2019ApJS..241...35R


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.20CET01:34:07

2019ApJS..241...35R - Astrophys. J., Suppl. Ser., 241, 35-35 (2019/April-0)

The period-luminosity relations of red supergiants in M33 and M31.

REN Y., JIANG B.-W., YANG M. and GAO J.

Abstract (from CDS):

Based on previously selected preliminary samples of red supergiants (RSGs) in M33 and M31, the foreground stars and luminous asymptotic giant branch stars are further excluded, which leads to the samples of 717 RSGs in M33 and 420 RSGs in M31. With the time-series data from the Intermediate Palomar Transient Factory survey spanning nearly 2000 days, the period and amplitude of RSGs are analyzed. According to the light-curve characteristics, they are classified into four categories in which 84 and 56 objects in M33 and M31, respectively, are semi-regular variables. For these semi-regular variables, the pulsation mode is identified by comparing with the theoretical model, which yielded 19 (7) sources in the first overtone mode in M33 (M31), and the other 65 (49) RSGs in M33 (M31) in the fundamental mode. The period-luminosity (P-L) relation is analyzed for the RSGs in the fundamental mode. The P-L relation is found to be tight in the infrared, i.e., the Two Mircon All-Sky Survey (2MASS) JHKS bands and the short-wavelength bands of Spitzer. Meanwhile, the inhomogeneous extinction causes the P-L relation scattering in the V band, and the dust emission causes the less tight P-L relation in the Spitzer/[8.0] and [24] bands. The derived P-L relations in the 2MASS/KS band are in agreement with those of RSGs in the Small Magellanic Cloud, the Large Magellanic Cloud, and the Milky Way within the uncertainty range. It is found that the number ratio of RSGs pulsating in the fundamental mode to the first overtone mode increases with metallicity.

Abstract Copyright: © 2019. The American Astronomical Society.

Journal keyword(s): stars: late-type - stars: oscillations including pulsations - supergiants

Simbad objects: 8

goto Full paper

goto View the reference in ADS

Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [MSL2009] J004115.35+405025.2 s*r 00 41 15.3399543457 +40 50 24.852844985 22.798 21.204 19.210 18.332 17.540 K1I 4 0
2 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10585 1
3 2MASS J00441542+4134089 s*r 00 44 15.43 +41 34 09.0 21.649 21.535 19.540 18.526 17.612 K2I 7 0
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9111 1
5 2MASS J01323744+3018335 s*r 01 32 37.4387265828 +30 18 33.702354899 20.9 19.82 18.21 17.50 16.9 ~ 3 0
6 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5027 1
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14349 1
8 NAME Local Group GrG ~ ~           ~ 6681 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2019ApJS..241...35R and select 'bookmark this link' or equivalent in the popup menu


2019.11.20-01:34:07

© Université de Strasbourg/CNRS

    • Contact