW Per is a component in a multiple system with a long-period orbit. The radial velocities of Griffin cover the 38 yr orbit well. An extensive program of interferometry with the Center for High Angular Resolution Astronomy array is reported here, from which the long-period orbit is determined. In addition, a Hubble Space Telescope high-resolution spectrum in the ultraviolet demonstrates that the companion is itself a binary with nearly equal-mass components. These data combined with a distance from Gaia provide a mass of the Cepheid (primary) of M1 = 6.79 ± 0.85 M⊙. The combined mass of the secondary is MS = 8.79 ± 0.50 M⊙. The accuracy of the mass will be improved after the fourth Gaia data release, expected in approximately two years.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Cepheid variable stars - Multiple stars - Stellar masses - Stellar evolution

Simbad objects: 15

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