• Houston-based Hart Energy Publishing LP, publisher of Oil and Gas Investor, Petroleum Finance Week and A&D Watch, has been formed as the result of a management buyout backed by a Denver-based energy-investment group led by Wiegers Capital Management. The partners purchased the Hart Publications assets from VS&A Communications Partners, New York, a private-equity fund specializing in the media and communications industries. Compass Advisers LLP advised on the transaction and is an equity investor. J.P. Morgan Chase provided debt financing. • Riverstone Holdings and The Carlyle Group have raised a $1.1 billion buyout fund, Carlyle/Riverstone Global Energy & Power Fund II LP, for investment in the midstream, upstream, power and oilfield-service sectors. Already, nearly half the fund has been committed to seven investments. The portfolio includes Legend Natural Gas LP, a U.S. gas producer; CDM Resource Management Ltd., a U.S. gas-compression services company; Magellan Midstream Partners LP, a U.S. energy transportation, storage and distribution company, acquired with Madison Dearborn; Mariner Energy Inc., a U.S. producer; Glenmoor Acquisition Corp., pending closing of an acquisition of the Buckeye Pipeline Partners LP general partner; and Capital C, a U.S.-based producer, pending closing.