the 12m ALMA antennas ranges from $\sim$69$''$ at 84 GHz to $\sim$50$''$ at 115.5 GHz. Additional observations were performed with the IRAM 30m telescope to recover the flux filtered out by the interferometer. Observations were centered on the position of the star, with coordinates J2000.0 R.A.=09$^{\rm h}$47$^{\rm m}$57446 and Dec.=13$^{\circ}$16$'$4386, according to the position of the $\lambda$ 1 mm continuum emission peak ([@cer2013] 2013). A thorough description of the spectral survey will be presented elsewhere (Cernicharo et al., in preparation). Here, we focus on the large-scale emission of carbon chains. For the emission lines studied here, data from the ALMA compact and extended configurations were merged, after continuum subtraction, with the short-spacings data obtained with IRAM 30m, providing an angular resolution of $\sim$1$''$.

![image](fig_map_polyynes){width="0.92\columnwidth"}

![image](fig_map_cyanopolyynes){width="0.92\columnwidth"}

There are several emission lines from carbon chains in the $\lambda~3$ mm ALMA spectrum of IRC+10216. In this article we focus on linear carbon chains of the families of polyynes and cyanopolyynes. With respect to polyynes, we concentrate on the radicals of increasing length C$_2$H, C$_4$H, and C$_6$H, which belong to a chemical series resulting from the addition of C$_2$ subunits. These radicals are chemical descendants of acetylene and the symmetric polyynes C$_4$H$_2$ and C$_6$H$_2$, 