Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-25T15:36:43.984Z Has data issue: false hasContentIssue false
  • English
  • Français

A study of the stellar photosphere–hydrogen ionization front interaction in δ Scuti stars

Published online by Cambridge University Press:  06 February 2024

Mami Deka Open the ORCID record for Mami Deka [Opens in a new window] ,
Shashi M. Kanbur ,
Sukanta Deb  and
Susmita Das Open the ORCID record for Susmita Das [Opens in a new window]
Mami Deka*
Affiliation:
Department of Physics, Cotton University, Panbazar, Guwahati 781001, Assam, India
Shashi M. Kanbur
Affiliation:
Department of Physics, State University of New York Oswego, Oswego, NY 13126, USA
Sukanta Deb
Affiliation:
Department of Physics, Cotton University, Panbazar, Guwahati 781001, Assam, India Space and Astronomy Research Center, Cotton University, Panbazar, Guwahati 781001, Assam, India
Susmita Das
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Eötvös Loránd Research Network (ELKH), Konkoly Thege Miklós út 15-17, H-1121, Budapest, Hungary
*
email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Pulsating variable δ Scuti stars are intermediate-mass stars with masses in the range of 1–3 δ and spectral types between A2 and F2. They can be found at the intersection of the Cepheid instability strip with the main sequence. They can be used as astrophysical laboratories to test theories of stellar evolution and pulsation. In this contribution, we investigate the observed period–colour and amplitude–colour (PCAC) relations at maximum/mean/minimum light of Galactic bulge and Large Magellanic Cloud δ Scuti stars for the first time and test the hydrogen ionization front (HIF)-photosphere interaction theory using the mesa-rsp code. The PCAC relations, as a function of pulsation phase, are crucial probes of the structure of the outer stellar envelope and provide insight into the physics of stellar pulsation and evolution. The observed behaviour of the δ Scuti PCAC relations is consistent with the theory of the interaction between the HIF and the stellar photosphere.

Keywords

starsvariablesdelta ScutiGalactic bulgeMagellanic Clouds
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S376: At the crossroads of astrophysics and cosmology: Period–luminosity relations in the 2020s , December 2022 , pp. 98 - 104
Check for updates
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Bhardwaj, A., Kanbur, S. M., Singh, H. P., Ngeow, C.-C., 2014, MNRAS, 445, 2655 CrossRefGoogle Scholar
Das, S., Bhardwaj, A., Kanbur, S. M., Singh, H. P., Marconi, M., 2018, MNRAS, 481, 2000 Google Scholar
Das, S., et al., 2020, MNRAS, 493, 29 Google Scholar
Deb, S., Singh, H. P., 2009, A&A, 507, 1729 Google Scholar
Deka, M., Deb, S., Kurbah, K., 2022a, MNRAS, 514, 3984 CrossRefGoogle Scholar
Deka, M., Kanbur, S. M., Deb, S., Das, S., Kurbah, K., Bellinger, E. P., Bhardwaj, A., 2022b, MNRAS, 517, 2251 Google Scholar
Gonzalez, O. A., Rejkuba, M., Zoccali, M., Valenti, E., Minniti, D., Schultheis, M., Tobar, R., Chen, B., 2012, A&A, 543, A13 Google Scholar
Haschke, R., Grebel, E. K., Duffau, S., 2011, AJ, 141, 158 Google Scholar
Kanbur, S. M., 1995, A&A, 297, L91 Google Scholar
Kanbur, S. M., Hendry, M. A., 1996, A&A, 305, 1 Google Scholar
Kanbur, S. M., Ngeow, C.-C., 2004, MNRAS, 350, 962 Google Scholar
Leys, C., Ley, C., Klein, O., Bernard, P., Licata, L., 2013, J. Exper. Soc. Psychol., 49, 764 Google Scholar
Nemec, J. M., Balona, L. A., Murphy, S. J., Kinemuchi, K., Jeon, Y.-B., 2017, MNRAS, 466, 1290 CrossRefGoogle Scholar
Ngeow, C.-C., Kanbur, S. M., Bhardwaj, A., Schrecengost, Z., Singh, H. P., 2017, ApJ, 834, 160 Google Scholar
Paxton, B., Bildsten, L., Dotter, A., Herwig, F., Lesaffre, P., Timmes, F., 2010, ApJS, 192, 3 CrossRefGoogle Scholar
Paxton, B., et al., 2013, ApJS, 208, 4 Google Scholar
Paxton, B., et al., 2015, ApJS, 220, 15 Google Scholar
Paxton, B., et al., 2018, ApJS, 234, 34 CrossRefGoogle Scholar
Paxton, B., et al., 2019, ApJS, 243, 10 Google Scholar
Pietrukowicz, P., et al., 2015, ApJ, 811, 113 Google Scholar
Poleski, R., et al., 2010, Acta Astron., 60, 1Google Scholar
Simon, N. R., Kanbur, S. M., Mihalas, D., 1993, ApJ, 414, 310 Google Scholar
Smolec, R., Moskalik, P., 2008, Acta Astron., 58, 193Google Scholar
Soszyński, I., et al., 2021, Acta Astron., 71, 189Google Scholar