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The CoRoT short asteroseismic runs give us the opportunity to observe a largevariety of late-type stars through their solar-like oscillations. We report theobservation and modeling of the F5V star HD 175272. Our aim is to define amethod for extracting as much information as possible from a noisy oscillationspectrum. We followed a differential approach that consists of using awell-known star as a reference to characterize another star. We used classicaltools such as the envelope autocorrelation function to derive the globalseismic parameters of the star. We compared HD 175272 with HD 181420 through alinear approach, because they appear to be asteroseismic twins. The comparisonwith the reference star enables us to substantially enhance the scientificoutput for HD 175272. First, we determined its global characteristics through adetailed seismic analysis of HD 181420. Second, with our differential approach,we measured the difference of mass, radius and age between HD 175272 and HD181420. We have developed a general method able to derive asteroseismicconstraints on a star even in case of low-quality data. %This method is basedon the comparison to a star with common seismic and classical properties.Seismic data allow accurate measurements of radii and masses differencesbetween the two stars. This method can be applied to stars with interestingproperties but low signal-to-noise ratio oscillation spectrum, such as starshosting an exoplanet or members of a binary system.

Differential asteroseismic study of seismic twins observed by CoRoT; Comparison of HD 175272 with HD 181420