TY - JOUR
T1 - Pulsation modes of long-period variables in the period-luminosity plane
AU - Soszyński, I.
AU - Wood, P. R.
AU - Udalski, A.
PY - 2013/12/20
Y1 - 2013/12/20
N2 - We present a phenomenological analysis of long-period variables (LPVs) in the Large Magellanic Cloud with the aim of detecting pulsation modes associated with different period-luminosity (PL) relations. Among brighter LPVs, we discover a group of triple-mode semi-regular variables with the fundamental, first-overtone, and second-overtone modes simultaneously excited, which fall on PL sequences C, C′, and B, respectively. The mode identification in the fainter red giants is more complicated. We demonstrate that the fundamental-mode pulsators partly overlap with the first-overtone modes. We show a possible range of fundamental mode and first overtone periods in the PL diagram.
AB - We present a phenomenological analysis of long-period variables (LPVs) in the Large Magellanic Cloud with the aim of detecting pulsation modes associated with different period-luminosity (PL) relations. Among brighter LPVs, we discover a group of triple-mode semi-regular variables with the fundamental, first-overtone, and second-overtone modes simultaneously excited, which fall on PL sequences C, C′, and B, respectively. The mode identification in the fainter red giants is more complicated. We demonstrate that the fundamental-mode pulsators partly overlap with the first-overtone modes. We show a possible range of fundamental mode and first overtone periods in the PL diagram.
KW - infrared: stars
KW - stars: AGB and post-AGB
KW - stars: late-type
KW - stars: oscillations (including pulsations)
UR - http://www.scopus.com/inward/record.url?scp=84889793427&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/779/2/167
DO - 10.1088/0004-637X/779/2/167
M3 - Article
SN - 0004-637X
VL - 779
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 167
ER -