New Galactic Multi-Mode Cepheids from the ASAS-SN Survey
Abstract
A systematic search for multi-mode Cepheids using the database of the ASAS-SN survey has led to the detection of thirteen new double-mode and two triple-mode Cepheids in the Galactic disk. These discoveries have increased the number of Galactic disk multi-mode Cepheids by 33%. One of the new triple-mode variables pulsates simultaneously in the fundamental and in the first and the second radial overtone modes and the other in the first three radial overtone modes. Overtone triple-mode Cepheids were identified only in the Galactic bulge and in the Large and Small Magellanic Clouds previously.
(During the preparation of this work, Udalski et al. (2018) announced the discovery of a large number of Cepheids, including numerous double-mode and one new triple-mode Cepheid in the OGLE Galactic disk fields. As the OGLE survey covers only a portion of the sky, besides performing observations with a dynamic range different to that of ASAS-SN, there will be very few common objects between the two samples, when the list of discoveries by Udalski et al. (2018) becomes available.)- Publication:
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Acta Astronomica
- Pub Date:
- December 2018
- DOI:
- 10.32023/0001-5237/68.4.2
- arXiv:
- arXiv:1812.01575
- Bibcode:
- 2018AcA....68..341J
- Keywords:
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- Stars: variables: Cepheids;
- Stars: oscillations;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- Accepted for publication in Acta Astronomica