First Results from the CHARA Array. II. A Description of the Instrument

The CHARA Array is a six 1-m telescope optical/IR interferometric array located on Mount Wilson California, designed and built by the Center for High Angular Resolution Astronomy of Georgia State University. In this paper we describe the main elements of the Array hardware and software control systems as well as the data reduction methods currently being used. Our plans for upgrades in the near future are also described

First Results from the CHARA Array. I. An Interferometric and Spectroscopic Study of the Fast Rotator alpha Leonis (Regulus)

We report on K-band interferometric observations of the bright, rapidly rotating star Regulus (type B7 V) made with the CHARA Array on Mount Wilson, California. Through a combination of interferometric and spectroscopic measurements, we have determined for Regulus the equatorial and polar diameters and temperatures, the rotational velocity and period, the inclination and position angle of the spin axis, and the gravity darkening coefficient. These first results from the CHARA Array provide the first interferometric measurement of gravity darkening in a rapidly rotating star and represent the first detection of gravity darkening in a star that is not a member of an eclipsing binary system.Comment: Accepted for publication in The Astrophysical Journal, 44 pages w/ 14 figure

The prevention of psychopathology in African Americans: An epidemiologic perspective

Although improving the mental health status of African Americans is an important goal, it is not clear that this can be accomplished by increasing access to professional services. Many have argued that stressful social conditions are the major cause of mental disorder in blacks and thus, psychopathology can be prevented by eliminating racism, oppression and poor economic conditions. This review argues that while the notion of primary prevention with African Americans should be taken seriously, there is still a need for more and better epidemiologic research. Three bodies of knowledge relevant to black mental health are addressed: 1) the need for an epidemiologic knowledge base for prevention; 2) coping capacity and vulnerability to stress; 3) risk factor identification. Findings from a national survey of adult African Americans are presented as an example of risk factor identification for the purpose of specifying targets for preventive interventions. The paper concludes that before the prevention of psychopathology in black populations can be achieved, a number of measurement, theoretical and policy issues must be addressed. Specific directions for future research are outlined.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/44304/1/10597_2004_Article_BF00752393.pd