back

forward

doi: 10.32023/0001-5237/68.4.2

Vol. 68 (2018), No. 4

pp. 341-350

New Galactic Multi-Mode Cepheids from the ASAS-SN Survey

J. Jurcsik¹, G. Hajdu^2,3,4 and M. Catelan^2,4,5
1Konkoly Observatory, H-1525 Budapest PO Box 67, Hungary
e-mail: jurcsik.johanna@gmail.com
²Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile
e-mail: ghajdu@astro.puc.cl
³Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, Mönchhof str. 12-14, D-69120 Heidelberg, Germany
⁴Instituto Milenio de Astrofísica, Santiago, Chile
⁵On sabbatical leave at the European Southern Observatory, Av. Alonso de Córdova 3107, 7630355 Vitacura, Santiago, Chile



Received: October 29, 2018


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.*

Key words: Stars: variables: Cepheids - Stars: oscillations

*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.

Full article text (PDF)

back

forward