Classical Cepheids and the spiral structure of the milky way
We use data on space distribution of the currently most complete sample of Cepheids with reliable distances (565 stars), located within ~5 kpc from the Sun, to study the spiral pattern of the Milky Way galaxy. We estimate the pitch angle as 9°−10°; the most accurate estimate, i = 9.5° ± 0.1°, was ob...
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| Veröffentlicht in: | Astronomy letters 2015-09, Vol.41 (9), p.489-500 |
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| container_title | Astronomy letters |
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| creator | Dambis, A. K. Berdnikov, L. N. Efremov, Yu. N. Kniazev, A. Yu Rastorguev, A. S. Glushkova, E. V. Kravtsov, V. V. Turner, D. G. Majaess, D. J. Sefako, R. |
| description | We use data on space distribution of the currently most complete sample of Cepheids with reliable distances (565 stars), located within ~5 kpc from the Sun, to study the spiral pattern of the Milky Way galaxy. We estimate the pitch angle as 9°−10°; the most accurate estimate,
i
= 9.5° ± 0.1°, was obtained assuming the existence of a global four-armed spiral pattern; the solar phase angle in the spiral pattern is χ
⊙
= −121° ± 3°. Comparing positions of the spiral arms delineated by classical Cepheids and galactic masers, with the age difference of these objects in mind, we estimate the rotation angular speed of the spiral pattern to be Ω
P
= 25.2 ± 0.5 km s
−1
kpc
−1
. |
| doi_str_mv | 10.1134/S1063773715090017 |
| format | Article |
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i
= 9.5° ± 0.1°, was obtained assuming the existence of a global four-armed spiral pattern; the solar phase angle in the spiral pattern is χ
⊙
= −121° ± 3°. Comparing positions of the spiral arms delineated by classical Cepheids and galactic masers, with the age difference of these objects in mind, we estimate the rotation angular speed of the spiral pattern to be Ω
P
= 25.2 ± 0.5 km s
−1
kpc
−1
.</description><identifier>ISSN: 1063-7737</identifier><identifier>EISSN: 1562-6873</identifier><identifier>DOI: 10.1134/S1063773715090017</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Angular speed ; Astronomy ; Astrophysics ; Astrophysics and Astroparticles ; Cepheid variables ; Estimates ; Galactic structure ; Milky Way ; Milky Way Galaxy ; Observations and Techniques ; Physics ; Physics and Astronomy ; Pitch angle ; Spirals ; Stars & galaxies</subject><ispartof>Astronomy letters, 2015-09, Vol.41 (9), p.489-500</ispartof><rights>Pleiades Publishing, Inc. 2015</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c448t-29c856c3275483ed0c60c16374daa208dc7941dc3dfefde2584d20255b6cd4b93</citedby><cites>FETCH-LOGICAL-c448t-29c856c3275483ed0c60c16374daa208dc7941dc3dfefde2584d20255b6cd4b93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S1063773715090017$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S1063773715090017$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Dambis, A. K.</creatorcontrib><creatorcontrib>Berdnikov, L. N.</creatorcontrib><creatorcontrib>Efremov, Yu. N.</creatorcontrib><creatorcontrib>Kniazev, A. Yu</creatorcontrib><creatorcontrib>Rastorguev, A. S.</creatorcontrib><creatorcontrib>Glushkova, E. V.</creatorcontrib><creatorcontrib>Kravtsov, V. V.</creatorcontrib><creatorcontrib>Turner, D. G.</creatorcontrib><creatorcontrib>Majaess, D. J.</creatorcontrib><creatorcontrib>Sefako, R.</creatorcontrib><title>Classical Cepheids and the spiral structure of the milky way</title><title>Astronomy letters</title><addtitle>Astron. Lett</addtitle><description>We use data on space distribution of the currently most complete sample of Cepheids with reliable distances (565 stars), located within ~5 kpc from the Sun, to study the spiral pattern of the Milky Way galaxy. We estimate the pitch angle as 9°−10°; the most accurate estimate,
i
= 9.5° ± 0.1°, was obtained assuming the existence of a global four-armed spiral pattern; the solar phase angle in the spiral pattern is χ
⊙
= −121° ± 3°. Comparing positions of the spiral arms delineated by classical Cepheids and galactic masers, with the age difference of these objects in mind, we estimate the rotation angular speed of the spiral pattern to be Ω
P
= 25.2 ± 0.5 km s
−1
kpc
−1
.</description><subject>Angular speed</subject><subject>Astronomy</subject><subject>Astrophysics</subject><subject>Astrophysics and Astroparticles</subject><subject>Cepheid variables</subject><subject>Estimates</subject><subject>Galactic structure</subject><subject>Milky Way</subject><subject>Milky Way Galaxy</subject><subject>Observations and Techniques</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Pitch angle</subject><subject>Spirals</subject><subject>Stars & galaxies</subject><issn>1063-7737</issn><issn>1562-6873</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqNkE9Lw0AQxRdRsFY_gLeAFy_Rmf2bgBcJVoWCB_Uctrsbm5omcTdB-u3dWg-iCJ5mmPd7w8wj5BThApHxy0cEyZRiCgXkAKj2yASFpKnMFNuPfZTTrX5IjkJYAUDOGEzIVdHoEGqjm6Rw_dLVNiS6tcmwdEnoax_nYfCjGUbvkq76nK_r5nWTvOvNMTmodBPcyVedkufZzVNxl84fbu-L63lqOM-GlOYmE9IwqgTPmLNgJBiM53KrNYXMGpVztIbZylXWUZFxS4EKsZDG8kXOpuR8t7f33dvowlCu62Bc0-jWdWMoUQkmKOf5f1BKMWMxs4ie_UBX3ejb-EikEKlgkm8p3FHGdyF4V5W9r9fab0qEcht9-Sv66KE7T4hs--L8t81_mj4A9AOCwA</recordid><startdate>20150901</startdate><enddate>20150901</enddate><creator>Dambis, A. 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K.</au><au>Berdnikov, L. N.</au><au>Efremov, Yu. N.</au><au>Kniazev, A. Yu</au><au>Rastorguev, A. S.</au><au>Glushkova, E. V.</au><au>Kravtsov, V. V.</au><au>Turner, D. G.</au><au>Majaess, D. J.</au><au>Sefako, R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Classical Cepheids and the spiral structure of the milky way</atitle><jtitle>Astronomy letters</jtitle><stitle>Astron. Lett</stitle><date>2015-09-01</date><risdate>2015</risdate><volume>41</volume><issue>9</issue><spage>489</spage><epage>500</epage><pages>489-500</pages><issn>1063-7737</issn><eissn>1562-6873</eissn><abstract>We use data on space distribution of the currently most complete sample of Cepheids with reliable distances (565 stars), located within ~5 kpc from the Sun, to study the spiral pattern of the Milky Way galaxy. We estimate the pitch angle as 9°−10°; the most accurate estimate,
i
= 9.5° ± 0.1°, was obtained assuming the existence of a global four-armed spiral pattern; the solar phase angle in the spiral pattern is χ
⊙
= −121° ± 3°. Comparing positions of the spiral arms delineated by classical Cepheids and galactic masers, with the age difference of these objects in mind, we estimate the rotation angular speed of the spiral pattern to be Ω
P
= 25.2 ± 0.5 km s
−1
kpc
−1
.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S1063773715090017</doi><tpages>12</tpages></addata></record> |
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| subjects | Angular speed Astronomy Astrophysics Astrophysics and Astroparticles Cepheid variables Estimates Galactic structure Milky Way Milky Way Galaxy Observations and Techniques Physics Physics and Astronomy Pitch angle Spirals Stars & galaxies |
| title | Classical Cepheids and the spiral structure of the milky way |
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