1999MNRAS.310..210S


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.17CEST02:42:02

1999MNRAS.310..210S - Mon. Not. R. Astron. Soc., 310, 210-222 (1999/November-3)

The stellar composition of the star formation region CMa R1 - I. Results from new photometric and spectroscopic classifications.

SHEVCHENKO V.S., EZHKOVA O.V., IBRAHIMOV M.A., VAN DEN ANCKER M.E. and TJIN A DJIE H.R.E.

Abstract (from CDS):

A new photometric and spectroscopic survey of the star formation region (SFR) CMa R1 is described. In a sample of 165 stars brighter than 13th mag, 88 stars were found to be probable members of the SFR. They are defined as early-type stars with E(B-V){ges}0.16mag, which corresponds to a distance of about 1kpc. 74 of the probable members are B stars. 19 stars are possibly associated with an IRAS point source. We derive a most probable distance of 1050±150pc to the association. It appears that about 80 candidate members are pre-main-sequence stars with ages lower than 6 million years, while the main sequence extends over 6.0-7.6mag, which is consistent with star formation starting about 8 million years ago and continuing until at least half a million years ago. Two bright B stars in the association (GU CMa and FZ CMa) seem to be much older and probably do not originate from the same star formation episode. The star formation efficiency appears to increase roughly monotonically with time up to half a million years ago. From our data, we conclude that only a minor fraction of the stars has been created through the scenario suggested by Herbst & Assousa, in which the members of CMa R1 form by compression of ambient material by a supernova shock wave. An extensive search for candidate members with Hα emission did not reveal new Herbig Ae/Be candidates, so that the number of stars in this class seems to be limited to four: Z CMa, LkHα 218, LkHα 220 and possibly HD 53367.

Abstract Copyright: 1999, Royal Astronomical Society

Journal keyword(s): circumstellar matter - stars: early-type - stars: evolution - stars: formation - stars: pre-main-sequence - open clusters and associations: individual: CMa R1

VizieR on-line data: <Available at CDS (J/MNRAS/310/210): table1 notes + MPG (Animations of association evolut ion)>

Nomenclature: Table 1: [SEI99] NNN (Nos 1-165).

Simbad objects: 169

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Number of rows : 169

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 [SEI99] 1 * 06 59 58.6611439849 -11 36 42.447873233   10.57 10.28     A5 1 0
2 HD 52271 ** 07 00 03.43979 -12 00 20.3356   8.38 8.36     B9IV 10 1
3 [SEI99] 3 * 07 00 05.0813469451 -11 32 05.790598084   11.30 11.21     A2 2 0
4 HD 52291 * 07 00 11.3873720133 -11 47 44.583498490   9.85 9.79     A0IV/V 4 0
5 HD 52314 * 07 00 17.8119243303 -11 43 32.150627663   9.60 9.45     A2III 4 0
6 [SEI99] 7 * 07 00 20.8327847993 -10 49 11.382637025   12.08 11.74     A8-F0 2 0
7 [SEI99] 8 * 07 00 23.0762889730 -10 53 27.155306059   11.96 11.74 11.81   A8 1 0
8 [SEI99] 6 * 07 00 24.1996115601 -12 04 25.126286062   11.77 11.45     A2-3 2 0
9 HD 52344 * 07 00 28.7761052109 -11 01 35.055644355   9.99 9.91     A2/5(IV) 4 0
10 [SEI99] 11 * 07 00 28.8007146935 -10 52 10.885820769   10.48 10.21     B9 1 0
11 HD 52386 * 07 00 31.8528611139 -11 27 30.674617467   10.41 10.15     A8V 4 0
12 [SEI99] 9 * 07 00 31.9744726932 -11 42 25.117572113   12.04 11.86 11.96   B6 1 0
13 [SEI99] 13 * 07 00 32.0119384223 -10 27 48.891491820   11.29 11.17     B9-A0 1 0
14 [SEI99] 15 * 07 00 35.0796574373 -11 11 31.328776862   10.95 10.89     A3 1 0
15 [SEI99] 14 * 07 00 35.9749104414 -11 44 13.710183032   11.20 11.11 11.24   A3 1 0
16 [SEI99] 19 * 07 00 38.1899991724 -10 51 25.167265324   11.53 11.19     B7-8 2 0
17 [SEI99] 16 * 07 00 38.2327036336 -12 12 38.455135384   11.57 12.07     A0 2 0
18 HD 52412 * 07 00 38.4739463953 -11 31 45.567290790   10.19 10.22     B5/7(III) 5 0
19 [SEI99] 17 * 07 00 38.4751170673 -12 10 07.016558648   11.72 11.10     A8 1 0
20 [SEI99] 20 * 07 00 38.7108415301 -10 52 32.215925229   11.68 11.20     B9 2 0
21 [SEI99] 21 * 07 00 39.0752351739 -10 34 42.267785682   12.11 11.55     B8-9 2 0
22 [SEI99] 23 * 07 00 44.8497680715 -10 57 22.153772429   11.33 11.21 11.49   B5-6 1 0
23 [SEI99] 22 * 07 00 45.2593124457 -11 16 34.393583228   10.48 10.17     F1-2 1 0
24 HD 52508 * 07 01 02.6250185947 -11 43 14.569296922   9.40 9.40     B9.5V 5 0
25 [SEI99] 25 * 07 01 07.7473698421 -11 24 04.242525355   11.04 10.89     A1-2 2 0
26 HD 52507 * 07 01 09.0014097192 -10 26 59.898694657   10.15 9.96     A3II/III 4 0
27 [SEI99] 26 * 07 01 12.6042575837 -11 28 33.760424389   10.55 10.13     F2 2 0
28 [SEI99] 28 * 07 01 15.1022326648 -11 03 47.102463454   10.18 10.01     B3 2 0
29 [SEI99] 29 * 07 01 18.6900437754 -11 41 32.351095325   10.41 10.38     A2-3 3 0
30 BD-10 1813 * 07 01 22.0770940226 -10 12 26.858976681   10.34 9.93     F5 2 0
31 TYC 5385-1636-1 * 07 01 23.0298912432 -10 47 41.156926602   11.03 10.78     B8 1 0
32 HD 52565 * 07 01 24.8555995209 -10 16 34.876518622   9.97 9.94     A1IV 6 0
33 [SEI99] 34 * 07 01 28.2200807318 -10 34 09.913263313   11.88 11.45     A3 2 0
34 HD 52641 * 07 01 29.6285645084 -12 19 44.063618869   9.08 8.91     A4IV 4 0
35 [SEI99] 35 * 07 01 35.4723522894 -11 41 16.717408013   10.60 10.12     F8 1 0
36 [SEI99] 36 * 07 01 38.1472586438 -12 09 11.297153020   11.96 11.61     F1 2 0
37 [SEI99] 37 * 07 01 42.6127603754 -11 53 59.500918250   11.06 11.17     A3 3 0
38 HD 52721 Ae* 07 01 49.50977 -11 18 03.3219 5.88 6.65 6.59 7.52   B2Vne 204 0
39 2MASS J07014965-1120396 * 07 01 49.6566709294 -11 20 39.519932148   12.90 11.75     M4Ib-II 4 0
40 HD 52723 * 07 01 52.1301283888 -12 02 04.094288214   10.26 10.22     A1/2IV/V 6 0
41 [SEI99] 41 * 07 01 53.5100675770 -10 08 30.729386753   10.97 11.01     A2-3 1 0
42 HD 52746 * 07 01 58.0150727180 -12 10 51.102729792   9.76 9.66     B7II 4 0
43 [SEI99] 42 * 07 02 00.4272617503 -10 33 03.906027909   11.48 11.41     A2-3 2 0
44 [SEI99] 43 * 07 02 01.3548431729 -10 35 36.927816312   11.78 11.54     A8-F0: 2 0
45 [SEI99] 45 * 07 02 04.9956112012 -10 14 35.567149588   11.13 10.89     B9 2 0
46 HD 52773 * 07 02 05.1332422147 -11 04 49.891460303   9.90 9.83     A0V 5 0
47 [SEI99] 47 * 07 02 08.6299867714 -10 47 17.308495040   10.78 10.46     A8 1 0
48 HD 52774 * 07 02 08.7977594994 -11 10 05.743049596   8.83 8.82     A0/1IV 7 0
49 [SEI99] 50 * 07 02 11.1969620875 -10 15 47.526619389   10.53 10.48     B3 1 0
50 [SEI99] 49 * 07 02 11.8333341955 -10 36 14.576390964   10.43 10.32     B9 2 0
51 [SEI99] 51 * 07 02 13.2414697568 -10 35 23.126750521   10.79 10.66     A0-1 3 0
52 HD 52841 * 07 02 15.7954163943 -11 34 08.090445518   10.18 9.93     A8/9III 6 0
53 [SEI99] 52 * 07 02 23.8575230383 -11 49 41.074789987   11.46 10.98     B8-9 3 0
54 [SEI99] 55 ** 07 02 24.8 -10 17 37   11.35 11.02     B8-9 1 0
55 [SEI99] 54 * 07 02 26.5595674453 -11 01 58.231717187   11.62 11.48     F1 3 0
56 [SEI99] 53 * 07 02 26.8600224421 -11 12 25.264843820   11.07 10.96     A3 3 0
57 BD-09 1808 ** 07 02 30.51 -10 02 37.1   10.30 10.14     A0 1 0
58 [SEI99] 58 * 07 02 31.4036998296 -10 42 43.345853463   10.37 10.25     B9 1 0
59 HD 52891 * 07 02 34.3442556636 -10 04 23.867963150   9.54 9.05     F3V 6 0
60 [SEI99] 59 * 07 02 35.4144186088 -11 11 50.972495512   11.99 11.91     B8 1 0
61 [SEI99] 61 * 07 02 37.5574053904 -11 10 11.558402459   12.06 11.96     F0 3 0
62 [SEI99] 57 * 07 02 38.0897738804 -11 54 05.543128863   11.41 10.95     B7-8 1 0
63 BD-12 1748 * 07 02 38.6415005385 -12 14 01.581237720 10.27 10.48 10.23     B8III 12 1
64 [SEI99] 64 * 07 02 42.3889394162 -10 39 49.653937048   10.85 10.69     A1 2 0
65 EM* LkHA 218 Ae* 07 02 42.5311084174 -11 26 11.826251745   13 11.63     A0e 61 0
66 V* FZ CMa EB* 07 02 42.6144514495 -11 27 11.571990512 7.71 8.28 8.14     B2IVn 102 1
67 HD 52982 * 07 02 51.0180759204 -11 45 56.140238155   10.10 9.85     A2/3IV 6 0
68 HD 52967 * 07 02 52.9383743895 -10 45 08.235789349   9.90 9.95     B9V 7 0
69 [SEI99] 63 * 07 02 54.4636829573 -12 23 24.880772146   11.82 11.86     A3 2 0
70 HD 52966 * 07 02 54.6472509351 -10 21 21.623648119   9.32 8.86     F3IV/V 5 0
71 HD 53011 * 07 02 57.6569411389 -11 58 10.560350786   10.31 10.19     A1III/IV 6 0
72 UCAC2 27801165 * 07 02 59.0586958830 -11 27 25.797508635 11.21 11.58 11.17 11.16   B2V 10 0
73 HD 53010 ** 07 03 02.2511659474 -11 07 01.588962291   8.93 8.92     B3IV 18 0
74 [SEI99] 71 * 07 03 06.9667867050 -11 38 30.252882346   13.69 13.01 12.89   ~ 1 0
75 HD 53035 * 07 03 07.7711436357 -11 11 57.014278693 7.24 7.81 7.88     B3/5III 30 0
76 HRW 7 * 07 03 10.7757861165 -11 38 28.654814021 10.38 10.76 10.64     B3III-IV 6 0
77 [SEI99] 74 * 07 03 11.4556484990 -11 25 38.929944014   10.38 10.26     A3 2 0
78 [SEI99] 75 * 07 03 11.6039582804 -11 18 57.360229789   12.37 12.09 12.13   F0 2 0
79 HD 53060 * 07 03 14.2033939179 -11 08 14.671149058   8.03 7.99     A0IV/V 14 0
80 [SEI99] 77 * 07 03 19.5189673513 -11 23 28.288306354   11.73 11.58     B3 3 0
81 [SEI99] 78 * 07 03 20.5640249513 -10 55 53.096159896   11.16 10.87     B2 3 0
82 BD-10 1839 * 07 03 24.5580813111 -10 42 16.330121225 9.81 10.12 9.76     B2Vn 24 1
83 LS 137 * 07 03 34.6013252881 -11 44 55.356498103   11.19 10.52 10.39   B0 8 0
84 [SEI99] 83 * 07 03 36.3158745933 -11 06 06.561989141   12.55 12.21     F0-1 1 0
85 HD 53159 ** 07 03 37.3494890586 -10 31 20.339174954   9.57 9.27     F0V 4 0
86 [SEI99] 86 * 07 03 39.2330943471 -10 26 12.778375731   11.29 10.89     B9-A0 3 0
87 [SEI99] 82 * 07 03 39.6148736468 -11 31 52.668069101   11.63 11.55     B8 3 0
88 [SEI99] 81 * 07 03 39.7485921791 -11 49 36.939890765   10.56 10.45     B9 2 0
89 [SEI99] 84 * 07 03 40.6373918843 -11 23 31.408678008   11.69 11.51     A 4 0
90 V* Z CMa Ae* 07 03 43.1588002461 -11 33 06.230351311 10.51 9.99 8.80     B5/8eq+F5/7 537 3
91 HRW 10 * 07 03 46.5164341641 -11 03 46.083910753   13.29 12.84 12.78   ~ 3 0
92 [SEI99] 88 * 07 03 49.8143412402 -11 28 22.448322773   11.76 11.18     ~ 2 0
93 BD-11 1761 * 07 03 52.4972657195 -11 34 51.856413407 8.83 9.32 9.25     B2V 20 0
94 [SEI99] 90 Y*O 07 03 53.4969415245 -11 23 50.698891714 10.97 10.75 10.53 10.78   A0 4 0
95 BD-11 1762 * 07 03 54.4251151417 -11 28 29.384100791 9.6 10.14 10.05     B2 22 0
96 [SEI99] 93 * 07 03 54.8437470860 -11 33 41.297819101   10.22 10.13 10.23   ~ 1 0
97 BD-11 1763 Y*O 07 03 54.8582142921 -11 34 34.069570206   9.52 9.53 9.60 9.12 B1.5V 25 0
98 [SEI99] 96 * 07 03 56.3467413896 -10 46 16.210330765   11.65 12.10     A8 2 0
99 HRW 14 * 07 03 56.8413343105 -11 34 41.747160613 12.57 12.66 12.07 12.03   B7III 8 0
100 [SEI99] 95 Y*O 07 03 58.8046375662 -11 35 31.168166109   11.17 11.51 11.42 10.97 B2-3 5 0
101 [SEI99] 98 * 07 03 59.1533556243 -11 03 17.027601845   11.35 11.31     F2 3 0
102 BD-10 1845 * 07 03 59.2022413241 -11 11 58.972124785   10.42 10.29     B4V 5 0
103 [SEI99] 105 * 07 03 59.8591355843 -10 30 23.723820620   10.63 10.51     B7 3 0
104 [SEI99] 101 * 07 04 00.7342755684 -11 00 04.127971675   11.24 11.06     B6-8 3 0
105 [SEI99] 99 Y*O 07 04 02.3424096176 -11 25 39.377739433 10.23 10.69 10.74 10.8 10.38 B3-5 7 0
106 [SEI99] 100 * 07 04 02.8390515826 -11 32 15.556310125   11.90 11.69 11.81   B8-9 1 0
107 [SEI99] 104 * 07 04 03.4212561987 -11 10 04.335931155   12.22 11.47     F5-8 3 0
108 [SEI99] 102 Y*O 07 04 03.9363502127 -11 26 09.790437448 9.45 10.08 10.16 9.78 9.74 ~ 6 0
109 [SEI99] 106 * 07 04 04.2296123010 -10 54 42.860156832   11.72 11.40     F5 3 0
110 BD-11 1765 Y*O 07 04 05.4224843654 -11 28 56.186870712   10.32 10.21 11.39 10.06 B2 5 0
111 EM* LkHA 220 Ae* 07 04 06.7001589080 -11 26 08.503450864   11.62 11.60     B8e 51 0
112 HRW 16 * 07 04 07.5035323472 -11 18 57.011753640   11.62 11.08 11.20   B5Vn 6 0
113 [SEI99] 110 * 07 04 09.0690401494 -11 05 16.568957349   10.59 10.40     A5 2 0
114 HD 53302 * 07 04 09.4396738097 -10 16 57.465787561   8.40 8.18     A3III 6 0
115 [SEI99] 109 * 07 04 09.7978294733 -11 32 53.847938090   11.80 12.28     A8 2 0
116 HRW 17 * 07 04 13.0 -11 19 01 11.78 12.11 11.83     B8II 8 0
117 [SEI99] 108 * 07 04 13.0610071328 -12 10 20.768734997   11.13 11.15     B6-8 3 0
118 [SEI99] 115 * 07 04 15.0033396345 -11 06 56.830275590   11.93 11.68     A5 3 0
119 BD-10 1847 * 07 04 15.7678969022 -10 34 31.274524099   10.43 10.47     B9 4 0
120 HD 53339 Y*O 07 04 15.8847 -11 24 05.615   9.55 9.41 10.56 9.30 B3V 20 0
121 HRW 18 Y*? 07 04 17.6290821823 -11 18 09.132917838   12.51 12.00 11.95   A1IV-V 4 0
122 HRW 19 * 07 04 19.1308937605 -11 17 13.099066986   12.27 12.13     A0IV-V 4 0
123 [SEI99] 119 * 07 04 22.1082428753 -11 39 06.834491324   10.70 10.56     B5 3 0
124 IC 2177 RNe 07 04 25 -10 27.3           ~ 146 2
125 [SEI99] 120 * 07 04 25.0044887839 -11 29 00.746412590   12.12 11.85 11.91   A8-F0: 1 0
126 HD 53367 Ae* 07 04 25.5189757244 -10 27 15.613478141 6.81 7.40 6.96 7.92   B0IV/Ve 307 0
127 [SEI99] 121 Y*O 07 04 26.4096097990 -11 32 21.227217980   12.51 12.26 11.92 11.95 B8 2 0
128 HD 53396 * 07 04 28.9152581113 -11 48 57.902909483   9.69 9.67     B8/9II 7 0
129 [SEI99] 123 * 07 04 30.9682469721 -11 33 54.264109315   11.93 11.71 11.79   B5-7 1 0
130 [SEI99] 124 * 07 04 35.3063 -11 44 58.204   10.65 10.58     B7 3 0
131 HRW 21 Em* 07 04 35.9004014892 -11 04 48.256100178   15.83 14.58     F0e 7 0
132 HD 53456 ** 07 04 38.30264 -11 31 26.6198 6.41 7.31 7.40     B1Ib/II 49 0
133 HD 53457 * 07 04 38.4735725640 -11 59 07.627601805   9.30 9.31     B9III 9 0
134 [SEI99] 127 * 07 04 44.9242507426 -12 24 34.198371199   11.06 10.67     B6 1 0
135 ALS 17708 * 07 04 45.3 -10 34 12 10.74 10.91 10.77     B8III-IV 5 0
136 2MASS J07044736-1056174 * 07 04 47.3576438799 -10 56 17.552334305   13.89 13.31     A0V: 8 0
137 HRW 25 * 07 04 47.5 -11 06 37   13.48 13.10     A1IV-V: 3 0
138 EM* LkHA 223 Em* 07 04 48 -11 34.4           ~ 2 0
139 HD 53515 * 07 04 51.4722848349 -11 54 51.817860338   9.19 9.19     B9.5III/IV 4 0
140 [SEI99] 132 * 07 04 53.6548409853 -11 15 19.117504333   11.85 12.32     B6-7 2 0
141 HRW 26 * 07 04 53.9501692029 -10 38 49.462265062   13.04 12.39 12.29   A1IV 4 0
142 [SEI99] 133 * 07 04 59.1446513547 -12 02 30.779713060   11.93 11.55 11.60   F0 1 0
143 [SEI99] 134 * 07 05 00.2480244004 -12 12 42.952029771   11.73 12.13     A5 1 0
144 [SEI99] 137 * 07 05 01.8232027034 -10 22 02.179982897   11.41 11.07     B6-8 3 0
145 [SEI99] 139 * 07 05 04.2526420613 -10 22 31.326331724   12.02 11.86 11.91   B9-A0 1 0
146 HD 53569 * 07 05 07.1597338231 -10 49 59.789073734   10.43 10.29     A2/4V 5 0
147 [SEI99] 141 * 07 05 07.4388639777 -10 51 18.345157161   9.94 9.88     B9 3 0
148 [SEI99] 136 * 07 05 09.9420866665 -12 06 00.168760241   11.57 11.02     F1 2 0
149 [SEI99] 138 * 07 05 11.4827109520 -12 06 01.973359837   12.81 12.56 12.57   A8 1 0
150 HD 53623 * 07 05 16.7477934484 -12 19 34.492738033 7.02 8.88 8.87 8.84   B1II/III 68 1
151 HD 53622 * 07 05 18.5120353309 -11 17 22.180297367   9.27 9.35     B5/7III 10 0
152 [SEI99] 143 * 07 05 19.2005238099 -11 36 48.671761862   10.58 10.54     B6-8 3 0
153 [SEI99] 145 * 07 05 26.5244545398 -11 11 21.742893513   11.61 11.54     B7-8 1 0
154 [SEI99] 146 * 07 05 33.5315224842 -10 18 16.171369159   10.93 10.92     B8-9 2 0
155 [SEI99] 147 * 07 05 34.1626442780 -10 34 53.750654608   11.95 11.91     F0-1 2 0
156 [SEI99] 148 * 07 05 34.4333616214 -11 24 04.445870055   10.97 10.51     A5-8 1 0
157 HD 53691 * 07 05 37.6200612126 -11 09 26.155368903 8.71 9.32 9.38     B3/5III 25 0
158 HD 53723 * 07 05 39.6842441411 -11 34 05.588247541   9.89 9.88     B9.5IV/V 5 0
159 [SEI99] 152 * 07 05 45.1438131359 -10 19 23.468226473   10.79 10.68     A4 2 0
160 [SEI99] 151 * 07 05 45.9478984637 -11 16 05.545656821   11.85 11.60 11.68   A8-F0 1 0
161 V* V569 Mon bC* 07 05 49.63971 -10 39 36.2907 5.55 6.44 6.49 7.55   B1II/III 104 0
162 BD-10 1864 * 07 05 51.4318131241 -10 34 26.931105299   10.18 10.24     B7-8 3 0
163 HD 53776 * 07 05 52.4302659269 -11 05 41.482265252   9.20 9.14     A0V 6 0
164 BD-10 1866 * 07 05 53.8674976570 -10 47 42.875680286   10.40 10.53     B4-6 4 0
165 [SEI99] 155 * 07 05 54.6528602424 -11 20 15.109815175   10.66 10.38     F1-2 2 0
166 [SEI99] 157 * 07 05 59.1668503594 -11 14 26.855049951   11.24 10.82     F1-2 2 0
167 NAME CMa R1 As* 07 08 21.3 -11 04 50           ~ 77 1
168 HD 54662 SB* 07 09 20.2488124291 -10 20 47.627880802 5.35 6.24 6.21 7.23   O6.5Vz(n)+O7.5Vz 325 2
169 NAME III CEP ASSOC As* 23 04.2 +63 24           ~ 300 0

    Equat.    Gal    SGal    Ecl

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2021.06.17-02:42:02

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