Table B.1
The fractions of YSO with [3.6] and [4.5] band excess emissions in different SFRs.
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | |
| Distance | Age | YSO | DF | Limit | ||||||
| Name | (pc) | (Myr) | Ref. | Spt | criteria | Ref | (%) | (mag) | IRAC | |
|
|
||||||||||
| Taurus | 140 | 1.5 | (1) | ... | X, IR | (2) | 54 ± 8 | 9.4 | (2) | |
| IC 348 | 315 | 2.5 | (3) | B5 V | X, SP | (3) | 32 ± 6 | 11.5 | (3) | |
| NGC 2068/71 | 450 | 0.9 | (4) | B1.5 V | SP | (5) | 78 ± 16 | 11.3 | (4, 5) | |
| ONC | 450 | 1.0 | (6) | O6 V | X | (7) | 63 ± 4 | 11.6 | (8) | |
| OMC 2/3 | 450 | 3.0 | (9) | ... | X | (10) | 39 ± 6 | 11.9 | (8) | |
| Ori 1b | 440 | 5.0 | (11, 12) | O9.5 V | SP | (13) | 6 ± 2 | 12.8 | (13) | |
| 25 Ori | 330 | 8.0 | (11, 12) | B1 V | SP | (13) | 3 ± 2 | 12.6 | (13) | |
| λ Ori | 400 | 5.0 | (14) | O8 III | OP, IR, SP | (14) | 4 ± 3 | 12.6 | (14) | |
| NGC 7160 | 900 | 11.0 | (15) | B1 II-III | SP | (15) | 4 ± 2 | 15.0 | (16) | |
| Cep OB 3b | 725 | 2.5 | (17) | O7 V | X | (17) | 33 ± 5 | 13.0 | (17) | |
| Cep B+S155 | 725 | 1.5 | (17) | O7 V | X | (17) | 42 ± 11 | 13.4 | (17) | |
| NGC 2264 | 800 | 3.1 | (18) | O7 V | X, Hα, IR, Sp | (19) | 37 ± 3 | 13.6 | (19) | |
| NGC 2362 | 1480 | 5.0 | (20) | O9 Ib | X, IR, SP | (21) | 6 ± 2 | 15.5 | (21) | |
| Mon R2 | 830 | 2.0 | (22) | ... | X | (23) | 39 ± 6 | 13.4 | (8) | |
| NGC 2244 | 1400 | 2.0 | (24) | O5 V | X | (25) | 22 ± 4 | 14.5 | (8) | |
| NGC 6611 | 2000 | 1.0 | (26) | O5 V | X | (26) | 33 ± 3 | 14.8 | (27) | |
| Cha I | 165 | 2.6 | (28) | SP, IR | (29) | 50 ± 13 | 10.0 | (29) | ||
| σ Ori | 440 | 3.0 | (30) | O9.5 V | X, IR, SP, PM | (30, 31) | 25 ± 4 | 12.4 | (30) | |
| NGC 7129 | 1000 | 3.0 | (31) | ... | X | (32) | 29 ± 9 | 14.2 | (32) | |
| γ vel | 350 | 5.0 | (33) | WC | X, PM | (33) | 0.5 ± 0.4 | 12.3 | (33) | |
| Tr 37 | 900 | 4.0 | (15) | O6.5 V | SP, X | (15, 34) | 42 ± 5 | 14.2 | (16, 34) | |
Notes. Column 3: the median age of each SFR. Column 4: the references for the median age of each SFR. Column 5: the spectral types for the most massive star in each SFR. Column 6: the criteria for YSO selection. X: stars with X-ray emission, IR: stars with excess emission at infrared bands, Hα: Hα photometry, Sp: members confirmed by spectroscopy, PM: photometric members. Colomn 7: the references for YSO selections. Column 8: the fractions of stars with excess emissions in [3.6] and [4.5] bands. Column 9: H-band magnitude limit for a PMS star with a mass of 0.5 M⊙, and the corresponding age in each SFR, assuming a visual extinction of 3 mag. Column 10: the references for Spitzer IRAC data.
References. (1) Briceño et al. (2002); (2) Luhman et al. (2010); (3) Lada et al. (2006); (4) Fang et al. (2009); (5) Flaherty & Muzerolle (2008); (6) Hillenbrand (1997); (7) Getman et al. (2005); (8) this paper; (9) Peterson (2005); (10) Tsujimoto et al. (2002); (11) Briceño et al. (2005); (12) Briceño et al. (2007); (13) Hernández et al. (2007a); (14) Barrado y Navascués et al. (2007); (15) Sicilia-Aguilar et al. (2005); (16) Sicilia-Aguilar et al. (2006); (17) Getman et al. (2009); (18) Sung et al. (2004); (19) Sung et al. (2009); (20) Moitinho et al. (2001); (21) Currie et al. (2009); (22) Carpenter et al. (1997); (23) Kohno et al. (2002); (24) Park & Sung (2002); (25) Wang et al. (2008); (26) Guarcello et al. (2007); (27) GLIMPSE archive data; (28) Luhman (2004, 2007); (29) Luhman et al. (2008a); (30) Luhman et al. (2008b); (31) Hernández et al. (2007b); (32) Stelzer & Scholz (2009); (33) Hernández et al. (2008). (34) Mercer et al. (2009).
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