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We present a catalogue of 62 polluted white dwarfs observed by the 9thLow-Resolution Data Release of the Large Sky Area Multi-Object FiberSpectroscopic Telescope (LAMOST LRS DR9v1; R$\approx$1,800) and the Early DataRelease 3 (EDR3) of the Gaia Mission. Among these stellar remnants, 30 are newdiscoveries with previously unknown traces of calcium pollution. To generateour catalogue, we used a database of 4,324 unique Gaia EDR3 white dwarfcandidates with LAMOST LRS DR9v1 observations, many of which have beenspectroscopically confirmed by other telescopes. For these stars, we developeda quantitative method to detect calcium absorption in their spectra between3,900-4,000$\mathring {\mathrm A}$, which we then validated through visualinspection and multiple literature cross-checks. Our catalogue provides theastrometric and photometric properties of the white dwarf candidates,incorporates supplementary data (e.g. Montreal White Dwarf Database, MWDD;PanSTARRS; the Hubble Space Telescope), and indicates the possibility ofcalcium pollution in their atmospheres. For our final sample of polluted whitedwarfs, we also determine the main atmospheric properties of 23 sources witheffective temperatures $T_{\rm eff}$$\leq$25,000K and no existing calciumabundances in the MWDD. Our analysis represents a first step towards measuringthe full atmospheric composition of these stars and learning about the bulkproperties of their accreted material. As we venture into the era of wide-fieldspectroscopic surveys, our work highlights the importance of combininglarge-scale databases for identifying and characterising new polluted whitedwarfs.

Detection and Preliminary Characterisation of Polluted White Dwarfs from Gaia EDR3 and LAMOST