Aubameyang’s assured 58th-minute strike was enough to secure a 1-0 victory in a tight encounter at a rain-soaked St James’ Park.
The game was played out in front of a crowd of 47,635, almost 5,000 below capacity, as some fans staged a boycott over owner Mike Ashley’s running of the club, and while the Magpies gave as good as they got for long periods – Jonjo Shelvey hit a post before the break – they struggled to create chances and were made to pay for it.
Arsenal boss Unai Emery largely kept his powder dry as summer signings Dani Ceballos, Nicolas Pepe and Gabriel Martinelli were introduced from the bench, but they headed home satisfied with a sixth win in seven visits to St James’ Park.
Both sides started with intent, the Gunners moving the ball confidently at the back and looking to find space for Aubameyang, while Newcastle debutant Joelinton put himself about up front, with Miguel Almiron probing behind him.
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Arsenal enjoyed the better of the possession but, with defences on top, keepers Martin Dubravka and Bernd Leno spent the first 15 minutes of the season as virtual spectators.
That changed within minutes after Almiron turned and broke swiftly before setting up Javier Manquillo to send a cross just over the head of Joelinton, who sent a glancing effort just wide after Matt Ritchie had recycled the ball.
Leno was saved by the frame of the goal after Shelvey’s deflected 20th-minute shot had eluded his outstretched arm, although Dubravka was relieved to see Henrikh Mkhitaryan sky his effort high over at the other end with Nacho Monreal causing problems down the left three minutes later.
Joelinton fired straight at Leno after barging his way through a flimsy looking Gunners rearguard as Newcastle warmed to their task, but Dubravka was called upon for the first time with 14 minutes of the first half remaining to beat away Aubameyang’s stinging drive at his near post.
Almiron cleared the crossbar with a speculative 39th-minute attempt from distance, but the sides remained locked together as the half-time whistle sounded.
The visitors almost forced the breakthrough when Granit Xhaka picked out Aubameyang with an astute pass, but Paul Dummett blocked the striker’s 52nd-minute shot and saw the ball loop up on to the roof of the net.