Published May 6, 2021 | Version v1
Thesis Open

What's Hiding Amongst the Pulses?: Using Phase Modulation in the Light Curves of RR Lyrae Variables to Search for Black Holes

Authors/Creators

  • 1. Harvard University

Contributors

  • 1. Harvard University

Description

The Light Travel Time Effect (LTTE) is a powerful tool to identify variable stars in binary systems and their unseen companions. The phase change in the light curve of a variable star due to the star’s orbital motion can be used to find the mass of its companion. In this thesis, a phase detector was developed, which fits temporal subsets of data to determine phase changes over time in order to identify occurrences of LTTE. The phase variation of two candidate RR Lyrae are analyzed: EL Hya, which was identified from Asteroid Terrestrial-impact Last Alert System (ATLAS) data, and AR Ser, which was the dimmest candidate binary identified by proper motion anomaly in Kervella et al. (2019a). Using data from ATLAS, All-Sky Automated Survey for Supernovae (ASAS-SN), the Catalina Sky Survey, and the Siding Spring Survey, it was found that for both EL Hya and AR Ser the amplitude and period of their phase variation changes as a function of time. Hence, it is likely that both stars are impacted by the Blazhko effect, an internal phase variation in RR Lyrae, and it is unlikely that the phase change is caused by LTTE. If the variations are caused by binarity, EL Hya would be orbiting an object of at least 4.33 M\(_{\odot}\) and AR Ser would be orbiting one of at least 34.1 M\(_{\odot}\), which would likely be a black hole. Thus, LTTE offers the potential to discover variable stars in binaries with black holes.

Notes

Astro 99

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References

  • Abbott, B. P., Abbott, R., Abbott, T. D., et al. 2016, Physical Review Letters, 116, 061102, doi: 10.1103/PhysRevLett.116.061102
  • Abbott, R., Abbott, T. D., Abraham, S., et al. 2020a, Phys. Rev. Lett., 125, 101102, doi: 10.1103/PhysRevLett.125.101102
  • —. 2020b, ApJ, 900, L13, doi: 10.3847/2041-8213/aba493
  • —. 2020c, ApJ, 896, L44, doi: 10.3847/2041-8213/ab960f
  • Abrams, N. S., & Takada, M. 2020, ApJ, 905, 121, doi: 10.3847/1538-4357/ abc6aa
  • Alcock, C., Allsman, R., Alves, D. R., et al. 2000, ApJ, 542, 257, doi: 10.1086/ 309530
  • Bailey, S. I. 1902, Annals of Harvard College Observatory, 38, 1
  • Bailey, S. I., & Pickering, E. C. 1913, Annals of Harvard College Observatory, 78, 1
  • Baker, N., & Kippenhahn, R. 1962, ZAp, 54, 114
  • Baumgardt, H., Makino, J., Hut, P., McMillan, S., & Portegies Zwart, S. 2003, ApJ, 589, L25, doi: 10.1086/375802
  • Benk˝o, J. M., Kolenberg, K., Szab´o, R., et al. 2010, MNRAS, 409, 1585, doi: 10.1111/j.1365-2966.2010.17401.x
  • Bennett, D. P., Becker, A. C., Calitz, J. J., et al. 2002, arXiv e-prints, astro. https://arxiv.org/abs/astro-ph/0207006
  • Blaˇzko, S. 1907, Astronomische Nachrichten, 175, 325, doi: 10.1002/asna. 19071752002
  • Brunt, D. 1913, The Observatory, 36, 59
  • Carroll, B. W., & Ostlie, D. A. 2006, An introduction to modern astrophysics and cosmology
  • Catelan, M., & Smith, H. A. 2015, Pulsating Stars
  • Chadid, M., Wade, G. A., Shorlin, S. L. S., & Landstreet, J. D. 2004, in Astronomical Society of the Pacific Conference Series, Vol. 310, IAU Colloq. 193: Variable Stars in the Local Group, ed. D. W. Kurtz & K. R. Pollard, 535
  • Coughlin, E. R., Armitage, P. J., Nixon, C., & Begelman, M. C. 2017, MNRAS, 465, 3840, doi: 10.1093/mnras/stw2913
  • Cousens, A. 1983, MNRAS, 203, 1171, doi: 10.1093/mnras/203.4.1171
  • Cox, A. N. 2013, in Stellar Pulsations: Impact of New Instrumentation and New Insights, ed. J. C. Su´arez, R. Garrido, L. A. Balona, & J. Christensen-Dalsgaard, Vol. 31, 77, doi: 10.1007/978-3-642-29630-7_15
  • Cox, J. P. 1980, Theory of stellar pulsation
  • Cox, J. P., Cox, A. N., Olsen, K. H., King, D. S., & Eilers, D. D. 1966, ApJ, 144, 1038, doi: 10.1086/148702
  • Drake, A. J., Djorgovski, S. G., Mahabal, A., et al. 2009, ApJ, 696, 870, doi: 10.1088/0004-637X/696/1/870
  • Duchˆene, G., & Kraus, A. 2013, ARA&A, 51, 269, doi: 10.1146/ annurev-astro-081710-102602
  • El-Badry, K., Rix, H.-W., & Heintz, T. M. 2021, MNRAS, doi: 10.1093/mnras/ stab323
  • Farr, W. M., Sravan, N., Cantrell, A., et al. 2011, The Astrophysical Journal, 741, 103, doi: 10.1088/0004-637x/741/2/103
  • Fragione, G., Leigh, N. W. C., Perna, R., & Kocsis, B. 2019, MNRAS, 489, 727, doi: 10.1093/mnras/stz2213
  • Fragione, G., Perna, R., & Loeb, A. 2020, MNRAS, doi: 10.1093/mnras/staa3493
  • Furness, C. E. 1915, An introduction to the study of variable stars
  • Greene, J. E., Strader, J., & Ho, L. C. 2020, ARA&A, 58, 257, doi: 10.1146/ annurev-astro-032620-021835
  • Griest, K., Alcock, C., Axelrod, T. S., et al. 1991, ApJ, 372, L79, doi: 10.1086/ 186028
  • Hajdu, G., Catelan, M., Jurcsik, J., et al. 2015, MNRAS, 449, L113, doi: 10.1093/mnrasl/slv024
  • Heinze, A. N., Tonry, J. L., Denneau, L., et al. 2018, AJ, 156, 241, doi: 10.3847/ 1538-3881/aae47f
  • Hermes, J. J. 2018, Timing by Stellar Pulsations as an Exoplanet Discovery Method, ed. H. J. Deeg & J. A. Belmonte, 6, doi: 10.1007/978-3-319-55333-7_6
  • Hilditch, R. W. 2001, An Introduction to Close Binary Stars (Cambridge University Press), doi: 10.1017/CBO9781139163576
  • Ibata, R., Bellazzini, M., Chapman, S. C., et al. 2009, ApJ, 699, L169, doi: 10.1088/0004-637X/699/2/L169
  • Illingworth, G., & King, I. R. 1977, ApJ, 218, L109, doi: 10.1086/182586
  • Irwin, J. B. 1952, ApJ, 116, 211, doi: 10.1086/145604
  • Jayasinghe, T., Stanek, K. Z., Kochanek, C. S., et al. 2020, MNRAS, 493, 4186, doi: 10.1093/mnras/staa499
  • Jurcsik, J., Hurta, Z., S´odor, A., et al. 2009, MNRAS, 397, 350, doi: ´ 10.1111/j. 1365-2966.2009.14919.x
  • Kains, N., Calamida, A., Sahu, K. C., et al. 2018, ApJ, 867, 37, doi: 10.3847/ 1538-4357/aae311
  • Kervella, P., Gallenne, A., Remage Evans, N., et al. 2019a, A&A, 623, A116, doi: 10.1051/0004-6361/201834210
  • Kervella, P., Gallenne, A., Evans, N. R., et al. 2019b, A&A, 623, A117, doi: 10.1051/0004-6361/201834211
  • King, D. S., & Cox, J. P. 1968, PASP, 80, 365, doi: 10.1086/128650
  • Kochanek, C. S., Shappee, B. J., Stanek, K. Z., et al. 2017, PASP, 129, 104502, doi: 10.1088/1538-3873/aa80d9
  • Kolenberg, K., & Bagnulo, S. 2009, in American Institute of Physics Conference Series, Vol. 1170, Stellar Pulsation: Challenges for Theory and Observation, ed. J. A. Guzik & P. A. Bradley, 281–285, doi: 10.1063/1.3246493
  • Kramers, H. A. 1923, The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 46, 836, doi: 10.1080/14786442308565244
  • Lanzoni, B., Dalessandro, E., Ferraro, F. R., et al. 2007, ApJ, 668, L139, doi: 10.1086/522927
  • Layden, A. C., Hanson, R. B., Hawley, S. L., Klemola, A. R., & Hanley, C. J. 1996, AJ, 112, 2110, doi: 10.1086/118167
  • Li, G., Fu, J., Su, J., et al. 2018a, MNRAS, 473, 398, doi: 10.1093/mnras/stx2331
  • Li, L.-J., Qian, S.-B., Zhang, J., Zhu, L.-Y., & Liao, W.-P. 2018b, Research in Astronomy and Astrophysics, 18, 011, doi: 10.1088/1674-4527/18/1/11
  • Li, L. J., Qian, S. B., & Zhu, L. Y. 2018c, ApJ, 863, 151, doi: 10.3847/ 1538-4357/aad32f
  • Liska, J., Skarka, M., Mikulasek, Z., Zejda, M., & Chrastina, M. 2016, VizieR Online Data Catalog, J/A+A/589/A94
  • Liu, F. K., Li, S., & Chen, X. 2009, ApJ, 706, L133, doi: 10.1088/0004-637X/ 706/1/L133
  • Liˇska, J., Skarka, M., Zejda, M., Mikul´aˇsek, Z., & de Villiers, S. N. 2016, MNRAS, 459, 4360, doi: 10.1093/mnras/stw851
  • Lu, J. R., Lam, C. Y., Medford, M., Dawson, W., & Golovich, N. 2019, Research Notes of the American Astronomical Society, 3, 58, doi: 10.3847/2515-5172/ ab1421
  • Lu, J. R., Sinukoff, E., Ofek, E. O., Udalski, A., & Kozlowski, S. 2016, ApJ, 830, 41, doi: 10.3847/0004-637X/830/1/41
  • Luri, X., Brown, A. G. A., Sarro, L. M., et al. 2018, A&A, 616, A9, doi: 10.1051/0004-6361/201832964
  • Mackebrandt, F. 2020, arXiv e-prints, arXiv:2009.01669. https://arxiv.org/ abs/2009.01669
  • Mao, S., & Paczynski, B. 1991, ApJ, 374, L37, doi: 10.1086/186066
  • Mao, S., Smith, M. C., Wo´zniak, P., et al. 2002, MNRAS, 329, 349, doi: 10.1046/j.1365-8711.2002.04986.x
  • McNamara, B. J., Harrison, T. E., Baumgardt, H., & Khalaj, P. 2012, ApJ, 745, 175, doi: 10.1088/0004-637X/745/2/175
  • Nemec, J. M. 1985, AJ, 90, 204, doi: 10.1086/113727
  • Nowakowski, R. M., & Dziembowski, W. A. 2003, Ap&SS, 284, 273. https: //arxiv.org/abs/astro-ph/0301504
  • Onken, C. A., Wolf, C., Bessell, M. S., et al. 2019, , 36, e033, doi: 10.1017/pasa. 2019.27
  • Orosz, J. A., McClintock, J. E., Narayan, R., et al. 2007, Nature, 449, 872, doi: 10.1038/nature06218
  • Ozel, F., Psaltis, D., Narayan, R., & McClintock, J. E. 2010, ApJ, 725, 1918, ¨ doi: 10.1088/0004-637X/725/2/1918
  • Paczynski, B. 1986, ApJ, 304, 1, doi: 10.1086/164140
  • Petersen, J. O., & Jørgensen, H. E. 1972, A&A, 17, 367
  • Pietrukowicz, P., Soszy´nski, I., Netzel, H., et al. 2020, , 70, 241, doi: 10.32023/ 0001-5237/70.4.1
  • Prudil, Z., Skarka, M., Liˇska, J., Grebel, E. K., & Lee, C. U. 2019, MNRAS, 487, L1, doi: 10.1093/mnrasl/slz069
  • Shapley, H. 1914, ApJ, 40, 448, doi: 10.1086/142137
  • Shappee, B. J., Prieto, J. L., Grupe, D., et al. 2014, ApJ, 788, 48, doi: 10.1088/ 0004-637X/788/1/48
  • Skarka, M., Liˇska, J., Dˇrevˇen´y, R., et al. 2018a, MNRAS, 474, 824, doi: 10.1093/ mnras/stx2737
  • Skarka, M., Liˇska, J., S´odor, A., et al. 2018b, in The RR Lyrae 2017 Conference. ´ Revival of the Classical Pulsators: from Galactic Structure to Stellar Interior Diagnostics, ed. R. Smolec, K. Kinemuchi, & R. I. Anderson, Vol. 6, 243–247. https://arxiv.org/abs/1809.03230
  • Skarka, M., Prudil, Z., & Liˇska, J. 2020, Contributions of the Astronomical Observatory Skalnate Pleso, 50, 442, doi: 10.31577/caosp.2020.50.2.442
  • Smith, H. A. 1995, Cambridge Astrophysics Series, 27
  • Smolec, R., Moskalik, P., Kolenberg, K., et al. 2011, MNRAS, 414, 2950, doi: 10.1111/j.1365-2966.2011.18592.x
  • Soszynski, I., Poleski, R., Udalski, A., et al. 2008, , 58, 163. https: //arxiv.org/abs/0808.2210
  • Sterken, C. 2005, in Astronomical Society of the Pacific Conference Series, Vol. 335, The Light-Time Effect in Astrophysics: Causes and cures of the O-C diagram, ed. C. Sterken, 181
  • Stothers, R. B. 2006, ApJ, 652, 643, doi: 10.1086/508135
  • Szabados, L. 2003, Information Bulletin on Variable Stars, 5394, 1
  • Szab´o, R., Koll´ath, Z., Moln´ar, L., Kolenberg, K., & Kurtz, D. W. 2013, in Stellar Pulsations: Impact of New Instrumentation and New Insights, ed. J. C. Su´arez, R. Garrido, L. A. Balona, & J. Christensen-Dalsgaard, Vol. 31, 81, doi: 10.1007/978-3-642-29630-7_16
  • Szab´o, R., Koll´ath, Z., Moln´ar, L., et al. 2010, MNRAS, 409, 1244, doi: 10.1111/ j.1365-2966.2010.17386.x
  • Szatmary, K. 1990, Journal of the American Association of Variable Star Observers (JAAVSO), 19, 52
  • Thompson, T. A., Kochanek, C. S., Stanek, K. Z., et al. 2019, Science, 366, 637, doi: 10.1126/science.aau4005
  • Tonry, J. L., Denneau, L., Heinze, A. N., et al. 2018, PASP, 130, 064505, doi: 10.1088/1538-3873/aabadf
  • Trenti, M., Vesperini, E., & Pasquato, M. 2010, ApJ, 708, 1598, doi: 10.1088/ 0004-637X/708/2/1598
  • Vega, L. D., Stassun, K. G., Montez, Rodolfo, J., Boyd, P. T., & Somers, G. 2017, ApJ, 839, 48, doi: 10.3847/1538-4357/aa67dd
  • Vogt, N., Schreiber, M. R., Hambsch, F. J., et al. 2017, PASP, 129, 014201, doi: 10.1088/1538-3873/129/971/014201
  • Wade, R. A., Donley, J., Fried, R., White, R. E., & Saha, A. 1999, AJ, 118, 2442, doi: 10.1086/301109
  • Wang, X.-Y., Wang, S., Hinse, T. C., et al. 2018, PASP, 130, 064401, doi: 10.1088/1538-3873/aab93e
  • Wiktorowicz, G., Wyrzykowski, L., Chruslinska, M., et al. 2019, ApJ, 885, 1, doi: 10.3847/1538-4357/ab45e6
  • Woosley, S. E., Blinnikov, S., & Heger, A. 2007, Nature, 450, 390, doi: 10.1038/ nature06333
  • Wyrzykowski, L., & Mandel, I. 2020, A&A, 636, A20, doi: 10.1051/0004-6361/ 201935842
  • Wyrzykowski, L., Rybicki, K. A., Kruszy´nska, K., et al. 2019, in Southern Horizons in Time-Domain Astronomy, ed. R. E. Griffin, Vol. 339, 16–19, doi: 10.1017/S1743921318002107
  • Yilan, E., & Bulut, ˙I. 2016, in 41st COSPAR Scientific Assembly, Vol. 41, E1.16–17–16
  • Zhou, A. Y. 2010, arXiv e-prints, arXiv:1002.2729. https://arxiv.org/abs/ 1002.2729