Stellar content of nearby galaxies. III - The local group spiral galaxy M33

BVRI CCD photometry is presented for stars brighter than V = 21 mag in four fields in the nearby spiral galaxy M33. V vs (B - V) and I vs (V - I) color-magnitude diagrams clearly show both a young stellar population (as indicated by the blue main sequence and red supergiant plumes) as well as an int...

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Veröffentlicht in:	The Astronomical journal 1990-01, Vol.99, p.149-177
Hauptverfasser:	Wilson, Christine D., Madore, Barry F., Freedman, Wendy L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astrophysics BRIGHTNESS CHARGE-COUPLED DEVICES CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS CONFIGURATION DISTANCE GALAXIES GIANT STARS MAIN SEQUENCE STARS OPTICAL PROPERTIES PHOTOMETRY PHYSICAL PROPERTIES POPULATIONS RED GIANT STARS SEMICONDUCTOR DEVICES SPIRAL CONFIGURATION STARS 640105 > Astrophysics & Cosmology-- Galaxies SUPERGIANT STARS
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container_title	The Astronomical journal
container_volume	99
creator	Wilson, Christine D. Madore, Barry F. Freedman, Wendy L.
description	BVRI CCD photometry is presented for stars brighter than V = 21 mag in four fields in the nearby spiral galaxy M33. V vs (B - V) and I vs (V - I) color-magnitude diagrams clearly show both a young stellar population (as indicated by the blue main sequence and red supergiant plumes) as well as an intermediate-age population of asymptotic giant branch stars. Deep photometry in the outer field (where crowding is less severe) reveals a population consistent in color and magnitude with the tip of the first red giant branch. The M33 distance modulus, 24.6 + or - 0.3 mag, derived from this Population II component is consistent with a recent redetermination of the distance modulus found from Population I Cepheid variables. Finally, some evidence is presented for a radial gradient in the average internal reddening for the fields in M33 reported here.
doi_str_mv	10.1086/115317
format	Article
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III - The local group spiral galaxy M33</title><source>NASA Technical Reports Server</source><source>Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals</source><source>Alma/SFX Local Collection</source><creator>Wilson, Christine D. ; Madore, Barry F. ; Freedman, Wendy L.</creator><creatorcontrib>Wilson, Christine D. ; Madore, Barry F. ; Freedman, Wendy L.</creatorcontrib><description>BVRI CCD photometry is presented for stars brighter than V = 21 mag in four fields in the nearby spiral galaxy M33. V vs (B - V) and I vs (V - I) color-magnitude diagrams clearly show both a young stellar population (as indicated by the blue main sequence and red supergiant plumes) as well as an intermediate-age population of asymptotic giant branch stars. Deep photometry in the outer field (where crowding is less severe) reveals a population consistent in color and magnitude with the tip of the first red giant branch. The M33 distance modulus, 24.6 + or - 0.3 mag, derived from this Population II component is consistent with a recent redetermination of the distance modulus found from Population I Cepheid variables. Finally, some evidence is presented for a radial gradient in the average internal reddening for the fields in M33 reported here.</description><identifier>ISSN: 0004-6256</identifier><identifier>EISSN: 1538-3881</identifier><identifier>DOI: 10.1086/115317</identifier><language>eng</language><publisher>Legacy CDMS</publisher><subject>Astrophysics ; BRIGHTNESS ; CHARGE-COUPLED DEVICES ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; CONFIGURATION ; DISTANCE ; GALAXIES ; GIANT STARS ; MAIN SEQUENCE STARS ; OPTICAL PROPERTIES ; PHOTOMETRY ; PHYSICAL PROPERTIES ; POPULATIONS ; RED GIANT STARS ; SEMICONDUCTOR DEVICES ; SPIRAL CONFIGURATION ; STARS 640105 -- Astrophysics & Cosmology-- Galaxies ; SUPERGIANT STARS</subject><ispartof>The Astronomical journal, 1990-01, Vol.99, p.149-177</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c281t-fb0bfa606dc87cb12f22064f439f0b1f6b1b07d0dcc7873b068c442a8e156bb83</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27901,27902</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/6863329$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Wilson, Christine D.</creatorcontrib><creatorcontrib>Madore, Barry F.</creatorcontrib><creatorcontrib>Freedman, Wendy L.</creatorcontrib><title>Stellar content of nearby galaxies. III - The local group spiral galaxy M33</title><title>The Astronomical journal</title><description>BVRI CCD photometry is presented for stars brighter than V = 21 mag in four fields in the nearby spiral galaxy M33. V vs (B - V) and I vs (V - I) color-magnitude diagrams clearly show both a young stellar population (as indicated by the blue main sequence and red supergiant plumes) as well as an intermediate-age population of asymptotic giant branch stars. Deep photometry in the outer field (where crowding is less severe) reveals a population consistent in color and magnitude with the tip of the first red giant branch. The M33 distance modulus, 24.6 + or - 0.3 mag, derived from this Population II component is consistent with a recent redetermination of the distance modulus found from Population I Cepheid variables. Finally, some evidence is presented for a radial gradient in the average internal reddening for the fields in M33 reported here.</description><subject>Astrophysics</subject><subject>BRIGHTNESS</subject><subject>CHARGE-COUPLED DEVICES</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>CONFIGURATION</subject><subject>DISTANCE</subject><subject>GALAXIES</subject><subject>GIANT STARS</subject><subject>MAIN SEQUENCE STARS</subject><subject>OPTICAL PROPERTIES</subject><subject>PHOTOMETRY</subject><subject>PHYSICAL PROPERTIES</subject><subject>POPULATIONS</subject><subject>RED GIANT STARS</subject><subject>SEMICONDUCTOR DEVICES</subject><subject>SPIRAL CONFIGURATION</subject><subject>STARS 640105 -- Astrophysics & Cosmology-- Galaxies</subject><subject>SUPERGIANT STARS</subject><issn>0004-6256</issn><issn>1538-3881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1990</creationdate><recordtype>article</recordtype><sourceid>CYI</sourceid><recordid>eNpNkD1PwzAURS0EEqXAL2CwGNhSnu3EcUZU8RFRxECZLdu126A0DrYr0X9PojAwXT3p6Oq-g9A1gQUBwe8JKRgpT9BsSJExIcgpmgFAnnFa8HN0EeMXACEC8hl6_Ui2bVXAxnfJdgl7hzurgj7irWrVT2PjAtd1jTO83lnceqNavA3-0OPYN2E8RuyI3xi7RGdOtdFe_eUcfT49rpcv2er9uV4-rDJDBUmZ06Cd4sA3RpRGE-ooBZ67nFUONHFcEw3lBjbGlKJkGrgweU6VsKTgWgs2R7dTr4-pkdE0yZrdsL-zJkkuOGO0GqC7CeqD_z7YmOS-iWb8tbP-ECUtgA59_0ATfIzBOtmHZq_CURKQo1A5CR3AmwnsVFSySyFKUlWD2CLPS8F-AVWbbXM</recordid><startdate>19900101</startdate><enddate>19900101</enddate><creator>Wilson, Christine D.</creator><creator>Madore, Barry F.</creator><creator>Freedman, Wendy L.</creator><scope>CYE</scope><scope>CYI</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>19900101</creationdate><title>Stellar content of nearby galaxies. III - The local group spiral galaxy M33</title><author>Wilson, Christine D. ; Madore, Barry F. ; Freedman, Wendy L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c281t-fb0bfa606dc87cb12f22064f439f0b1f6b1b07d0dcc7873b068c442a8e156bb83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1990</creationdate><topic>Astrophysics</topic><topic>BRIGHTNESS</topic><topic>CHARGE-COUPLED DEVICES</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>CONFIGURATION</topic><topic>DISTANCE</topic><topic>GALAXIES</topic><topic>GIANT STARS</topic><topic>MAIN SEQUENCE STARS</topic><topic>OPTICAL PROPERTIES</topic><topic>PHOTOMETRY</topic><topic>PHYSICAL PROPERTIES</topic><topic>POPULATIONS</topic><topic>RED GIANT STARS</topic><topic>SEMICONDUCTOR DEVICES</topic><topic>SPIRAL CONFIGURATION</topic><topic>STARS 640105 -- Astrophysics & Cosmology-- Galaxies</topic><topic>SUPERGIANT STARS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wilson, Christine D.</creatorcontrib><creatorcontrib>Madore, Barry F.</creatorcontrib><creatorcontrib>Freedman, Wendy L.</creatorcontrib><collection>NASA Scientific and Technical Information</collection><collection>NASA Technical Reports Server</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astronomical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wilson, Christine D.</au><au>Madore, Barry F.</au><au>Freedman, Wendy L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Stellar content of nearby galaxies. III - The local group spiral galaxy M33</atitle><jtitle>The Astronomical journal</jtitle><date>1990-01-01</date><risdate>1990</risdate><volume>99</volume><spage>149</spage><epage>177</epage><pages>149-177</pages><issn>0004-6256</issn><eissn>1538-3881</eissn><abstract>BVRI CCD photometry is presented for stars brighter than V = 21 mag in four fields in the nearby spiral galaxy M33. V vs (B - V) and I vs (V - I) color-magnitude diagrams clearly show both a young stellar population (as indicated by the blue main sequence and red supergiant plumes) as well as an intermediate-age population of asymptotic giant branch stars. Deep photometry in the outer field (where crowding is less severe) reveals a population consistent in color and magnitude with the tip of the first red giant branch. The M33 distance modulus, 24.6 + or - 0.3 mag, derived from this Population II component is consistent with a recent redetermination of the distance modulus found from Population I Cepheid variables. Finally, some evidence is presented for a radial gradient in the average internal reddening for the fields in M33 reported here.</abstract><cop>Legacy CDMS</cop><doi>10.1086/115317</doi><tpages>29</tpages></addata></record>
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subjects	Astrophysics BRIGHTNESS CHARGE-COUPLED DEVICES CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS CONFIGURATION DISTANCE GALAXIES GIANT STARS MAIN SEQUENCE STARS OPTICAL PROPERTIES PHOTOMETRY PHYSICAL PROPERTIES POPULATIONS RED GIANT STARS SEMICONDUCTOR DEVICES SPIRAL CONFIGURATION STARS 640105 -- Astrophysics & Cosmology-- Galaxies SUPERGIANT STARS
title	Stellar content of nearby galaxies. III - The local group spiral galaxy M33
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