O-C Analysis of the Pulsating Subdwarf B Star PG 1219 + 534

Tomomi Otani; Terry Oswalt; Alexander Stone-Martinez; Dana Singh; Kenneth Sampson; Aliyah Khan; Austin Seepersad; Caila DeAbreu; Adam Moss; Claudia Morello

O-C Analysis of the Pulsating Subdwarf B Star PG 1219 + 534

Tomomi Otani, Terry Oswalt, Alexander Stone-Martinez, Dana Singh, Kenneth Sampson, Aliyah Khan, Austin Seepersad, Caila DeAbreu, Adam Moss, Claudia Morello

Physical Sciences

Embry-Riddle Aeronautical University

Research output: Contribution to journal › Article › peer-review

Abstract

PG 1219 + 534 (KY Uma) is a subdwarf B pulsating star with multiple periodicities between 120 – 175 s. PG 1219 + 534 was monitored for 90 hours during 2010-1 and 2016 using the 0.9 m SARA-KP telescope at Kitt Peak National Observatory (KPNO) in Arizona and the 0.8m Ortega telescope at Florida Institute of Technology in Melbourne, Florida. So far, the most promising theory for the origin of subdwarf B (sdB) stars is that they result from binary mass transfer near the Helium Flash stage of evolution. The observations of PG 1219 + 534 reported here are part of our program to constrain this evolutional theory by searching for companions and determining orbital separations around sdB pulsators using the Observed-minus-Calculated (O-C) method. A star’s position in space will wobble due to the gravitational forces of any companion or planet. If the star emits periodic signal like pulsations, its orbital motion around the system’s center of mass causes periodic changes in the light pulse arrival times. In this poster, we present our time-series photometry and O-C analysis of this data.

Original language	American English
Journal	Default journal
State	Published - Jan 1 2017

Keywords

subdwarf B
pulsating star

Disciplines

Stars, Interstellar Medium and the Galaxy

Access to Document

O-C Analysis of the Pulsating Subdwarf B Star PG 1219 + 534Final published version, 1.25 MBLicense: CC BY

Cite this

@article{976f7b4ac2ef40fc8dc165ef31476d91,

title = "O-C Analysis of the Pulsating Subdwarf B Star PG 1219 + 534",

abstract = " PG 1219 + 534 (KY Uma) is a subdwarf B pulsating star with multiple periodicities between 120 – 175 s. PG 1219 + 534 was monitored for 90 hours during 2010-1 and 2016 using the 0.9 m SARA-KP telescope at Kitt Peak National Observatory (KPNO) in Arizona and the 0.8m Ortega telescope at Florida Institute of Technology in Melbourne, Florida. So far, the most promising theory for the origin of subdwarf B (sdB) stars is that they result from binary mass transfer near the Helium Flash stage of evolution. The observations of PG 1219 + 534 reported here are part of our program to constrain this evolutional theory by searching for companions and determining orbital separations around sdB pulsators using the Observed-minus-Calculated (O-C) method. A star{\textquoteright}s position in space will wobble due to the gravitational forces of any companion or planet. If the star emits periodic signal like pulsations, its orbital motion around the system{\textquoteright}s center of mass causes periodic changes in the light pulse arrival times. In this poster, we present our time-series photometry and O-C analysis of this data.",

keywords = "subdwarf B, pulsating star",

author = "Tomomi Otani and Terry Oswalt and Alexander Stone-Martinez and Dana Singh and Kenneth Sampson and Aliyah Khan and Austin Seepersad and Caila DeAbreu and Adam Moss and Claudia Morello",

year = "2017",

month = jan,

day = "1",

language = "American English",

journal = "Default journal",

}

TY - JOUR

T1 - O-C Analysis of the Pulsating Subdwarf B Star PG 1219 + 534

AU - Otani, Tomomi

AU - Oswalt, Terry

AU - Stone-Martinez, Alexander

AU - Singh, Dana

AU - Sampson, Kenneth

AU - Khan, Aliyah

AU - Seepersad, Austin

AU - DeAbreu, Caila

AU - Moss, Adam

AU - Morello, Claudia

PY - 2017/1/1

Y1 - 2017/1/1

N2 - PG 1219 + 534 (KY Uma) is a subdwarf B pulsating star with multiple periodicities between 120 – 175 s. PG 1219 + 534 was monitored for 90 hours during 2010-1 and 2016 using the 0.9 m SARA-KP telescope at Kitt Peak National Observatory (KPNO) in Arizona and the 0.8m Ortega telescope at Florida Institute of Technology in Melbourne, Florida. So far, the most promising theory for the origin of subdwarf B (sdB) stars is that they result from binary mass transfer near the Helium Flash stage of evolution. The observations of PG 1219 + 534 reported here are part of our program to constrain this evolutional theory by searching for companions and determining orbital separations around sdB pulsators using the Observed-minus-Calculated (O-C) method. A star’s position in space will wobble due to the gravitational forces of any companion or planet. If the star emits periodic signal like pulsations, its orbital motion around the system’s center of mass causes periodic changes in the light pulse arrival times. In this poster, we present our time-series photometry and O-C analysis of this data.

AB - PG 1219 + 534 (KY Uma) is a subdwarf B pulsating star with multiple periodicities between 120 – 175 s. PG 1219 + 534 was monitored for 90 hours during 2010-1 and 2016 using the 0.9 m SARA-KP telescope at Kitt Peak National Observatory (KPNO) in Arizona and the 0.8m Ortega telescope at Florida Institute of Technology in Melbourne, Florida. So far, the most promising theory for the origin of subdwarf B (sdB) stars is that they result from binary mass transfer near the Helium Flash stage of evolution. The observations of PG 1219 + 534 reported here are part of our program to constrain this evolutional theory by searching for companions and determining orbital separations around sdB pulsators using the Observed-minus-Calculated (O-C) method. A star’s position in space will wobble due to the gravitational forces of any companion or planet. If the star emits periodic signal like pulsations, its orbital motion around the system’s center of mass causes periodic changes in the light pulse arrival times. In this poster, we present our time-series photometry and O-C analysis of this data.

KW - subdwarf B

KW - pulsating star

UR - https://commons.erau.edu/publication/1052

M3 - Article

JO - Default journal

JF - Default journal

ER -

O-C Analysis of the Pulsating Subdwarf B Star PG 1219 + 534

Abstract

Keywords

Disciplines

Access to Document

Other files and links

Cite this