Context :

Aims : The purpose of the present study is to research the origin of planetary companions by using a precise radial velocity ( RV ) survey .

Methods : The high-resolution spectroscopy of the fiber-fed Bohyunsan Observatory Echelle Spectrograph ( BOES ) at Bohyunsan Optical Astronomy Observatory ( BOAO ) is used from September 2008 to June 2012 .

Results : We report the detection of two exoplanets in orbit around HD 208527 and HD 220074 exhibiting periodic variations in RV of 875.5 \pm 5.8 and 672.1 \pm 3.7 days .
The RV variations are not apparently related to the surface inhomogeneities and a Keplerian motion of the planetary companion is the most likely explanation .
Assuming possible stellar masses of 1.6 \pm 0.4 and 1.2 \pm 0.3 M _ { \odot } , we obtain the minimum masses for the exoplanets of 9.9 \pm 1.7 and 11.1 \pm 1.8 \it M _ { \mathrm { Jup } } around HD 208527 and HD 220074 with an orbital semi-major axis of 2.1 \pm 0.2 and 1.6 \pm 0.1 AU and an eccentricity of 0.08 and 0.14 , respectively .
We also find that the previously known spectral classification of HD 208527 and HD 220074 was in error : Our new estimation of stellar parameters suggest that both HD 208527 and HD 220074 are M giants .
Therefore , HD 208527 and HD 220074 are so far the first candidate M giants to harbor a planetary companion .

Conclusions :