Table 1
Instrumental parameters and properties of the simulated sources for the S/N calculation of an Earth-like planet at 10 pc.
| Parameter | Value | Description |
|---|---|---|
| D | 2 m | Aperture diameter |
| t | 200 000 s | Integration time |
| ηQE | 0.7 | Quantum efficiency |
| ηt | 0.05 | Instrument throughput |
| FoV | λ/D | Field-of-view (~ 1″ @λ = 10 µm) |
| 4–18.5 µm | Wavelength range | |
| R | 20 | Spectral resolution (λ/∆λ)(a) |
| b | 15m | Nulling baseline(b) |
| r | 6 : 1 | Array baseline ratio |
| d | 10pc | Target distance |
| θp | 100mas | Planet–star separation |
| Rp | 1 R⊕ | Planet radius |
| Tp,0 | 285 K | Planet surface temperature(c) |
| Rs | 1 R⊙ | Stellar radius |
| Ts | 5778 K | Stellar effective temperature |
| λrel, β | 135°, 45° | Ecliptic coordinates |
| z | 3 | Level of exozodi emission(d) |
Notes. The table corresponds to Fig. 5. (a)Spectral resolution is assumed to be constant across the full wavelength range, such that the bin width, ∆λ, increases for larger wavelengths. For the parameters listed here, this results in 31 spectral bins. (b)The baseline is set according to Eq. (12) evaluated at 15 µm. (c)In Fig. 5, instead of assuming blackbody emission for the planet, we used the radiative transfer atmospheric model code petitRADTRANS to compute an MIR emission spectrum corresponding to an average cloud-free modern Earth spectrum (Konrad et al. 2022) (d)This value corresponds to the median of the best-fit nominal model derived from the HOSTS survey (Ertel et al. 2020).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.