Exoplanets with ELT-METIS - I. Estimating the direct imaging exoplanet yield around stars within 6.5 parsecs

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Volume 653 (September 2021)

A&A, 653 (2021) A8

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Table 1.

Candidate stars examined in this work.

Star	Spec.	m_K	m_L	m_M	m_N2
Sirius	A1V ⁽¹⁾	−1.35 ⁽²⁾	−1.38	−1.34	−1.31
Altair	A7V ⁽¹⁾	0.24 ⁽²⁾	0.21	0.24	0.27
Procyon	F5IV-V ⁽³⁾	−0.65 ⁽²⁾	−0.68	−0.65	−0.63
α Cen A	G2V ⁽⁴⁾	−1.49 ⁽²⁾	−1.52	−1.47	−1.48
e Eri	G6V ⁽⁶⁾	2.53 ⁽²⁾	2.50	2.56	2.54
del Pav	G8IV ⁽⁵⁾	2.04 ⁽²⁾	2.01	2.07	2.05
τ Ceti	G8V ⁽⁶⁾	1.68 ⁽²⁾	1.65	1.71	1.69
Omi02 Eri	K0V ⁽⁶⁾	2.41 ⁽²⁾	2.38	2.44	2.42
70 Oph	K0V ⁽⁶⁾	1.79 ⁽²⁾	1.76	1.82	1.80
α Cen B	K1V ⁽⁴⁾	−0.60 ⁽²⁾	−0.63	−0.57	−0.59
36 Oph A	K2V ⁽⁴⁾	2.95 ^{(4), ( * )}	2.92	2.99	2.95
36 Oph B	K2V ⁽⁴⁾	1.84 ^{(7), ( * )}	1.84	1.91	1.88
ϵ Eri	K2V ⁽⁶⁾	1.67 ⁽²⁾	1.64	1.71	1.68
HD 191408	K2.5V ⁽⁵⁾	3.05 ^{(8), ( * )}	3.01	3.09	3.05
70 Oph B	K4V ⁽⁹⁾	3.34 ^{(7), ( * )}	3.30	3.37	3.33
HD 131977	K4V ⁽⁶⁾	3.10 ⁽²⁾	3.06	3.13	3.09
ϵ Indi	K5V ⁽⁴⁾	2.24 ⁽¹⁰⁾	2.20	2.27	2.22
V2215 Oph	K5V ⁽⁴⁾	3.47 ⁽¹⁰⁾	3.42	3.50	3.45

η Cas	F9V ⁽¹¹⁾	1.99 ⁽²⁾	1.96	2.00	2.00
σ Dra	K0V ⁽⁶⁾	2.83 ⁽¹²⁾	2.80	2.86	2.84
HD 219134	K3V ⁽⁶⁾	3.25 ⁽²⁾	3.22	3.29	3.25
61 Cyg A	K5V ⁽⁶⁾	2.68 ⁽¹²⁾	2.64	2.71	2.67

Notes. The list of the 18 ELT candidates with spectral type, apparent K magnitude, and calculated magnitudes. L, M, and N2 magnitudes are calculated from the given K magnitude and spectral type following the work of Pecaut & Mamajek (2013). The top four new candidates for a theoretical northern hemisphere survey at a Hawaii or La Palma site are also given (see Sect. 2.3 for details) following the dividing line. σ Draconis is only visible from La Palma site. Both northern sites can also see Procyon and Altair but only the Hawaii site can see Sirius. ^( * )Converted from a V band magnitude from the given source.

References. (1) Gray et al. (2003); (2) Ducati (2002); (3) Skiff (2013); (4) Torres et al. (2006); (5) Gray et al. (2006); (6) Keenan & McNeil (1989); (7) Fabricius et al. (2002); (8) Zacharias et al. (2012); (9) Cowley et al. (1967); (10) Cutri et al. (2003); (11) Abt (2008); (12) van Belle & von Braun (2009).

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