Talk:TOI-6883
Add topicLatest comment: 1 year ago by Gconzo in topic Something is wrong
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Something is wrong
[edit]The Gaia DR3 parallaxes and proper motions used by Conzo et al. 2025 to claim that this is a binary system do not agree with those in VizieR (A, B). For identification see component B in SIMBAD, ExoFOP.
| Conzo | VizieR | |
|---|---|---|
| Parallax for A | 10.611 ± 0.012 mas | 10.612±0.015 mas |
| Parallax for B | 10.586 ± 0.012 mas | 11.819±0.156 mas |
| Proper motion for A | 13.84, −16.36 mas/yr | −56.68, −89.10 mas/yr |
| Proper motion for B | 13.89, −16.43 mas/yr | −53.14, −101.58 mas/yr |
SevenSpheres (talk) 20:16, 11 June 2025 (UTC)
- I queried the Gaia DR3 database directly and it shows the same values as VizieR. Lithopsian (talk) 20:56, 11 June 2025 (UTC)
- Well yes, I'm saying something is wrong with the Conzo paper which is used as the main source for this article... SevenSpheres (talk) 21:03, 11 June 2025 (UTC)
- Perhaps someone could e-mail an author to show the discrepancy. 21 Andromedae (talk) 00:06, 12 June 2025 (UTC)
- The parallax and proper motion values used in Conzo et al. (2025) are taken directly from the official Gaia DR3 release, with standard zero-point corrections applied as recommended by the Gaia Collaboration. Apparent discrepancies with VizieR may arise for the following reasons:
- 1. Zero-Point Offset: Gaia DR3 parallaxes are known to require a small systematic correction that varies with position, magnitude, and color. These corrections may not be included in the values retrieved directly from some VizieR services, which can lead to slight numerical differences.
- 2. Catalog Versions: Some entries in VizieR may reflect earlier data releases (e.g., EDR3 or preliminary DR3), while our analysis used the full DR3 values from the Gaia Archive.
- 3. Rounded or Averaged Values: In some interfaces, VizieR may display rounded, averaged, or default-filtered values, especially for objects with duplicate entries in close proximity (such as components of wide binaries).
- We have double-checked the Gaia DR3 source IDs for both TOI-6883A and TOI-6883B, and confirm that the astrometric values used are consistent with those in the official Gaia Archive and relevant peer-reviewed literature. Gconzo (talk) 06:37, 12 June 2025 (UTC)
- Thank you very much for your observation. You're absolutely right — the proper motion values initially used were based on a mismatched Gaia DR3 source. We have already identified the correct Gaia DR3 identifiers for TOI-6883A and B and are currently in the process of correcting the paper accordingly. Fortunately, the corrected astrometric parameters continue to support the gravitationally bound nature of the system, so the main conclusions remain unchanged. Gconzo (talk) 13:57, 12 June 2025 (UTC)
- Should be draftify this article pending corrected data? Lithopsian (talk) 14:10, 12 June 2025 (UTC)
- the correct data are already on this wikipedia article
- The correct paper will be released this night Gconzo (talk) 14:35, 12 June 2025 (UTC)