While the National Hockey League was honoring one of Washington's right wings yesterday, the Capitals went out and secured another. The newest member of the hockey team is 27-year-old Chuck Arnason, obtained from the Minnesota North Stars in a conditional deal.

Tom Rowe, who scored four goals Saturday against St. Louis and added his 30th of the season Sunday in Detroit, was chosen NHL Player of the Week by a committee of the Professional Hockey Writers Association.

Rowe, born in Lynn, Mass., is the first native American to score 30 goals in the NHL. The previous single-season high for an American-born player was 25, shared by Cecil Dillon of the New York Rangers in 1934-35 and Gerry O'Flaherty of the Vancouver Canucks in 1974-75.

Arnason has spent this season at Oklahoma City of the Central League, after being swallowed by the Confusion when his Cleveland Barons merged with the North Starts. Arnason played with Montreal, Atlanta, Pittsburgh, Kansas City and Colorado befoer joining the Barons.

Drafted in the first round by the Canadiens in 1971, the 5-foot-10, 185-pound right-hand shot enjoyed his best season in 1974-75, when he scored 26 goals and 32 assists for Pittsburgh. He had 25 goals last year.

Arnason will be entering the option year of his contract in June and whether the Capitals must compensate Minnesota depends on whether they sign him at that time. General Manager Max McNab had explored several possibilw moves with the trading deadline set for midnight tonight.