Many of Australia's top brokers have been busy adjusting their financial models and recommendations again. This has led to the release of a number of broker notes this week.

Three ASX shares that brokers have named as buys this week are listed below. Here's why their analysts are feeling bullish on them right now:

Mineral Resources Ltd (ASX: MIN)

According to a note out of Morgans, its analysts have upgraded this mining and mining services company's shares to an add rating with an improved price target of $23.00. This follows the release of a quarterly update with production in line with expectations and costs better than expected. Morgans was also pleased to see that the Onslow Haul Road upgrade is progressing well and should be complete later this year. This is expected to underpin a strong increase in production. Overall, the broker has lifted its earnings estimates and valuation, leading to an upgrade in its recommendation. The Mineral Resources share price is trading at $20.47 on Wednesday.

Northern Star Resources Ltd (ASX: NST)

A note out of Goldman Sachs reveals that its analysts have retained their buy rating on this gold miner's shares with a trimmed price target of $22.10. Goldman notes that Northern Star's production fell short of expectations during the third quarter due to the KCGM operation. However, its cash costs were broadly in line with Goldman's estimates, though higher than consensus. Nevertheless, the broker remains very positive on the gold miner, highlighting its production growth as reasons to buy. Goldman points out that the expanded KCGM operations and other asset growth are taking group production toward ~2Mozpa from ~2027-29+ (and up to ~2.6Moz with the acquisition of DEG). The Northern Star share price is fetching $19.11 at the time of writing.

Treasury Wine Estates Ltd (ASX: TWE)

Analysts at UBS have retained their buy rating and $14.00 price target on this wine giant's shares. According to the note, the broker is feeling positive about the company's outlook. This is due largely to accelerating demand for its luxury wine in China and the company's ongoing premiumisation strategy. In respect to the former, the broker highlights that export data shows that wine demand in China is very strong and Treasury Wine is reaping the benefits. Though, it concedes that it is supply constrained at present and cannot take full advantage. Overall, it believes the company is well-placed for solid earnings growth in the coming years, making now a good time to buy. The Treasury Wine share price is trading at $8.93 this afternoon.