Characterizing bright $δ$ Scuti pulsators using TESS lightcurves
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915800631214080 |
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| author | Mani, Prasad Bedding, Timothy R. Bernizzoni, Mara Murphy, Simon J. Hey, Daniel |
| author_facet | Mani, Prasad Bedding, Timothy R. Bernizzoni, Mara Murphy, Simon J. Hey, Daniel |
| contents | We present a study of bright, young $δ$ Scuti stars near the zero-age main sequence using TESS light curves and Gaia DR3 data. From a sample of 2041 stars with G<7 and $G_{BP}-G_{RP}$ colour in the range 0-0.6, we identified 444 $δ$ Scuti pulsators. We measured a pulsator fraction of ~70% in the middle of the instability strip, tapering off towards the edges. A period - luminosity diagram reveals a concentration along the fundamental mode and overtone ridges. We addressed sample completeness and identified low-frequency pulsators possibly exhibiting mixed modes. Cross-matching with nearby young associations showed that 63 $δ$ Scuti stars from our sample are association members. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_18589 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Characterizing bright $δ$ Scuti pulsators using TESS lightcurves Mani, Prasad Bedding, Timothy R. Bernizzoni, Mara Murphy, Simon J. Hey, Daniel Solar and Stellar Astrophysics We present a study of bright, young $δ$ Scuti stars near the zero-age main sequence using TESS light curves and Gaia DR3 data. From a sample of 2041 stars with G<7 and $G_{BP}-G_{RP}$ colour in the range 0-0.6, we identified 444 $δ$ Scuti pulsators. We measured a pulsator fraction of ~70% in the middle of the instability strip, tapering off towards the edges. A period - luminosity diagram reveals a concentration along the fundamental mode and overtone ridges. We addressed sample completeness and identified low-frequency pulsators possibly exhibiting mixed modes. Cross-matching with nearby young associations showed that 63 $δ$ Scuti stars from our sample are association members. |
| title | Characterizing bright $δ$ Scuti pulsators using TESS lightcurves |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2508.18589 |