A Proposal for Enhancing Technosignature Search toward the Galactic Center
We discuss the possibility of enhancing intelligent life searches toward the Galactic center. From the clockwork orbital motions of stars around the Sgr A* black hole, we can determine the distance to the Galactic center at an exceptional accuracy, despite its remoteness ∼8.3 kpc. In addition, we ca...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad2a48 |
| _version_ | 1797253776812277760 |
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| author | Naoki Seto |
| author_facet | Naoki Seto |
| author_sort | Naoki Seto |
| collection | DOAJ |
| description | We discuss the possibility of enhancing intelligent life searches toward the Galactic center. From the clockwork orbital motions of stars around the Sgr A* black hole, we can determine the distance to the Galactic center at an exceptional accuracy, despite its remoteness ∼8.3 kpc. In addition, we can define precise reference epochs by selecting a prominent object such as the bright B-type star S2. These properties have a particular affinity for the coordinated signaling scheme that was hypothesized by Seto for systematically connecting intentional senders to searchers without a prior communication. If S2 is actually being used as a common reference clock, we can compress the search directions around the Galactic center by more than 2 orders of magnitude, with the scanning interval of ∼16 yr. |
| first_indexed | 2024-04-24T21:39:26Z |
| format | Article |
| id | doaj.art-72e96963d8e34c56a19e740e024c1ae4 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-04-24T21:39:26Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-72e96963d8e34c56a19e740e024c1ae42024-03-21T09:01:28ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01964210510.3847/1538-4357/ad2a48A Proposal for Enhancing Technosignature Search toward the Galactic CenterNaoki Seto0https://orcid.org/0000-0001-6521-4235Department of Physics, Kyoto University , Kyoto 606-8502, Japan ; seto@tap.scphys.kyoto-u.ac.jpWe discuss the possibility of enhancing intelligent life searches toward the Galactic center. From the clockwork orbital motions of stars around the Sgr A* black hole, we can determine the distance to the Galactic center at an exceptional accuracy, despite its remoteness ∼8.3 kpc. In addition, we can define precise reference epochs by selecting a prominent object such as the bright B-type star S2. These properties have a particular affinity for the coordinated signaling scheme that was hypothesized by Seto for systematically connecting intentional senders to searchers without a prior communication. If S2 is actually being used as a common reference clock, we can compress the search directions around the Galactic center by more than 2 orders of magnitude, with the scanning interval of ∼16 yr.https://doi.org/10.3847/1538-4357/ad2a48Search for extraterrestrial intelligenceAstrobiologyGalactic center |
| spellingShingle | Naoki Seto A Proposal for Enhancing Technosignature Search toward the Galactic Center The Astrophysical Journal Search for extraterrestrial intelligence Astrobiology Galactic center |
| title | A Proposal for Enhancing Technosignature Search toward the Galactic Center |
| title_full | A Proposal for Enhancing Technosignature Search toward the Galactic Center |
| title_fullStr | A Proposal for Enhancing Technosignature Search toward the Galactic Center |
| title_full_unstemmed | A Proposal for Enhancing Technosignature Search toward the Galactic Center |
| title_short | A Proposal for Enhancing Technosignature Search toward the Galactic Center |
| title_sort | proposal for enhancing technosignature search toward the galactic center |
| topic | Search for extraterrestrial intelligence Astrobiology Galactic center |
| url | https://doi.org/10.3847/1538-4357/ad2a48 |
| work_keys_str_mv | AT naokiseto aproposalforenhancingtechnosignaturesearchtowardthegalacticcenter AT naokiseto proposalforenhancingtechnosignaturesearchtowardthegalacticcenter |