2004A&A...421..623K


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST12:52:29

2004A&A...421..623K - Astronomy and Astrophysics, volume 421, 623-642 (2004/7-2)

The young stellar population in the Serpens Cloud Core: An ISOCAM survey.

KAAS A.A., OLOFSSON G., BONTEMPS S., ANDRE P., NORDH L., HULDTGREN M., PRUSTI T., PERSI P., DELGADO A.J., MOTTE F., ABERGEL A., BOULANGER F., BURGDORF M., CASALI M.M., CESARSKY C.J., DAVIES J., FALGARONE E., MONTMERLE T., PERAULT M., PUGET J.L. and SIBILLE F.

Abstract (from CDS):

We present results from an ISOCAM survey in the two broad band filters LW2 (5-8.5µm) and LW3 (12-18µm) of a 0.13 square degree coverage of the Serpens Main Cloud Core. A total of 392 sources were detected in the 6.7µm band and 139 in the 14.3µm band to a limiting sensitivity of ∼2mJy. We identified 53 Young Stellar Objects (YSOs) with mid-IR excess from the single colour index [14.3/6.7], and 8 additional YSOs from the H-K/K-m6.7 diagram. Only 32 of these 61 sources were previously known to be YSO candidates. Only about 50% of the mid-IR excess sources show excesses in the near-IR J-H/H-K diagram. In the 48 square arcmin field covering the central Cloud Core the ClassI/ClassII number ratio is 19/18, i.e. about 10 times larger than in other young embedded clusters such as ρ Ophiuchi or Chamaeleon. The mid-IR fluxes of the ClassI and flat-spectrum sources are found to be on the average larger than those of ClassII sources. Stellar luminosities are estimated for the ClassII sample, and its luminosity function is compatible with a coeval population of about 2Myr which follows a three segment power-law IMF. For this age about 20% of the ClassIIs are found to be young brown dwarf candidates. The YSOs are in general strongly clustered, the ClassI sources more than the ClassII sources, and there is an indication of sub-clustering. The sub-clustering of the protostar candidates has a spatial scale of 0.12pc. These sub-clusters are found along the NW-SE oriented ridge and in very good agreement with the location of dense cores traced by millimeter data. The smallest clustering scale for the ClassII sources is about 0.25pc, similar to what was found for ρ Ophiuchi. Our data show evidence that star formation in Serpens has proceeded in several phases, and that a ``microburst'' of star formation has taken place very recently, probably within the last 105yrs.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: pre-main-sequence - stars: luminosity function, mass function - stars: low-mass, brown dwarfs - ISM: individual objects: Serpens Cloud Core

VizieR on-line data: <Available at CDS (J/A+A/421/623): table2.dat table3.dat>

Nomenclature: Tables 2,3: [KOB2004] NNNa N=77+71.

CDS comments: Fig. 11 : FIRS1 = [HWJ84] FIRS 1 (RA of [HWJ84] does not coincide with location in Fig.11), SMM N = [CED93] N.

Simbad objects: 167

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Number of rows : 167

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 OMC 3 MoC 05 35 20.0 -05 01 00           ~ 219 1
2 NAME Cha I MoC 11 06 48 -77 18.0           ~ 968 1
3 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3027 0
4 [KOB2004] 2 IR 18 28 41.2 +01 15 15           ~ 1 0
5 [KOB2004] 4 IR 18 28 41.9 +01 14 06           ~ 1 0
6 2MASS J18284240+0114313 IR 18 28 42.4001404834 +01 14 31.506345393           ~ 2 0
7 [KOB2004] 9 IR 18 28 43.6 +01 16 10           ~ 2 0
8 2MASS J18284520+0110253 IR 18 28 45.2010263102 +01 10 25.367797553           ~ 2 0
9 2MASS J18284527+0116468 * 18 28 45.2813369224 +01 16 46.890261165           ~ 2 0
10 2MASS J18284704+0110400 IR 18 28 47.0484749873 +01 10 40.189907520           ~ 2 0
11 2MASS J18284847+0113189 IR 18 28 48.4724640724 +01 13 18.960074719           ~ 2 0
12 2MASS J18284975+0119123 IR 18 28 49.7565950144 +01 19 12.404555520           ~ 2 0
13 [KOB2004] 29 Y*O 18 28 52.5 +01 12 47           ~ 1 0
14 [KOB2004] 31 IR 18 28 52.6 +01 10 10           ~ 1 0
15 TYC 433-402-1 * 18 28 58.4444203768 +01 11 01.198750333   11.94 11.30     F5V 5 0
16 2MASS J18285996+0110014 IR 18 28 59.9697286906 +01 10 01.367177667           ~ 2 0
17 2MASS J18290055+0118200 * 18 29 00.5538174548 +01 18 20.093523714           ~ 2 0
18 2MASS J18290367+0118346 IR 18 29 03.6762238836 +01 18 34.664542448           ~ 3 0
19 2MASS J18290382+0110425 IR 18 29 03.8187956360 +01 10 42.499941774           ~ 2 0
20 2MASS J18290436+0116207 IR 18 29 04.3687979519 +01 16 20.760216771           ~ 2 0
21 2MASS J18290489+0120081 IR 18 29 04.8949220325 +01 20 08.132306731           ~ 2 0
22 2MASS J18290508+0122114 * 18 29 05.0885639461 +01 22 11.493539088           ~ 2 0
23 2MASS J18290794+0112389 IR 18 29 07.9452650761 +01 12 38.953314241           ~ 2 0
24 2MASS J18290900+0109232 * 18 29 09.0044585445 +01 09 23.155247136           ~ 2 0
25 NAME Filament in Serpens Cloud PoC 18 29 10 +01 05.0           ~ 1 1
26 2MASS J18291070+0118318 IR 18 29 10.7033103501 +01 18 31.827676896           ~ 2 0
27 [KOB2004] 84 * 18 29 10.8984779934 +01 18 08.995782501           K3e 3 0
28 2MASS J18291269+0111234 IR 18 29 12.6967915140 +01 11 23.320065810           ~ 2 0
29 2MASS J18291348+0112000 IR 18 29 13.4838655622 +01 11 59.997787757           ~ 2 0
30 2MASS J18291407+0121317 IR 18 29 14.0730125766 +01 21 31.727811431           ~ 2 0
31 2MASS J18291507+0122013 * 18 29 15.0798741593 +01 22 01.320359762           ~ 2 0
32 2MASS J18291600+0109382 IR 18 29 16.0146473016 +01 09 38.092869657           ~ 2 0
33 2MASS J18291704+0118400 IR 18 29 17.0473714588 +01 18 40.025916544           ~ 2 0
34 2MASS J18292004+0121014 Y*O 18 29 20.0478911341 +01 21 01.433754747           ~ 5 0
35 2MASS J18292572+0103469 * 18 29 25.7231718677 +01 03 46.942263798           ~ 2 0
36 2MASS J18292676+0111550 IR 18 29 26.7655104133 +01 11 55.134922759           ~ 2 0
37 BD+01 3686 * 18 29 27.5980007743 +01 12 58.424165663   11.57 11.05     F8 6 0
38 2MASS J18292860+0110272 IR 18 29 28.6052937507 +01 10 27.265245067           ~ 2 0
39 2MASS J18292959+0114074 IR 18 29 29.5969315090 +01 14 07.467772945           ~ 2 0
40 2MASS J18292969+0113130 * 18 29 29.6986250306 +01 13 13.112356055           ~ 2 0
41 2MASS J18293084+0101071 Y*O 18 29 30.849 +01 01 07.13           ~ 6 0
42 [KOB2004] 153 * 18 29 31.0582051116 +01 15 21.564376420           G9-K2 3 0
43 BD+01 3687 Y*O 18 29 31.7257977970 +01 08 20.589323639   11.81 11.26 11.284   F3-F9V-IVe 4 0
44 ESO-HA 279b Y*O 18 29 31.934 +01 18 34.36           ~ 4 1
45 IRAS 18269+0116 cor 18 29 31.968 +01 18 42.17           ~ 10 1
46 ESO-HA 279a cor 18 29 31.976 +01 18 42.59           K6.5 29 1
47 [KOB2004] 166 * 18 29 32.6211064326 +01 09 50.147165902           K2-K3e 3 0
48 2MASS J18293338+0108242 Y*O 18 29 33.3827559573 +01 08 24.194685909           A7.0 12 0
49 [EC92] 170 * 18 29 36.8 +01 13 17           ~ 2 1
50 2MASS J18293748+0109106 IR 18 29 37.4942859650 +01 09 10.672038853           ~ 2 0
51 [KOB2004] 189 Y*O 18 29 37.5967247815 +01 11 17.251104165           M2.0 6 0
52 [KOB2004] 190 Y*O 18 29 37.6897224229 +01 11 29.790614582           M2.0 9 0
53 2MASS J18293805+0100338 IR 18 29 38.0561660775 +01 00 33.944334648           ~ 2 0
54 2MASS J18293987+0117559 Y*O 18 29 39.8730587848 +01 17 55.890063693           M1.5 12 0
55 2MASS J18294095+0112386 IR 18 29 40.96 +01 12 38.6           ~ 3 0
56 [KOB2004] 209 * 18 29 41.0370726034 +01 20 58.413523815           M3.5-M4.5e 3 0
57 2MASS J18294147+0107378 Y*O 18 29 41.4745026391 +01 07 37.869168699           K2.5 15 0
58 2MASS J18294151+0110040 Y*O 18 29 41.5309617121 +01 10 04.239669315           M4.0 8 0
59 2MASS J18294217+0120209 Y*O 18 29 42.176 +01 20 20.99           ~ 7 0
60 2MASS J18294393+0107208 Y*O 18 29 43.9378583921 +01 07 20.714617731           K7.0 13 0
61 2MASS J18294430+0104534 Y*O 18 29 44.3144872544 +01 04 53.425155429           M9.0 13 0
62 2MASS J18294453+0113113 Y*O 18 29 44.538 +01 13 11.35           M4.5 13 0
63 2MASS J18294474+0115406 Y*O 18 29 44.75 +01 15 40.7           ~ 3 0
64 2MASS J18294508+0118469 * 18 29 45.08 +01 18 47.0           G0/M4III 12 0
65 2MASS J18294598+0116240 Y*O 18 29 45.99 +01 16 24.1           ~ 3 0
66 2MASS J18294624+0112134 Y*O 18 29 46.2443104103 +01 12 13.409552729           ~ 3 0
67 2MASS J18294681+0116085 Y*O 18 29 46.82 +01 16 08.6           ~ 3 0
68 2MASS J18294702+0116267 Y*O 18 29 47.023 +01 16 26.77           ~ 12 0
69 StRS 208 * 18 29 47.6279549821 +01 05 07.328232390           ~ 3 0
70 SH 2-68 N Y*O 18 29 48.09 +01 16 45.0           ~ 102 1
71 2MASS J18294878+0113422 Y*O 18 29 48.787 +01 13 42.22           ~ 11 0
72 2MASS J18294899+0111441 IR 18 29 49.00 +01 11 44.2           ~ 3 0
73 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 912 2
74 2MASS J18294907+0058517 IR 18 29 49.0713033712 +00 58 51.920336411           ~ 2 0
75 IRAS 18272+0114 Or* 18 29 49.13016 +01 16 20.6472           ~ 62 1
76 V* V370 Ser Or* 18 29 49.24584 +01 16 31.5480           ~ 27 0
77 2MASS J18294960+0117058 Y*O 18 29 49.602 +01 17 05.83           ~ 26 0
78 NAME SH 2-68 FIR 1 cor 18 29 49.63 +01 15 21.9           ~ 236 2
79 SSTc2d J182949.6+011456 Y*O 18 29 49.70 +01 14 56.7           ~ 14 0
80 [KOB2004] 258b Y*O 18 29 49.94 +01 15 19.0           ~ 4 0
81 2MASS J18295017+0056080 Y*O 18 29 50.1909275629 +00 56 07.731721338           ~ 10 0
82 2MASS J18295022+0109151 IR 18 29 50.2260387983 +01 09 15.137288305           ~ 3 0
83 SSTc2d J182950.5+011417 Y*O 18 29 50.54 +01 14 16.9           ~ 3 0
84 SSTc2d J182950.6+010133 Y*O 18 29 50.58 +01 01 32.9           ~ 2 0
85 2MASS J18295118+0113196 Y*O 18 29 51.186 +01 13 19.62           ~ 15 0
86 V* V371 Ser Or* 18 29 51.21240 +01 16 39.4860           ~ 92 1
87 2MASS J18295171+0056171 IR 18 29 51.7192665112 +00 56 17.248838469           ~ 2 0
88 2MASS J18295200+0110322 * 18 29 52.0102537298 +01 10 32.235969969           ~ 4 0
89 SSTc2d J182952.1+011322 Y*O 18 29 52.13 +01 13 21.9           ~ 5 0
90 NAME Serpens SMM 10 IR Y*O 18 29 52.20 +01 15 47.6           ~ 41 1
91 2MASS J18295248+0112467 Y*O 18 29 52.49 +01 12 46.7           ~ 5 0
92 [ACA2003] Ser B 1 Y*O 18 29 52.85 +01 14 56.1           ~ 17 1
93 2MASS J18295303+0104350 IR 18 29 53.0322485288 +01 04 34.950490182           ~ 2 0
94 2MASS J18295318+0115458 Y*O 18 29 53.183 +01 15 45.82           ~ 6 0
95 2MASS J18295354+0113051 Y*O 18 29 53.5526065764 +01 13 05.170955827           ~ 8 0
96 2MASS J18295360+0117017 Y*O 18 29 53.6097296564 +01 17 01.723303599   19.7   16.6   M2.0 19 0
97 2MASS J18295384+0113305 Y*O 18 29 53.845 +01 13 30.58           ~ 13 0
98 2MASS J18295409+0107108 Y*O 18 29 54.0964209403 +01 07 10.778321157           ~ 9 0
99 2MASS J18295428+0117468 IR 18 29 54.28 +01 17 46.8           ~ 2 0
100 2MASS J18295433+0115017 Y*O 18 29 54.34 +01 15 01.8           ~ 10 0
101 2MASS J18295452+0114469 Y*O 18 29 54.5186985049 +01 14 46.980796667           M8.0 10 0
102 2MASS J18295520+0113222 Y*O 18 29 55.200 +01 13 22.21           ~ 16 0
103 2MASS J18295571+0114315 Y*O 18 29 55.711 +01 14 31.50           ~ 38 0
104 2MASS J18295604+0104146 IR 18 29 56.0431217865 +01 04 14.446761976           ~ 2 0
105 2MASS J18295606+0100228 Y*O 18 29 56.0629266451 +01 00 22.982576265     12.417     B3-B5IIIe 7 0
106 2MASS J18295655+0112596 Y*O 18 29 56.553 +01 12 59.65           ~ 21 0
107 2MASS J18295667+0112393 Y*O 18 29 56.674 +01 12 39.32           ~ 18 0
108 SSTc2d J182956.7+011321 V* 18 29 56.71 +01 13 20.6   16.62       ~ 6 1
109 NAME Serpens SVS 2 Cluster Cl* 18 29 56.8 +01 14 46           ~ 10 0
110 HBC 672 Em* 18 29 56.8828626544 +01 14 46.339137067   17.6       K8.0 100 0
111 2MASS J18295696+0112478 Y*O 18 29 56.967 +01 12 47.83           M3.0 24 0
112 NAME Serpens SMM 4 cor 18 29 57.1 +01 13 15           ~ 123 0
113 2MASS J18295751+0113492 Y*O 18 29 57.510 +01 13 49.25           ~ 9 0
114 HD 170545B Y*O 18 29 57.5759105889 +01 10 47.047427369   9.82 9.58     A1-A8V-IIIe 8 0
115 2MASS J18295760+0113004 Y*O 18 29 57.602 +01 13 00.42           ~ 34 3
116 2MASS J18295766+0113045 Y*O 18 29 57.661 +01 13 04.57           ~ 20 1
117 IRAS 18274+0112 Y*O 18 29 57.73680 +01 14 05.6940           M4: 135 2
118 2MASS J18295781+0115318 Y*O 18 29 57.816 +01 15 31.86           K2.0 21 0
119 2MASS J18295781+0112280 Y*O 18 29 57.819 +01 12 28.05           ~ 19 0
120 NAME Serpens SVS 4 IR Cluster Cl* 18 29 57.84 +01 12 48.1           ~ 38 1
121 2MASS J18295784+0112379 Y*O 18 29 57.849 +01 12 37.90           ~ 22 0
122 2MASS J18295785+0112514 Y*O 18 29 57.858 +01 12 51.40           ~ 58 3
123 [EC92] 95 Y*O 18 29 57.893 +01 12 46.25           K1.0 71 3
124 2MASS J18295820+0115216 Y*O 18 29 58.2037104611 +01 15 21.603460135           K7.0 38 0
125 2MASS J18295830+0120270 Y*O 18 29 58.3024465716 +01 20 26.901516312           ~ 4 0
126 2MASS J18295844+0112502 Y*O 18 29 58.446 +01 12 50.21           ~ 11 0
127 2MASS J18295876+0114257 Y*O 18 29 58.765 +01 14 25.78           ~ 24 1
128 GCNM 115 Y*O 18 29 59.02 +01 12 24.9           ~ 13 0
129 CK 8 TT* 18 29 59.2453367145 +01 14 07.606895690   19.7   16.9   K7.5 28 0
130 SSTc2d J182959.5+011159 cor 18 29 59.573 +01 11 58.39           ~ 23 0
131 NAME SERPENS SMM 3 smm 18 29 59.7 +01 14 00           ~ 84 1
132 2MASS J18295980+0121560 IR 18 29 59.7983174438 +01 21 55.929347996           ~ 3 0
133 SSTc2d J182959.9+011311 Y*O 18 29 59.92 +01 13 11.6           ~ 16 1
134 SSTc2d J183000.3+010944 Y*O 18 30 00.30 +01 09 44.7           ~ 11 0
135 [CED93] 2 Y*O 18 30 00.4 +01 12 50           ~ 50 0
136 [KOB2004] 339 * 18 30 00.5629101690 +01 19 40.033177417           K3-K9e 5 0
137 CK 2 Y*O 18 30 00.618 +01 15 20.12           K5-M0III 52 0
138 2MASS J18300065+0113402 Y*O 18 30 00.6479615718 +01 13 40.113500422           M0.5 25 0
139 2MASS J18300111+0113242 Y*O 18 30 01.110 +01 13 24.24           ~ 13 0
140 2MASS J18300162+0059299 IR 18 30 01.6285396554 +00 59 29.875089216           ~ 2 0
141 2MASS J18300209+0113587 Y*O 18 30 02.095 +01 13 58.79           ~ 20 0
142 2MASS J18300274+0112280 Y*O 18 30 02.747 +01 12 28.06           ~ 27 2
143 2MASS J18300341+0116191 Y*O 18 30 03.4139495304 +01 16 19.088787966   18.9   15.0   M0.0 41 0
144 2MASS J18300371+0104490 IR 18 30 03.7082773208 +01 04 48.964825540           ~ 2 0
145 2MASS J18300375+0112401 Y*O 18 30 03.75 +01 12 40.1           ~ 3 0
146 2MASS J18300502+0112360 Y*O 18 30 05.022 +01 12 36.07           M9.0 12 0
147 2MASS J18300610+0106170 Y*O 18 30 06.1029526156 +01 06 16.935486714   19.0   16.5   M1.0 12 0
148 2MASS J18300642+0101056 Y*O 18 30 06.4186777900 +01 01 05.614047979           K5-K6e 7 0
149 2MASS J18300770+0112043 Y*O 18 30 07.708 +01 12 04.32           M2.5 15 0
150 2MASS J18300846+0055256 IR 18 30 08.4607472838 +00 55 25.677372840           ~ 2 0
151 2MASS J18300851+0101373 Y*O 18 30 08.5088546155 +01 01 37.322971346           K7-M0e 7 0
152 2MASS J18300865+0058461 Y*O 18 30 08.65 +00 58 46.2           K5: 8 0
153 2MASS J18300884+0055149 IR 18 30 08.84 +00 55 14.9           ~ 2 0
154 [HL85] GGD 29 7 * 18 30 08.9627339529 +01 14 44.145648682           ~ 5 0
155 2MASS J18300922+0117526 Y*O 18 30 09.2247042166 +01 17 52.466475327           M4.5 9 0
156 2MASS J18300944+0102470 Y*O 18 30 09.4479161450 +01 02 47.026003959           M3.5 8 0
157 BD+01 3693 * 18 30 10.3705831359 +01 19 35.391230940   11.20 10.55     F0III 5 0
158 2MASS J18301111+0112379 Y*O 18 30 11.1152539445 +01 12 38.034644989           M4.0 10 0
159 2MASS J18301208+0116422 Y*O 18 30 12.0804416188 +01 16 42.162576437           ~ 5 0
160 2MASS J18301397+0108512 Y*O 18 30 13.9768637262 +01 08 51.331890087           M5.0 11 0
161 2MASS J18301476+0106164 IR 18 30 14.7727400291 +01 06 16.436290915           ~ 2 0
162 2MASS J18301492+0105187 * 18 30 14.9264102896 +01 05 18.831089176           ~ 2 0
163 NAME CrA Dark Cloud MoC 19 01 51 -36 58.9           ~ 394 0
164 [TSO2000] N2H+A PoC ~ ~           ~ 1 0
165 [TSO2000] N2H+D PoC ~ ~           ~ 1 0
166 [TSO2000] N2H+C PoC ~ ~           ~ 1 0
167 [TSO2000] N2H+B PoC ~ ~           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.07.12-12:52:29

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