# New Galactic multi-mode Cepheids from the ASAS-SN Survey

## TL;DR

This paper reports the discovery of 15 new multi-mode Cepheids in the Galactic disk using the ASAS-SN survey, significantly expanding the known population and providing new insights into stellar pulsation modes.

## Contribution

It presents the first systematic search for multi-mode Cepheids in the Galactic disk, identifying new triple-mode pulsators previously only found in other galaxies.

## Key findings

- Discovered 13 double-mode and 2 triple-mode Cepheids in the Galactic disk.
- Increased the known Galactic disk multi-mode Cepheids by 33%.
- Identified triple-mode Cepheids pulsating in fundamental and overtone modes.

## 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.