Table 1
Main properties of HD 172555.
| Parameter | Unit | Value | References |
|---|---|---|---|
| RA | hh:mm:ss | 18:45:26.9019 | 1 |
| Dec | dd:mm:ss | −64:52:16.5417 | 1 |
| mV | mag | 4.77 | 2 |
| B-V | mag | 0.20 | 2 |
| d | pc | 28.8 | 1 |
| Teff | K | 7800 | 3,4 |
| log g | dex | 4.3 | 3,4 |
| [Fe/H] | dex | 0.07 | 3 |
| Sp. type | A7V | 5 | |
| Age | Myr | 15–25 | 6–10 |
| M★ | Μ⊙ | 1.7 | 4 |
| R★ | R⊙ | 1.55 | 4,11 (†) |
| L★ | L⊙ | 7.8 | 4 |
References. (1) Gaia Collaboration (2020); (2) Høg et al. (2000); (3) Erspamer & North (2003); (4) Riviere-Marichalar et al. (2012); (5) Gray et al. (2006); (6) Barrado y Navascués et al. (1999); (7) Zuckerman et al. (2001); (8) Binks & Jeffries 2014; (9) Mamajek & Bell (2014); (10) Miret-Roig et al. (2018); (11) this work. (†)We used a modified version of the infrared flux method (IRFM; Blackwell & Shallis 1977; Schanche et al. 2020), measuring a stellar radius of R★ = 1.550±0.012 R⊙. It agrees with the R★ = 1.56 R⊙ derived in Riviere-Marichalar et al. (2012). See Bonfanti et al. (2021) and Wilson et al. (2022) for details and application of the IRFM.
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