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Home All issues Volume 500 / No 3 (June IV 2009) A&A, 500 3 (2009) 1045-1063 Full HTML
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Table 4:

Derived physical parameters for known, non-saturated members of Lupus 1, 3, and 4.
Object $T_{\rm eff}$ L AV M Age Other names Memb. Sp. type Sp. type Notes
(SSTc2dJ) (K) ($L_\odot$) (mag) ($M_\odot $) (Myr)   Ref.   Ref.  
Lupus 1
153928.3-344618 3100 0.8 0.2 0.200 1.0 Sz 66 m1 M3 s1  
154457.9-342340 3000 0.02 0.3 0.075 4.0 #19 m2      
154518.5-342125 2700 0.09 1.6 - <1.0   m3      
154517.4-341829 4600 0.6 4.6 1.0 22 HW Lup m1 M1 s1 20
154508.9-341734 4600 0.7 8.9 1.1 20   m3      
154240.3-341343 3900 1.8 8.7 1.2 1.1   m3      
154214.6-341026 4000 0.01 7.5 - -   m3     1
154140.8-334519 2800 0.005 0.9 0.040 8.0 #18 m2 M8/M5.75 s2/s3  
153803.1-331358 3500 2.3 4.2 - <1.0   m3      
Lupus 3
161218.5-393418 4000 0.024 3.6 -     m4     1, 34
160917.1-392710 2900 0.021 0.5 0.055 2.2 Lup 710s m5 M5 s7  
160901.4-392512 4000 0.28 2.6 0.900 12.8   m3     2
160758.9-392435 3000 0.058 0.9 0.130 2.3 Lup 714 m5 M5 s7 29
160837.3-392311 10000 0.38 9.6 - - Lup 706 m5 L0 s7 1, 3
161029.6-392215 3300 0.11 1.1 0.300 4.0   m3      
160737.7-392139 3100 0.038 1.7 0.130 4.0 Lup 713s m5 M5.75 s4  
161012.2-392118 3300 0.67 1.1 0.450 1.0 Sz 121 m1 M3 s1  
160754.1-392046 3100 2.2 3.4 - <1   m3      
160942.6-391941 5400 1.5 3.5 - - Sz 116 m1 M1.5 s1 1, 21, 33
160754.7-391545 4400 0.0069 6.4 - -   m6     1, 4, 28, 36
160853.2-391440 3900 0.44 3.3 0.950 6.4   m6      
160853.7-391437 4000 0.064 8.4 0.600 159.9   m6 M5 s4  
160708.6-391407 4400 0.078 7.1 - -   m3     1, 3, 35, 36
160934.1-391342 3500 10.3 6.4 - <1   m3      
160944.3-391330 3700 0.47 1.5 0.750 3.2 Sz 117 m1 M2 s1  
160806.2-391223 3900 5.1 8.1 - <1   m6      
160954.5-391204 4400 0.17 4.4 - - Lup 810s m5     1, 7
161126.0-391123 3800 17.0 8.2 - <1   m3     36
160948.6-391117 4800 4.3 8.9 1.400 11.3 Sz 118 m1 K6 s1 36
160703.9-391112 3600 0.016 2.4 - -   m3     1, 8
160710.1-391104 3900 1.1 3.2 1.000 1.4 Sz 90 m1 K7-M0 s1  
160848.2-390920 2800 0.036 0.2 0.060 1.0 Lup 617 m5 M6 s7  
160906.2-390852 3100 0.17 0.4 0.175 1.0 Sz 115 m1 M4 s1  
160812.6-390834 4000 0.93 2.4 1.100 2.9 Sz 96 m1 M1.5 s1 36
161138.6-390828 4400 0.37 6.1 0.950 25.2 Lup 831s m5      
161016.4-390805 4800 0.62 1.8 0.950 35.6   m3      
160908.0-390726 4000 0.066 13.6 - -   m7     22, 32, 36
160755.3-390718 3900 9.9 12.3 - <1   m3      
161035.0-390655 3600 2.7 7.1 - <1   m3      
161001.3-390645 3200 0.22 4.4 0.250 1.1   m6     9
160839.8-390625 4600 0.59 5.5 1.050 22.4 Sz 106 m1 M2.5 s5 10, 36
160830.3-390611 3000 0.17 0.3 0.150 1.3 Sz 103 m1 M4 s1  
160825.8-390601 2900 0.24 0.5 - <1 Sz 100 m1 M5 s5  
160902.4-390549 4600 0.0079 4.4 - -   m7     1, 11, 36
160824.0-390549 7200 1.4 6.1 - - Sz 99 m1 M3.5 s1 1
160830.8-390549 3000 0.13 0.4 0.150 1.3 Sz 104 m1 M5 s1  
160849.4-390539 4400 1.0 6.0 1.400 5.7 Par-Lup3-3 m8 M4.5 s5 27
160828.4-390532 2900 0.39 0.2 - <1 Sz 101 m1 M4 s1  
160851.4-390530 4400 0.021 5.3 - - Par-Lup3-4 m8 M5 s5 1, 3, 5, 36
160901.8-390513 2900 0.42 0.7 - <1 Sz 114 m1 M5.5 s5  
160723.4-390510 4800 0.0098 3.2 - - Lup 654 m5 L1 s7 1
160847.5-390509 4600 0.0086 5.7 - -   m6     1
160858.9-390446 4400 0.0056 5.9 - -   m7     1, 22
160749.6-390429 3400 0.15 0.2 0.300 2.5 Sz 94 m1 M4 s1  
160828.2-390425 4400 0.0097 9.5 - -   m7     1, 22, 30, 36
160821.8-390422 3200 0.19 0.3 0.250 1.3 Sz 97 m1 M3 s1  
160848.2-390419 2800 0.14 0.2 - <1 Sz 109 m1 M6.5 s5  
160853.7-390410 4400 0.0047 3.2 - -   m7     1, 14, 31
160835.8-390348 3100 0.18 0.4 0.175 1.0 Par-Lup3-2 m8 M6 s5  
160711.6-390348 5400 1.2 4.3 - - Sz 91 m1 M0.5 s1 24
160908.5-390343 3000 0.071 0.3 0.130 1.8 Lup 608s m5 M5 s7  
160851.6-390318 4400 0.5 1.6 1.050 20.0 Sz 110 m1 M4.5 s5 25
160829.7-390311 4400 0.020 1.0 - - Sz 102 m1 K0: s1 1, 3, 19, 36
160816.0-390304 2800 0.080 2.0 - <1 Par-Lup3-1 m8 M7.5 s5  
160800.2-390300 2900 0.085 0.7 0.100 1.3 Lup 604s m5 M5.25 s4  
160855.5-390234 3000 0.24 0.4 - <1 Sz 112 m1 M6 s5  
161027.4-390230 3700 0.0048 4.5 - -   m3     1
160857.8-390223 3100 0.079 1.4 0.110 1.1 Sz 113 m1 M6 s5  
160841.8-390137 3000 0.18 0.4 0.150 1.3 Sz 107 m1 M5.5 s1  
160956.3-385952 2800 0.035 0.5 0.060 1.0 Lup 818s m5 M6 s7  
160957.1-385948 3100 0.41 0.3 - <1 Sz 119 m1 M4 s1  
160752.3-385806 3400 0.26 0.7 0.350 1.6 Sz 95 m1 M1.5 s1  
160815.0-385715 4000 0.019 4.1 - -   m6 M4.75 s4 1
160859.5-385628 2600 0.017 1.5 - <1   m6 M8 s4  
161045.4-385455 4400 0.030 2.7 - -   m3     1
161000.1-385401 2400 2.1 4.0 - -   m3     15
161051.6-385314 3900 0.40 2.1 0.900 6.4 Sz 123 m1 M3 s1  
160714.0-385238 2700 0.011 0.3 0.040 3.2 Lup 605 m5 M6.5 s7  
160803.0-385229 3300 1.92 2.9 - <1   m3      
161151.2-385104 3000 0.029 0.4 0.070 2.5 Lup 802s m5 M4 s2  
160949.9-384903 2900 0.0041 0.8 0.050 12.6 Lup 650 m5 M4 s7  
160855.3-384848 2900 0.037 0.7 0.072 1.0   m6      
161013.1-384617 3500 0.0050 1.5 - -   m3     1, 16, 36
161219.6-383742 3400 5.7 4.8 - <1   m3      
160927.0-383628 5200 0.37 5.2 - -   m4     1, 3
161018.6-383613 2900 0.045 0.2 0.080 1.1   m3      
161019.8-383607 2700 0.024 0.2 0.040 1.1   m3      
161144.9-383245 2800 0.057 0.5 0.060 1.0   m3      
161211.2-383220 4400 1.0 7.0 1.400 5.7   m3     36
161159.8-382339 3100 0.084 0.9 0.110 1.0 SST-Lup3-1 m9 M5.75 s6  
161148.7-381758 4600 0.045 1.7 - -   m3     1, 17
161243.8-381503 4400 0.60 1.0 1.150 12.7   m3      
161131.9-381110 4400 0.31 4.5 0.850 39.9   m3      
161204.5-380959 4400 0.0056 3.6 - -   m3     1, 3
161344.1-373646 3400 0.056 1.0 0.400 20.1   m4      
Lupus 4
160002.4-422216 5000 0.42 4.6 - -   m3     1
160000.6-422158 3400 0.080 0.8 0.350 8.9   m3      
160129.7-420804 4000 0.65 4.8 1.100 5.7   m3      
160026.1-415356 3000 0.065 0.6 0.130 2.0   m3      
160229.9-415111 3400 0.32 5.3 0.350 1.1   m3      
160031.1-414337 3900 0.26 1.7 0.900 17.9 Sz 130 m1 M1.5 s1  
160329.4-414003 4400 0.36 5.8 0.950 25.2 Sz 133 m1 K2 s1 26, 36
160111.6-413730 3600 0.53 3.6 0.700 2.2   m3      
160143.3-413606 3500 0.66 3.0 0.620 1.1   m3      
160049.4-413004 4000 0.15 1.9 0.750 39.8 Sz 131 m1 M2 s1 36
Membership references:
m1: Schwartz (1977); m2: Allers et al. (2006); m3: Merín et al. (2008); m4: Chapman et al. (2007); m5: López Martí et al. (2005); m6: Allen et al. (2007); m7: Nakajima et al. (2000); m8: Comerón et al. (2003); m9: Merín et al. (2007).
Spectral type references:

s1: Hughes et al. (1994); s2: Jayawardhana & Ivanov (2006); s3: Luhman et al. (2007); s4: Allen et al. (2007); s5: Comerón et al. (2003); s6: Merín et al. (2007); s7: López Martí et al. (2005)

Notes:
1: Apparently below the main sequence
2: Merín et al. (2008) fit a spectral type corresponding to a cooler temperature, with no extinction, and derive a lower luminosity that yields an unusually high disk-to-star luminosity ratio, $L_{\rm disk} / L_*$ ratio. Our results, involving moderate extinction, imply $L_{\rm disk} / L_* = 0.36$, closer to typical values among the Lupus 3 population.
3: Unreliable fit probably due to veiling. See Table 6.
4: Important K excess in addition to veiling. No fit in Merín et al. (2008).
5: Well known to apparently lie below the main sequence despite its M 5 spectral type. Variability reported by (Comerón et al. 2003).
7: Fit as M5 in Merín et al. (2008); close companion at 2''4, probably contaminating the photometry confusion.
8: No fit in Merín et al. (2008).
9: Fit much later than in Merín et al. (2008)
10: Highly variable.
11: Candidate member in Nakajima et al. (2000). Variability suspected. A comparison with 2MASS photometry shows it to be fainter in J, H by 0.12 and 0.16 mag respectively, and brighter in Ks by 0.15 mag, in the observations of Nakajima et al. (2000).
14: Variability suspected. A comparison with 2MASS photometry shows it to be brighter in J by 0.26 mag, and slightly fainter in HKs by 0.07 mag.
15: Fitted by Merín et al. (2008) as A0 with very high extinction, which seems unlikely because it sits in a low extinction region. It may be a background red giant instead.
16: Strong K excess. No fit in Merín et al. (2008).
17: Relatively blue spectral energy distribution, the fit seems reasonable. Hints of elongation; perhaps having a disk close to edge-on orientation.
19: Sz 102 is a peculiar object with strong emission lines, veiling and underluminous.
20: Very strong H$\alpha$ emission reported by Hughes et al. (1994), possibly veiled.
21: Our measured $I_{\rm C}$ is fainter than that in Hughes et al. (1994), whereas the 2MASS JHKS magnitudes are brighter than those listed in that work by 0.4 mag. The source thus seems to be highly variable and our fit is likely to be affected by non-simultaneity of observations.
22: Selected as possible member by Nakajima et al. (2000) because of near-infrared excess.
24: Variability at the $\sim$0.2 mag level in JHKS reported by Hughes et al. (1994). Our $I_{\rm C}$ measurement is very similar to that of Hughes et al. (1994). Probably variable.
25: Possibly variable: 2MASS J magnitude brighter than in Hughes et al. (1994) by $\sim$0.2 mag, but H and KS almost identical. Our $I_{\rm C}$ measurement is $\sim$0.2 mag brighter than in Hughes et al. (1994).
26: K2 in Hughes et al. (1994). The 2MASS HKS magnitudes are fainter than in Hughes et al. (1994) by $\sim$0.2 mag, but J is very similar. Our measurement in $I_{\rm C}$ is 0.5 mag fainter than in Hughes et al. (1994). Probably variable, affecting our fit.
27: Moderately variable: the $R_{\rm C}$ and $I_{\rm C}$ in Comerón et al. (2003) are 0.17 mag fainter than in the new WFI measurements, and the 2MASS H and KS magnitudes are $\sim$0.1 mag brighter than the measurements in those bands given in Comerón et al. (2003).
28: Photometry in $R_{\rm C}$ contaminated by a much bluer companion at 1''7, clearly detected in $R_{\rm C}$, much fainter in $I_{\rm C}$ and undetected in $z_{\rm WFI}$.
29: Extended in the NE-SW direction in the $R_{\rm C}$ image. Hints of elongation in $I_{\rm C}$, point source in $z_{\rm WFI}$. It might possess an outflow.
30: Very uncertain WFI photometry:marginal detection in $R_{\rm C}$ and $z_{\rm WFI}$, and very faint in $I_{\rm C}$.
31: Slightly fainter companion at 2''.
32: Undetected in $R_{\rm C}$ and faint in $I_{\rm C}$; uncertain fit at the WFI wavelengths.
33: Close companion at 1''5 contaminating our photometry.
34: Clearly elongated in the NW-SE direction in $R_{\rm C}$, hints of elongation also in $I_{\rm C}$ and $z_{\rm WFI}$. It might be scattered light by a close-to-edge-on disk.
35: Slightly elongated in $R_{\rm C}$ and $I_{\rm C}$ in the NW-SE direction.
36: High residual fit (over 0.2 mag rms).

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