BD+44 493: Chemo-Dynamical Analysis and Constraints on Companion Planetary Masses from WIYN/NEID Spectroscopy
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| Natura: | Preprint |
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2024
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| author | Placco, Vinicius M. Gupta, Arvind F. Almeida-Fernandes, Felipe Logsdon, Sarah E. Rajagopal, Jayadev Holmbeck, Erika M. Roederer, Ian U. Della Costa, John Fernandez, Pipa Golub, Eli Higuera, Jesus Patel, Yatrik Ridgway, Susan Schweiker, Heidi |
| author_facet | Placco, Vinicius M. Gupta, Arvind F. Almeida-Fernandes, Felipe Logsdon, Sarah E. Rajagopal, Jayadev Holmbeck, Erika M. Roederer, Ian U. Della Costa, John Fernandez, Pipa Golub, Eli Higuera, Jesus Patel, Yatrik Ridgway, Susan Schweiker, Heidi |
| contents | In this work, we present high-resolution (R~100,000), high signal-to-noise (S/N~800) spectroscopic observations for the well-known, bright, extremely metal-poor, carbon-enhanced star BD+44 493. We determined chemical abundances and upper limits for 17 elements from WIYN/NEID data, complemented with 11 abundances re-determined from Subaru and Hubble data, using the new, more accurate, stellar atmospheric parameters calculated in this work. Our analysis suggests that BD+44 493 is a low-mass (0.83Msun) old (12.1-13.2Gyr) second-generation star likely formed from a gas cloud enriched by a single metal-free 20.5Msun Population III star in the early Universe. With a disk-like orbit, BD+44 493 does not appear to be associated with any major merger event in the early history of the Milky Way. From the precision radial-velocity NEID measurements (median absolute deviation - MAD=16m/s), we were able to constrain companion planetary masses around BD+44 493 and rule out the presence of planets as small as msin(i)=2MJ out to periods of 100 days. This study opens a new avenue of exploration for the intersection between stellar archaeology and exoplanet science using NEID. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_08943 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | BD+44 493: Chemo-Dynamical Analysis and Constraints on Companion Planetary Masses from WIYN/NEID Spectroscopy Placco, Vinicius M. Gupta, Arvind F. Almeida-Fernandes, Felipe Logsdon, Sarah E. Rajagopal, Jayadev Holmbeck, Erika M. Roederer, Ian U. Della Costa, John Fernandez, Pipa Golub, Eli Higuera, Jesus Patel, Yatrik Ridgway, Susan Schweiker, Heidi Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies In this work, we present high-resolution (R~100,000), high signal-to-noise (S/N~800) spectroscopic observations for the well-known, bright, extremely metal-poor, carbon-enhanced star BD+44 493. We determined chemical abundances and upper limits for 17 elements from WIYN/NEID data, complemented with 11 abundances re-determined from Subaru and Hubble data, using the new, more accurate, stellar atmospheric parameters calculated in this work. Our analysis suggests that BD+44 493 is a low-mass (0.83Msun) old (12.1-13.2Gyr) second-generation star likely formed from a gas cloud enriched by a single metal-free 20.5Msun Population III star in the early Universe. With a disk-like orbit, BD+44 493 does not appear to be associated with any major merger event in the early history of the Milky Way. From the precision radial-velocity NEID measurements (median absolute deviation - MAD=16m/s), we were able to constrain companion planetary masses around BD+44 493 and rule out the presence of planets as small as msin(i)=2MJ out to periods of 100 days. This study opens a new avenue of exploration for the intersection between stellar archaeology and exoplanet science using NEID. |
| title | BD+44 493: Chemo-Dynamical Analysis and Constraints on Companion Planetary Masses from WIYN/NEID Spectroscopy |
| topic | Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2410.08943 |