The possibility of recovery of the vertical distribution of the magnetic field in umbrae by line width differences S.G. Mozharovsky Ussuriysk Astrophysical Observatory of FEB RAS, Ussuriysk, Russia sw@newmail.ru Abstract. This article studies the possibility of recovery of the vertical distribution of the magnetic field in the photospheric layers of sunspot umbra by the Difference of the Line profile Absolute Widths of neutral zirconium ? ... 2) Line profiles for cold models have extended wings. ...
The Second U.S. Naval Observatory CCD Astrograph Catalog ( UCAC2 ) Table of Contents 1) Introduction 2) Summary of the Project a) Observations and Instrumentation b) Reductions of UCAC Observations c) Computation of Proper Motions 3) Properties of the Catalog and Important Notes For the User a) Sky Coverage b) Completeness c) Positions, Proper Motions and Error Calculations d) UCAC2 Magnitudes e) 2MASS Photometry f) Non-stellar ... All stars in the UCAC2 have proper motions. ...
. 23 декабря 2013 . Отношение масса-радиус для 63 планет с радиусами меньше 4 радиусов Земли . Хотя в Солнечной системе нет планет с радиусами между 1 и 3.8 радиусов Земли, в Галактике планеты таких размеров широко распространены. По данным, полученным космическим телескопом им. Кеплера, примерно 24% звезд имеют планеты с радиусами от 1 до 4 земных и с периодами от 5 до 50 земных суток. Естественно возникает вопрос: каковы свойства этих планет? Где проходит граница между малыми гигантами вроде Урана и
... 000, 113 (2010) Printed 21 September 2011 A (MN L TEX style file v2.2) A universal ultraviolet-optical colourcolourmagnitude relation of galaxies I1gor V. Chilingarian1,2, and Ivan Yu. ... Received 2011 Sep 15; in original form 2011 Feb 6 ABSTRACT The bimodal galaxy distribution in the optical colourmagnitude diagram (CMD) comprises a narrow "red sequence" populated mostly by early-type galaxies and a broad "blue cloud" dominated by star-forming systems. ...