Table 1
Properties of the companions of our sample.
| Target | d(pc) | SpT star | Age | ρ (′′ ) | Mass (MJup ) | SpT comp. | Teff (K) | logg | Evid. CSD | References | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| HR 8799 b | 41.2 | A5 |  |
Myr | 1.7 | 5.8 ± 0.5 | ~L/T | 1175 ± 125 | ~3.5 | – | 1,2,3 |
| HR 8799 c | 41.2 | A5 |  |
Myr | 0.9 |  |
~L/T | 1225 ± 125 | 3.5 – 3.9 | – | 1, 2, 3 |
| HR 8799 d | 41.2 | A5 |  |
Myr | 0.7 |  |
L7 ± 1 | 1200 ± 100 | 3.0 – 4.5 | – | 1, 2, 3 |
| HR 8799 e | 41.2 | A5 |  |
Myr | 0.4 |  |
L7 ± 1 | 1150 ± 50 | 4.3 ± 0.3 | – | 1, 2, 3, 4 |
| PZ Tel B | 47.0 | G9 | 21 ± 4 | Myr | 0.5 | 38 – 72 | M7 ± 1 | 2700 ± 100 | <4.5 | – | 5, 6 |
| HR 7672 B | 17.7 | G0 |  |
Gyr | 0.8 |  |
L4.5 ± 1.5 | 1510 – 1850 | 5.0 – 5.5 | – | 7, 8, 9, 10 |
| GSC 8047 B | 86.0 | K2 | ~30 | Myr | 3.2 |  |
M9.5 ± 0.5 | 2200 ± 100 | 4.0 ± 0.5 | – | 5, 11, 12, 13 |
| HD 19467 B | 32.0 | G3 | 10 ± 1 | Gyr | 1.6 |  |
T5.5 ± 1 |  |
~5 | – | 14, 15, 16 |
| GQ Lup B | 151.2 | K7 | 2 – 5 | Myr | 0.7 | ~10 – 40 | L1 ± 1 | 2400 ± 100 | 4.0 ± 0.5 | H, N | 17, 18, 19, 20 |
| HD 206893 B | 40.8 | F5 |  |
Myr | 0.3 | 15 – 40 | L3 – L5 | 1300 – 1700 | 3.5 – 5.0 | – | 7, 21, 22 |
| HD 4747 B | 18.8 | G9 | 11 ± 7 | Gyr | 0.6 |  |
T1 ± 2 |  |
 |
– | 15, 23, 24 |
| CD-35 2722 B | 22.4 | M1 | 100 ± 50 | Myr | 3.1 | 31 ± 8 | L4 ± 1 | 1700 – 1900 | 4.5 ± 0.5 | – | 5, 25 |
| AB Pic b | 50.0 | K1 | ~30 | Myr | 5.5 |  |
L0 ± 1 |  |
4.5 ± 0.5 | – | 5, 13, 26, 27 |
| HD 106906 b | 103.0 | F5 | 13 ± 2 | Myr | 7.1 | 12.5 ± 1.5 | L1.5 ± 1.0 | 1820 ± 240 | ~3.5 | N, P | 28, 29, 30 |
| GSC 6214 B | 108.5 | K5 |  |
Myr | 2.2 | 14.5 ± 2.0 | M9.5 ± 1 | 2200 ± 100 | … | H, N, M | 19, 31 |
| PDS 70 b | 113.0 | K7 | 5.4 ± 1.0 | Myr | 0.2 | ~10 | ~L | 1500 – 1600 | ~4 | H | 32, 33, 34, 35, 36 |
| 1RXS J1609 B | 139.1 | M0 | ~10 | Myr | 2.2 | 14.0 ± 1.5 | L2 ± 1 | 2000 ± 100 | ~4 | N, M, AV | 19, 37, 38 |
| DH Tau B | 134.8 | M1 | ~2 | Myr | 2.3 |  |
M9.25 ± 0.25 | 2400 ± 100 | 3.5 ± 0.5 | H, N | 13, 19, 39 |
| β Pic b | 19.7 | A6 |  |
Myr | 0.3 | 13 ± 3 | L2 ± 1 | 1694 ± 40 |  |
– | 40, 41, 42, 43, 44 |
| TYC 8998 b | 94.6 | K3 | 16.7 ± 1.4 | Myr | 1.7 | 14 ± 3 | ~L0 |  |
 |
– | 32, 45 |
Notes. d is the distance from Earth, SpT stands for spectral type, ρ is the approximate angular separation of the companion from the host star at the time of observation, Teff is the effective temperature, and logg is the surface gravity. The second column from the right indicates the evidence for the existence of a circumsubstellar disk (CSD), which includes hydrogen emission lines (H), red near-infrared colors (N), excess emission at mid-infrared wavelengths (M), a radially extended point spread function in Hubble Space Telescope images (P), and significant extinction by dust (AV ). HR 7672 B, HD 19467 B, HD 4747 B, and β Pic b have also been observed by Jensen-Clem et al. (2020). References. Distances from Gaia DR2 (Gaia Collaboration 2018; Bailer-Jones et al. 2018). Other properties from: (1) Gray et al. (2003), (2) Wang et al. (2018), (3) Bonnefoy et al. (2016), (4) GRAVITY Collaboration (2019), (5) Torres et al. (2006), (6) Maire et al. (2016a), (7) Gray et al. (2006), (8) Crepp et al. (2012), (9) Liu et al. (2002), (10) Boccaletti et al. (2003), (11) Chauvin et al. (2005a), (12) Ginski et al. (2014), (13) Bonnefoy et al. (2014), (14) Crepp et al. (2014), (15) Wood et al. (2019), (16) Crepp et al. (2015), (17) Kharchenko & Roeser (2009), (18) Donati et al. (2012), (19) Wu et al. (2017a) and references therein, (20) Wu et al. (2017b) and references therein, (21) Delorme et al. (2017), (22) Milli et al. (2017), (23) Montes et al. (2001), (24) Crepp et al. (2018), (25) Wahhaj et al. (2011), (26) Bonnefoy et al. (2010), (27) Chauvin et al. (2005b), (28) Houk & Cowley (1975), (29) Kalas et al. (2015), (30) Daemgen et al. (2017), (31) Pearce et al. (2019), (32) Pecaut & Mamajek (2016), (33) Müller et al. (2018), (34) Keppler et al. (2018), (35) Christiaens et al. (2019), (36) Haffert et al. (2019), (37) Rizzuto et al. (2015), (38) Wu et al. (2015), (39) Herbig (1977), (40) Gray et al. (2006), (41) Miret-Roig et al. (2020), (42) Stolker et al. (2020), (43) Chilcote et al. (2017), (44) Dupuy et al. (2019), (45) Bohn et al. (2020).
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