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Table 4

Hα emission-line stars in the Gulf of Mexico.

MKHα Alt. Namea α(2000) δ(2000) V R I Jb Hb Ksb W(2002)c W(1998)c
1 20 57 41.8 +43 49 54 20.85 19.37 – 13.97 13.16 12.86 9
2 L III-1 20 57 48.9 +43 50 24 17.17 16.18 – 12.56 11.96 11.73 12
3 L II-114 20 57 57.5 +43 50 10 17.82 16.85 16.28 13.84 13.14 12.91 7
4 20 57 59.5 +43 51 23 22.17 20.75 18.94 15.70 14.78 14.34 8
LkHα 185 20 57 59.9 +43 53 26 16.22 15.08 14.60 11.85 10.87 10.25 + 219
5 L II-122 20 58 06.1 +43 49 34 18.32 17.28 16.39 13.89 13.12 12.78 46
6 20 58 06.2 +43 53 01 17.93 16.74 15.95 13.41 12.58 12.21 29
HBC 721 20 58 07.6 +43 52 53 20.55 18.90 17.52 14.10 12.79 11.98 + 50
7 20 58 11.1 +43 53 04 22.86 20.97 18.66 14.79 13.86 13.38 13 –
8 20 58 11.4 +43 52 58 16.63 16.43 16.14 13.75 12.21 11.21 + 104 97
9 20 58 14.3 +43 53 05 20.89 19.44 17.53 14.17 13.39 12.94 35 45
10 20 58 16.1 +43 53 37 21.22 19.38 17.43 13.46 11.33L 10.58L 25 26
G5 20 58 16.3 +43 53 35 20.24 18.53 16.94 13.03 11.21L 10.42L 17 22
G4 20 58 17.0 +43 53 43 19.09 17.67 16.55 13.25 12.21 11.46 + 69 68
11 20 58 17.1 +43 53 36 21.77 20.15 18.00 14.09L 13.00L 12.96 13 22
G3 * 20 58 17.9 +43 53 44 18.58 16.84 15.48 11.77 10.42 9.70 29 11
12 20 58 18.4 +43 52 48 23.47 22.02 19.53 15.63 14.91 14.32 + 4 –
G2 20 58 18.5 +43 53 47 20.53 18.75 17.08 13.21L 12.18 11.39 26 30
13 20 58 18.6 +43 53 49 21.83 19.90 18.30 13.39L 12.76 11.96 5 9
G1 * 20 58 19.5 +43 53 45 19.34 17.65 16.18 12.62 11.35 10.84 7 –
14 * 20 58 19.6 +43 53 48 22.71 20.58 18.90 – – – 5 15
15 20 58 19.6 +43 54 00 21.70 20.13 18.08 13.79L 13.69 13.29 4 –
LkHα 186 20 58 19.6 +43 53 55 18.12 16.68 15.85 12.69 11.49 10.92 30 33
16 20 58 20.1 +43 53 17 23.30 21.60 19.49 15.93 14.85 14.48 7 –
LkHα 187 20 58 21.6 +43 53 45 18.56 17.05 16.00 12.80 11.49 10.71 + 162 40
17 20 58 21.7 +43 53 31 22.40 20.62 18.17 13.77 12.36 11.80 9 –
18 20 58 23.3 +43 53 51 – 22.27 18.10 15.82 14.88 14.41 6 nc
19 20 58 23.3 +43 52 59 17.81 16.62 15.65 12.77 11.81 11.34 40 25
20 20 58 23.7 +43 52 56 18.30 16.98 15.87 12.87 12.07 11.74 24 12
21 20 58 23.9 +43 52 57 18.62 17.29 16.06 – – – 10 4
LkHα 188 20 58 23.8 +43 53 12 14.65 13.69 13.37 10.56 9.62 8.84 + 98 28
LkHα 189 20 58 24.0 +43 53 55 17.10 15.80 15.03 12.23 11.16 10.69 92 29
22 20 58 24.4 +43 53 15 20.79 19.56 18.31 – – – 15 –
23 20 58 25.6 +43 53 29 19.58 18.11 16.81 13.60 12.40 11.73 46 37
24 20 58 27.1 +43 53 20 19.54 18.20 17.26 14.02 12.92 12.25 + 144 45
25 20 58 27.3 +43 54 55 23.65 21.81 19.98 15.87 15.03 14.40 + 6 nc
26 20 58 27.4 +43 53 24 23.60 21.78 19.86 16.08 15.03 14.34 + 5 –
27 20 58 27.5 +43 53 58 22.80 21.51 19.41 15.28 14.32 13.79 3 15
28 20 58 30.4 +43 53 59 19.87 18.61 17.41 14.82 13.67 12.89 + 70 42
29 20 58 30.5 +43 54 10 20.68 19.20 17.63 13.79 12.84 12.41 69 17
30 20 58 31.2 +43 53 58 19.10 17.78 16.63 15.33 14.04 13.29 4 5

Notes.  ∗ Visual binaries. + Stars with infrared excess in the JKH color–color diagram (Fig. 15).

(a)

LkHα numbers from Herbig (1958); G numbers from Cohen & Kuhi (1979); HBC number from Herbig & Bell (1988); L numbers from Laugalys et al. (2006), with possible Hα emission.

(b)

JHKs magnitudes extracted from the 2MASS All-Sky Catalog. All magnitudes marked L are upper limits.

(c)

Hα equivalent widths measured in 2002 and 1998 images. nc means Hα emission with no or very faint continuum.

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