Photometric and Spectroscopic Analysis of the SX Phe Star BL Cam
In the present paper, we report the photometric and spectroscopic observations of the pulsating star BL Cam obtained by the 1.88 m telescope at the Kottamia astronomical observatory (KAO). Fourier analysis of the light curves indicates one frequency, 25.14427 c/d, with harmonics 51.112 c/d, 33.388 c...
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| Veröffentlicht in: | Astrophysics 2022-12, Vol.65 (4), p.456-469 |
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| creator | Abdel-Sabour, M. Nouh, M. I. Shokry, A. Hamed, G. M. Ismail, H. A. Takey, A. Ata, S. A. Zead, I. |
| description | In the present paper, we report the photometric and spectroscopic observations of the pulsating star BL Cam obtained by the 1.88 m telescope at the Kottamia astronomical observatory (KAO). Fourier analysis of the light curves indicates one frequency, 25.14427 c/d, with harmonics 51.112 c/d, 33.388 c/d, and 17.72464 c/d. The frequency of 31-32 c/d reported in the literature is not detected in our data except for one close to 33.3882934 c/d. A total of 55 new times of maximum light have been presented. A new value of (1/P) dP/dt is estimated using the O-C diagram based on all newly obtained times of maximum light combined with those taken from the literature, assuming the periods are decreasing and changing smoothly. Using model atmosphere analysis, we computed the effective temperature and surface gravity as T
eff
= 7625 ± 300 K and logg = 4.30 ± 0.37. The bolometric magnitude M
bol
= 2.335, radius R = 1.69 R
⨀
, luminosity L = 0.957 L
⨀
, the mass M = 1.68M
⨀
, and pulsation constant Q = 0.025 days. Locations of the star on the M-R and M-L diagrams indicate that it is close to the ZAMS track and is an unevolved star. |
| doi_str_mv | 10.1007/s10511-023-09754-6 |
| format | Article |
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eff
= 7625 ± 300 K and logg = 4.30 ± 0.37. The bolometric magnitude M
bol
= 2.335, radius R = 1.69 R
⨀
, luminosity L = 0.957 L
⨀
, the mass M = 1.68M
⨀
, and pulsation constant Q = 0.025 days. Locations of the star on the M-R and M-L diagrams indicate that it is close to the ZAMS track and is an unevolved star.</description><identifier>ISSN: 0571-7256</identifier><identifier>EISSN: 1573-8191</identifier><identifier>DOI: 10.1007/s10511-023-09754-6</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Analysis ; Astronomy ; Astrophysics ; Astrophysics and Astroparticles ; Astrophysics and Cosmology ; Celestial bodies ; Computer-aided manufacturing ; Fourier analysis ; Light curve ; Luminosity ; Observations and Techniques ; Photometry ; Physics ; Physics and Astronomy ; Space Exploration and Astronautics ; Space Sciences (including Extraterrestrial Physics ; Spectroscopic analysis ; Spectroscopic observation ; Stars</subject><ispartof>Astrophysics, 2022-12, Vol.65 (4), p.456-469</ispartof><rights>Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</rights><rights>COPYRIGHT 2022 Springer</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c464t-5006b35bec6d8949221acfa3b1f6d1ce03849ec574a9c5b1967321b451d806713</citedby><cites>FETCH-LOGICAL-c464t-5006b35bec6d8949221acfa3b1f6d1ce03849ec574a9c5b1967321b451d806713</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10511-023-09754-6$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10511-023-09754-6$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Abdel-Sabour, M.</creatorcontrib><creatorcontrib>Nouh, M. I.</creatorcontrib><creatorcontrib>Shokry, A.</creatorcontrib><creatorcontrib>Hamed, G. M.</creatorcontrib><creatorcontrib>Ismail, H. A.</creatorcontrib><creatorcontrib>Takey, A.</creatorcontrib><creatorcontrib>Ata, S. A.</creatorcontrib><creatorcontrib>Zead, I.</creatorcontrib><title>Photometric and Spectroscopic Analysis of the SX Phe Star BL Cam</title><title>Astrophysics</title><addtitle>Astrophysics</addtitle><description>In the present paper, we report the photometric and spectroscopic observations of the pulsating star BL Cam obtained by the 1.88 m telescope at the Kottamia astronomical observatory (KAO). Fourier analysis of the light curves indicates one frequency, 25.14427 c/d, with harmonics 51.112 c/d, 33.388 c/d, and 17.72464 c/d. The frequency of 31-32 c/d reported in the literature is not detected in our data except for one close to 33.3882934 c/d. A total of 55 new times of maximum light have been presented. A new value of (1/P) dP/dt is estimated using the O-C diagram based on all newly obtained times of maximum light combined with those taken from the literature, assuming the periods are decreasing and changing smoothly. Using model atmosphere analysis, we computed the effective temperature and surface gravity as T
eff
= 7625 ± 300 K and logg = 4.30 ± 0.37. The bolometric magnitude M
bol
= 2.335, radius R = 1.69 R
⨀
, luminosity L = 0.957 L
⨀
, the mass M = 1.68M
⨀
, and pulsation constant Q = 0.025 days. Locations of the star on the M-R and M-L diagrams indicate that it is close to the ZAMS track and is an unevolved star.</description><subject>Analysis</subject><subject>Astronomy</subject><subject>Astrophysics</subject><subject>Astrophysics and Astroparticles</subject><subject>Astrophysics and Cosmology</subject><subject>Celestial bodies</subject><subject>Computer-aided manufacturing</subject><subject>Fourier analysis</subject><subject>Light curve</subject><subject>Luminosity</subject><subject>Observations and Techniques</subject><subject>Photometry</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Space Exploration and Astronautics</subject><subject>Space Sciences (including Extraterrestrial Physics</subject><subject>Spectroscopic analysis</subject><subject>Spectroscopic observation</subject><subject>Stars</subject><issn>0571-7256</issn><issn>1573-8191</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp9kU1rGzEQhkVpoG6SP9DTQk49rDOz-lrd4pq0MRga4gR6E1qt1tngXbmSDPW_r1IHjKEEHQaG5xk08xLyBWGKAPI6InDEEipagpKcleIDmSCXtKxR4UcyAS6xlBUXn8jnGF8AQAklJuTm_tknP7gUeluYsS1WW2dT8NH6be7MRrPZxz4WvivSsytWv4r715JMKL4ti7kZLshZZzbRXb7Vc_L0_fZxflcuf_5YzGfL0jLBUskBREN546xoa8VUVaGxnaENdqJF64DWTDnLJTPK8gaVkLTChnFsaxAS6Tm5OszdBv9752LSL34X8veirqQQrAZV8SO1Nhun-7HzKRg79NHqmaSCMU4ZZGr6Hyq_1g299aPr-tw_Eb6eCJlJ7k9am12MerF6OGWrA2vzFWNwnd6GfjBhrxH0a1j6EJbOYel_YWmRJXqQYobHtQvH7d6x_gKTDpID</recordid><startdate>20221201</startdate><enddate>20221201</enddate><creator>Abdel-Sabour, M.</creator><creator>Nouh, M. I.</creator><creator>Shokry, A.</creator><creator>Hamed, G. M.</creator><creator>Ismail, H. A.</creator><creator>Takey, A.</creator><creator>Ata, S. A.</creator><creator>Zead, I.</creator><general>Springer US</general><general>Springer</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>ISR</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>20221201</creationdate><title>Photometric and Spectroscopic Analysis of the SX Phe Star BL Cam</title><author>Abdel-Sabour, M. ; Nouh, M. I. ; Shokry, A. ; Hamed, G. M. ; Ismail, H. A. ; Takey, A. ; Ata, S. 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I.</creatorcontrib><creatorcontrib>Shokry, A.</creatorcontrib><creatorcontrib>Hamed, G. M.</creatorcontrib><creatorcontrib>Ismail, H. A.</creatorcontrib><creatorcontrib>Takey, A.</creatorcontrib><creatorcontrib>Ata, S. A.</creatorcontrib><creatorcontrib>Zead, I.</creatorcontrib><collection>CrossRef</collection><collection>Gale In Context: Science</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Astrophysics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Abdel-Sabour, M.</au><au>Nouh, M. I.</au><au>Shokry, A.</au><au>Hamed, G. M.</au><au>Ismail, H. A.</au><au>Takey, A.</au><au>Ata, S. A.</au><au>Zead, I.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photometric and Spectroscopic Analysis of the SX Phe Star BL Cam</atitle><jtitle>Astrophysics</jtitle><stitle>Astrophysics</stitle><date>2022-12-01</date><risdate>2022</risdate><volume>65</volume><issue>4</issue><spage>456</spage><epage>469</epage><pages>456-469</pages><issn>0571-7256</issn><eissn>1573-8191</eissn><abstract>In the present paper, we report the photometric and spectroscopic observations of the pulsating star BL Cam obtained by the 1.88 m telescope at the Kottamia astronomical observatory (KAO). Fourier analysis of the light curves indicates one frequency, 25.14427 c/d, with harmonics 51.112 c/d, 33.388 c/d, and 17.72464 c/d. The frequency of 31-32 c/d reported in the literature is not detected in our data except for one close to 33.3882934 c/d. A total of 55 new times of maximum light have been presented. A new value of (1/P) dP/dt is estimated using the O-C diagram based on all newly obtained times of maximum light combined with those taken from the literature, assuming the periods are decreasing and changing smoothly. Using model atmosphere analysis, we computed the effective temperature and surface gravity as T
eff
= 7625 ± 300 K and logg = 4.30 ± 0.37. The bolometric magnitude M
bol
= 2.335, radius R = 1.69 R
⨀
, luminosity L = 0.957 L
⨀
, the mass M = 1.68M
⨀
, and pulsation constant Q = 0.025 days. Locations of the star on the M-R and M-L diagrams indicate that it is close to the ZAMS track and is an unevolved star.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10511-023-09754-6</doi><tpages>14</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Analysis Astronomy Astrophysics Astrophysics and Astroparticles Astrophysics and Cosmology Celestial bodies Computer-aided manufacturing Fourier analysis Light curve Luminosity Observations and Techniques Photometry Physics Physics and Astronomy Space Exploration and Astronautics Space Sciences (including Extraterrestrial Physics Spectroscopic analysis Spectroscopic observation Stars |
| title | Photometric and Spectroscopic Analysis of the SX Phe Star BL Cam |
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