New homogeneous iron abundances of double-mode Cepheids from high-resolution echelle spectroscopy

Details New homogeneous iron abundances of double-mode Cepheids from high-resolution echelle spectroscopy New homogeneous iron abundances of double-mode Cepheids from high-resolution echelle spectroscopy

2007-07-17

arxiv.org/abs/0707.2530v1

Astronomy and Astrophysics

Astrophysics

10 pages, 7 figures, accepted in A&A

Scientific paper

10.1051/0004-6361:20077539

Aims: We define the relationship between the double-mode pulsation of Cepheids and metallicity in a more accurate way, determine the empirical metallicities of double-mode Cepheids from homogeneous, high-resolution spectroscopic data, and study of the period-ratio -- metallicity dependence. Methods: The high S/N echelle spectra obtained with the FEROS spectrograph were analyzed using a self-developed IRAF script, and the iron abundances were determined by comparing with synthetic spectra assuming LTE. Results: Accurate [Fe/H] values of 17 galactic beat Cepheids were determined. All these stars have solar or slightly subsolar metallicity. Their period ratio P1/P0 shows strong correlation with their derived [Fe/H] values. The corresponding period ratio -- metallicity relation has been evaluated.

Affiliated with

Also associated with

No associations

Rating

New homogeneous iron abundances of double-mode Cepheids from high-resolution echelle spectroscopy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with New homogeneous iron abundances of double-mode Cepheids from high-resolution echelle spectroscopy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New homogeneous iron abundances of double-mode Cepheids from high-resolution echelle spectroscopy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-562983