The Components of Cepheid Systems: The FN Vel System

Nancy Remage Evans; Pierre Kervella; Joanna Kuraszkiewicz; H. Moritz Günther; Richard I. Anderson; Charles Proffitt; Alexandre Gallenne; Antoine Mérand; Boris Trahin; Giordano Viviani; Shreeya Shetye

doi:10.3847/1538-3881/ad7fea

The Astronomical Journal (Jan 2024)

The Components of Cepheid Systems: The FN Vel System

Nancy Remage Evans,
Pierre Kervella,
Joanna Kuraszkiewicz,
H. Moritz Günther,
Richard I. Anderson,
Charles Proffitt,
Alexandre Gallenne,
Antoine Mérand,
Boris Trahin,
Giordano Viviani,
Shreeya Shetye

Affiliations

Nancy Remage Evans: ORCiD; Smithsonian Astrophysical Observatory , MS 4, 60 Garden St., Cambridge, MA 02138, USA ; [email protected]
Pierre Kervella: ORCiD; LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université , Université de Paris, 5 Place Jules Janssen, 92195 Meudon, France
Joanna Kuraszkiewicz: ORCiD; Smithsonian Astrophysical Observatory , MS 67, 60 Garden St., Cambridge, MA 02138, USA ; [email protected]
H. Moritz Günther: ORCiD; Massachusetts Institute of Technology, Kavli Institute for Astrophysics and Space Research , 77 Massachusetts Ave., NE83-569, Cambridge, MA 02139, USA
Richard I. Anderson: ORCiD; Institute of Physics , École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, Chemin Pegasi 51B, 1290 Versoix, Switzerland
Charles Proffitt: ORCiD; Space Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USA
Alexandre Gallenne: ORCiD; Instituto de Astrofísica, Departamento de Ciencias Físicas, Facultad de Ciencias Exactas, Universidad Andrés Bello , Fernández Concha 700, Las Condes, Santiago, Chile and French-Chilean Laboratory for Astronomy, IRL 3386, CNRS, Casilla 36-D, Santiago, Chile
Antoine Mérand: ORCiD; European Southern Observatory , Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
Boris Trahin: LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université , Université de Paris, 5 Place Jules Janssen, 92195 Meudon, France
Giordano Viviani: Institute of Physics , École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, Chemin Pegasi 51B, 1290 Versoix, Switzerland
Shreeya Shetye: Institute of Physics , École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, Chemin Pegasi 51B, 1290 Versoix, Switzerland and Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven, 3001, Belgium

DOI: https://doi.org/10.3847/1538-3881/ad7fea
Journal volume & issue: Vol. 168, no. 5
p. 221

Abstract

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Cepheid masses continue to be important tests of evolutionary tracks for intermediate-mass stars as well as important predictors of their future fate. For systems where the secondary is a B star, Hubble Space Telescope ultraviolet spectra have been obtained. From these spectra a temperature can be derived, and from this a mass of the companion M _2 . Once Gaia DR4 is available, proper motions can be used to determine the inclination of the orbit. Combining mass of the companion, M _2 , the mass function from the ground-based orbit of the Cepheid and the inclination produces the mass of the Cepheid, M _1 . The Cepheid system FN Vel is used here to demonstrate this approach and what limits can be put on the Cepheid mass for inclination between 50° and 130°.

Published in The Astronomical Journal

ISSN: 0004-6256 (Print); 1538-3881 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Astronomy
Website: https://iopscience.iop.org/journal/1538-3881

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