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The hot massive luminous blue variables (LBVs) represent an importantevolutionary phase of massive stars. Here, we report the discovery of a new LBV-- LAMOST J0037+4016 in the distant outskirt of the Andromeda galaxy. It islocated in the south-western corner (a possible faint spiral arm) of M31 withan unexpectedly large projection distance of $\sim$ 22 kpc from the center. Theoptical light curve shows a 1.2 mag variation in $V$ band and its outburst andquiescence phases both last over several years. The observed spectra indicatean A-type supergiant at epoch close to the outburst phase and a hot B-typesupergiant with weak [Fe II] emission lines at epoch of much dimmer brightness.The near-infrared color-color diagram further shows it follows the distributionof Galactic and M31 LBVs rather than B[e] supergiants. All the existing datastrongly show that LAMOST J0037+4016 is an LBV. By spectral energy distributionfitting, we find it has a luminosity ($4.42 \pm 1.64$)$\times 10^5$ $L_{\odot}$and an initial mass $\sim 30$ $M_{\odot}$, indicating its nature of lessluminosity class of LBV.

A New Luminous blue variable in the outskirt of the Andromeda Galaxy