Sergei Alexandrovich Zhevakin

{{Short description|Russian astronomer}}

{{Infobox scientist

|name = Sergei Alexandrovich Zhevakin

|image =

|birth_date = April 11, 1916

|birth_place = Moscow Imperial Russia

|death_date = February 21, 2001

|death_place = Nizhny Novgorod Russian Federation

|residence =

|citizenship = USSR, Russian Federation

|nationality = Russian

|ethnicity =

|field = Astronomy

|work_institutions = Radio Physics Institute, Gorky

|alma_mater = State University of Gorky

|doctoral_advisor = Aleksandr Andronov

|doctoral_students =

|known_for = pulsation mechanism for variable stars

|influences =

|influenced =

|prizes = Order of the Red Star, Fyodor Bredikhin Prize, USSR State Prize, Open Society Foundations Professorship

|religion =

}}

Sergei Alexandrovich Zhevakin ({{langx|ru|Серге́й Александрович Жевакин}}; April 11, 1916 – February 21, 2001) was a Russian astronomer.

Zhevakin is credited for identifying ionized helium as the valve for the heat engine that drives the pulsation of Cepheid variable stars.Zhevakin, S. A., "К Теории Цефеид. I", Астрономический журнал, 30 161–179 (1953)Zhevakin, S. A., "К Теории Звездной Переменности. II", Астрономический журнал, 31 141–153 (1954)Zhevakin, S. A., "К Теории Звездной Переменности. III", Астрономический журнал, 31 335–357 (1954)Zhevakin, S. A., "[http://arjournals.annualreviews.org/doi/pdf/10.1146/annurev.aa.01.090163.002055 Physical Basis of the Pulsation Theory of Variable Stars]", Annual Review of Astronomy and Astrophysics, v.1, p.367–400 (1963)