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Arlo U. Landolt

Arlo U. Landolt

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Arlo U. Landolt is an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

An astronomer is a scientist who studies celestial bodies such as planets, stars and galaxies.Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using...

. Landolt has worked principally in photometry
Photometry (astronomy)
Photometry is a technique of astronomy concerned with measuring the flux, or intensity of an astronomical object's electromagnetic radiation...

 and has published a number of widely used lists of standard stars. In 1995, he received the George van Biesbroeck Prize
George Van Biesbroeck Prize
The George Van Biesbroeck Prize is an award for long-term achievements in the field of astronomy. According to the American Astronomical Society awards website; "The Van Biesbroeck prize is normally awarded every two years and honors a living individual for long-term extraordinary or unselfish...

 from the American Astronomical Society
American Astronomical Society
The American Astronomical Society is an American society of professional astronomers and other interested individuals, headquartered in Washington, DC...

. Landolt was the first discoverer of a pulsating white dwarf
Pulsating white dwarf
A pulsating white dwarf is a white dwarf star whose luminosity varies due to non-radial gravity wave pulsations within itself. Known types of pulsating white dwarfs include DAV, or ZZ Ceti, stars, with hydrogen-dominated atmospheres and the spectral type DA, pp. 891, 895; DBV, or V777 Her,...

 when he observed in 1965 and 1966 that the luminosity
Luminosity is a measurement of brightness.-In photometry and color imaging:In photometry, luminosity is sometimes incorrectly used to refer to luminance, which is the density of luminous intensity in a given direction. The SI unit for luminance is candela per square metre.The luminosity function...

 of HL Tau 76
HL Tau 76
HL Tau 76 is a variable white dwarf star of the DAV type. It was observed by G. Haro and W. J. Luyten in 1961, and was the first variable white dwarf discovered when, in 1968, Arlo U. Landolt found that it varied in brightness with a period of approximately 749.5 seconds, or 12.5 minutes...

 varied with a period of approximately 12.5 minutes. The asteroid 15072 Landolt
15072 Landolt
15072 Landolt is a main-belt asteroid discovered on January 25, 1999 by P. M. Motl and W. R. Cooney, Jr. at Baton Rouge.- External links :*...

 is named after him.


Arlo Landolt graduated from Highland High School
Highland High School (Highland, Illinois)
Highland High School is located in Highland, Illinois and is part of Highland Community Unit School District 5 and is far inferior to Triad High School.-Profile:Highland High School12760 Troxler AvenueHighland, Illinois 62249phone: 654-7131...

 in 1952. He received his Ph.D. in 1962 from Indiana University
Indiana University
Indiana University is a multi-campus public university system in the state of Indiana, United States. Indiana University has a combined student body of more than 100,000 students, including approximately 42,000 students enrolled at the Indiana University Bloomington campus and approximately 37,000...


External links