2007ApJ...669..493W


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.17CEST00:47:49

2007ApJ...669..493W - Astrophys. J., 669, 493-518 (2007/November-1)

A combined Spitzer and Chandra survey of young stellar objects in the Serpens cloud core.

WINSTON E., MEGEATH S.T., WOLK S.J., MUZEROLLE J., GUTERMUTH R., HORA J.L., ALLEN L.E., SPITZBART B., MYERS P. and FAZIO G.G.

Abstract (from CDS):

We present Spitzer and Chandra observations of the nearby (∼260 pc) embedded stellar cluster in the Serpens cloud core. We observed, using Spitzer's IRAC and MIPS instruments, in six wavelength bands from 3 to 70 µm, to detect thermal emission from circumstellar disks and protostellar envelopes and to classify stars using color-color diagrams and SEDs. These data are combined with Chandra observations to examine the effects of circumstellar disks on stellar X-ray properties. Young diskless stars were also identified from their increased X-ray emission. We have identified 138 YSOs in Serpens: 22 Class 0/I, 16 flat-spectrum, 62 Class II, 17 transition disk, and 21 Class III stars; 60 of these exhibit X-ray emission. Our primary results are the following: (1) 10 protostars detected previously in the submillimeter are detected at λ<24 µm, seven at λ<8 µm; (2) the protostars are more closely grouped than more evolved YSOs (median protostar separation ∼0.024 pc); and (3) the luminosity and temperature of the X-ray-emitting plasma around these YSOs do not show any significant dependence on evolutionary class. We combine the infrared-derived values of AK and X-ray values of NH for eight Class III objects and find that the column density of hydrogen gas per magnitude of extinctions is less than half the standard interstellar value, for AK>1. This may be the result of grain growth through coagulation and/or the accretion of volatiles in the Serpens cloud core.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - Infrared: Stars - Stars: Pre-Main-Sequence - X-Rays: Stars

VizieR on-line data: <Available at CDS (J/ApJ/669/493): table3.dat table4.dat>

Nomenclature: Table 3: [WMW2007] NNN N=137 among (Nos 1-225).

Simbad objects: 154

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Number of rows : 154

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 NGC 1333 OpC 03 29 11 +31 18.6           ~ 1268 1
2 IC 348 OpC 03 44 34 +32 09.8           ~ 1257 1
3 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2060 1
4 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 502 0
5 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3186 1
6 GUM 53 HII 16 40 00.1 -48 51 45           ~ 89 1
7 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12257 0
8 2MASS J18290427+0118387 Y*O 18 29 04.277 +01 18 38.75           ~ 1 0
9 2MASS J18290581+0113228 Y*O 18 29 05.8013612773 +01 13 22.467745620           ~ 1 0
10 2MASS J18290819+0105444 Y*O 18 29 08.1889414928 +01 05 44.449817625           K6.5 8 0
11 2MASS J18291302+0107007 Y*O 18 29 13.0309623519 +01 07 00.697038722           M3.5 3 0
12 2MASS J18291434+0107299 Y*O 18 29 14.3415489018 +01 07 29.737570765           M4.0 8 0
13 2MASS J18291636+0108216 Y*O 18 29 16.3545092589 +01 08 21.425866912           ~ 2 0
14 2MASS J18291888+0114174 Y*O 18 29 18.886 +01 14 17.48           ~ 3 0
15 2MASS J18292043+0121036 Y*O 18 29 20.433 +01 21 03.61           M0.5 9 0
16 2MASS J18292108+0124067 Y*O 18 29 21.0890386407 +01 24 06.513807610           ~ 1 0
17 2MASS J18292272+0110329 Y*O 18 29 22.7210572376 +01 10 32.914622310   18.0   15.1   K7.5 8 0
18 [GFM2007] 6 Y*O 18 29 29.80 +01 21 57.4           ~ 4 0
19 2MASS J18293165+0115054 Y*O 18 29 31.6609309482 +01 15 05.465135060           ~ 1 0
20 ESO-HA 279a cor 18 29 31.976 +01 18 42.59           K6.5 29 1
21 [WMW2007] 75 Y*O 18 29 32.24 +01 12 39.9           ~ 1 0
22 [SVS76] Ser 14 Y*O 18 29 33.0699960697 +01 17 16.469185194   17.9   15.0   G2.5 14 0
23 2MASS J18293338+0108242 Y*O 18 29 33.3827559572 +01 08 24.194685909           A7.0 12 0
24 2MASS J18293521+0113108 Y*O 18 29 35.2066930668 +01 13 11.008330307           M5.5 5 0
25 [KOB2004] 189 Y*O 18 29 37.5967247815 +01 11 17.251104165           M2.0 6 0
26 [KOB2004] 190 Y*O 18 29 37.6897224229 +01 11 29.790614582           M2.0 9 0
27 2MASS J18293818+0109173 Y*O 18 29 38.1935688749 +01 09 17.423937674           ~ 2 0
28 [WMW2007] 115 Y*O 18 29 38.59 +01 18 01.4           ~ 1 0
29 2MASS J18293987+0117559 Y*O 18 29 39.8730587848 +01 17 55.890063693           M1.5 12 0
30 2MASS J18294147+0107378 Y*O 18 29 41.4745026391 +01 07 37.869168699           K2.5 15 0
31 2MASS J18294151+0110040 Y*O 18 29 41.5309617121 +01 10 04.239669315           M4.0 8 0
32 2MASS J18294217+0120209 Y*O 18 29 42.176 +01 20 20.99           ~ 7 0
33 2MASS J18294234+0112019 Y*O 18 29 42.349 +01 12 01.97           M7.0 5 0
34 2MASS J18294393+0107208 Y*O 18 29 43.9378583921 +01 07 20.714617731           K7.0 13 0
35 2MASS J18294430+0104534 Y*O 18 29 44.3144872544 +01 04 53.425155429           M9.0 13 0
36 2MASS J18294453+0113113 Y*O 18 29 44.538 +01 13 11.35           M4.5 13 0
37 2MASS J18294629+0110252 Y*O 18 29 46.2880829036 +01 10 25.327029216           M2.0 10 0
38 2MASS J18294702+0116267 Y*O 18 29 47.023 +01 16 26.77           ~ 12 0
39 2MASS J18294722+0107157 Y*O 18 29 47.2276470070 +01 07 15.606099414           M8.7 6 0
40 2MASS J18294723+0122346 Y*O 18 29 47.2327165702 +01 22 34.631996337   19.8   16.0   M2.5 7 0
41 [HL2013] 277.44847+01.07288 Y*O 18 29 47.6507310204 +01 04 22.026644744           ~ 6 0
42 SH 2-68 N Y*O 18 29 48.09 +01 16 45.0           ~ 113 1
43 [WM2000] S68Nc PoC 18 29 48.710 +01 16 57.00           ~ 7 0
44 2MASS J18294878+0113422 Y*O 18 29 48.787 +01 13 42.22           ~ 11 0
45 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 975 2
46 IRAS 18272+0114 Or* 18 29 49.13016 +01 16 20.6472           ~ 65 1
47 V* V370 Ser Or* 18 29 49.24584 +01 16 31.5480           ~ 27 0
48 2MASS J18294949+0112041 Y*O 18 29 49.4879888552 +01 12 04.189850795           ~ 1 0
49 2MASS J18294960+0117058 Y*O 18 29 49.602 +01 17 05.83           ~ 29 0
50 NAME SH 2-68 FIR 1 cor 18 29 49.63 +01 15 21.9           ~ 244 2
51 SSTc2d J182949.6+011456 Y*O 18 29 49.70 +01 14 56.7           ~ 14 0
52 2MASS J18295053+0108580 Y*O 18 29 50.5399141945 +01 08 57.953365294           M4.5 5 0
53 2MASS J18295118+0113196 Y*O 18 29 51.186 +01 13 19.62           ~ 15 0
54 V* V371 Ser Or* 18 29 51.21240 +01 16 39.4860           ~ 97 1
55 2MASS J18295145+0109327 Y*O 18 29 51.4526857432 +01 09 32.736577724           M5.0 3 0
56 NAME Serpens SMM 10 IR Y*O 18 29 52.20 +01 15 47.6           ~ 43 1
57 [GFM2007] 32 Y*O 18 29 52.20 +01 15 59.0           ~ 7 0
58 [ACA2003] Ser B 1 Y*O 18 29 52.85 +01 14 56.1           ~ 17 1
59 2MASS J18295310+0106177 Y*O 18 29 53.1062132345 +01 06 17.774181573           M4.5 8 0
60 2MASS J18295317+0112275 BD* 18 29 53.176 +01 12 27.55           L 14 0
61 2MASS J18295354+0113051 Y*O 18 29 53.5526065764 +01 13 05.170955827           ~ 8 0
62 2MASS J18295360+0117017 Y*O 18 29 53.6097296564 +01 17 01.723303599   19.7   16.6   M2.0 19 0
63 2MASS J18295384+0113305 Y*O 18 29 53.845 +01 13 30.58           ~ 13 0
64 2MASS J18295387+0112473 Y*O 18 29 53.870 +01 12 47.33           ~ 4 0
65 2MASS J18295409+0107108 Y*O 18 29 54.0964209403 +01 07 10.778321157           ~ 9 0
66 2MASS J18295452+0114469 Y*O 18 29 54.5186985049 +01 14 46.980796667           M8.0 10 0
67 2MASS J18295520+0113222 Y*O 18 29 55.200 +01 13 22.21           ~ 16 0
68 2MASS J18295536+0110340 Y*O 18 29 55.3660225875 +01 10 33.904046562           M5.0 8 0
69 2MASS J18295553+0108341 Y*O 18 29 55.536 +01 08 34.10           ~ 2 0
70 2MASS J18295571+0114315 Y*O 18 29 55.711 +01 14 31.50           ~ 38 0
71 2MASS J18295618+0110574 Y*O 18 29 56.1834736704 +01 10 57.458848349           K5.0 8 0
72 [WMW2007] 112 Y*O 18 29 56.28 +01 13 21.1           ~ 1 0
73 2MASS J18295635+0112180 Y*O 18 29 56.3573614586 +01 12 18.127372547           M8.5 11 0
74 2MASS J18295655+0112596 Y*O 18 29 56.553 +01 12 59.65           ~ 22 0
75 2MASS J18295667+0112393 Y*O 18 29 56.674 +01 12 39.32           ~ 19 0
76 HBC 672 Em* 18 29 56.8828626544 +01 14 46.339137067   17.6       K8.0 100 0
77 2MASS J18295696+0112478 Y*O 18 29 56.967 +01 12 47.83           M3.0 25 0
78 NAME Serpens Cluster As* 18 29 57 +01 14.4           ~ 60 0
79 NAME Serpens SMM 4 cor 18 29 57.1 +01 13 15           ~ 128 0
80 2MASS J18295741+0114503 Y*O 18 29 57.4123268031 +01 14 50.191039065           M2.0 16 0
81 HD 170545B Y*O 18 29 57.5759105889 +01 10 47.047427369   9.82 9.58     A1-A8V-IIIe 9 0
82 2MASS J18295760+0113004 Y*O 18 29 57.602 +01 13 00.42           ~ 35 3
83 HD 170545 ** 18 29 57.66 +01 10 53.6           B9V 17 0
84 2MASS J18295766+0113045 Y*O 18 29 57.661 +01 13 04.57           ~ 21 1
85 HD 170545A Y*O 18 29 57.6614831670 +01 10 53.606581241   8.617 8.470 8.96   A1-A3Ve 16 0
86 IRAS 18274+0112 Y*O 18 29 57.73680 +01 14 05.6940           M4: 137 2
87 2MASS J18295781+0115318 Y*O 18 29 57.816 +01 15 31.86           K2.0 21 0
88 2MASS J18295781+0112280 Y*O 18 29 57.819 +01 12 28.05           ~ 20 0
89 2MASS J18295784+0112379 Y*O 18 29 57.849 +01 12 37.90           ~ 23 0
90 2MASS J18295785+0112514 Y*O 18 29 57.858 +01 12 51.40           ~ 59 3
91 [EC92] 95 Y*O 18 29 57.893 +01 12 46.25           K1.0 72 3
92 2MASS J18295820+0115216 Y*O 18 29 58.2037104611 +01 15 21.603460135           K7.0 38 0
93 2MASS J18295844+0112502 Y*O 18 29 58.446 +01 12 50.21           ~ 11 0
94 2MASS J18295876+0114257 Y*O 18 29 58.765 +01 14 25.78           ~ 24 1
95 GCNM 115 Y*O 18 29 59.02 +01 12 24.9           ~ 13 0
96 2MASS J18295907+0111137 Y*O 18 29 59.075 +01 11 13.72           ~ 2 0
97 2MASS J18295913+0111200 Y*O 18 29 59.1310730425 +01 11 20.076739566           M5.0 12 0
98 CK 8 TT* 18 29 59.2453367145 +01 14 07.606895690   19.7   16.9   K7.5 29 0
99 SSTc2d J182959.3+011041 Y*O 18 29 59.38 +01 10 40.9           ~ 12 0
100 SSTc2d J182959.5+011159 cor 18 29 59.573 +01 11 58.39           ~ 23 0
101 [GFM2007] 61 Y*O 18 29 59.61 +01 14 12.3           ~ 5 0
102 NAME SERPENS SMM 3 smm 18 29 59.7 +01 14 00           ~ 86 1
103 SSTc2d J182959.9+011311 Y*O 18 29 59.92 +01 13 11.6           ~ 16 1
104 2MASS J18300009+0103057 Y*O 18 30 00.0859927555 +01 03 05.586493968           M2.0 8 0
105 2MASS J18300020+0114035 Y*O 18 30 00.206 +01 14 03.56           ~ 14 0
106 SSTc2d J183000.3+010944 Y*O 18 30 00.30 +01 09 44.7           ~ 11 0
107 NAME Serpens SMM 11 smm 18 30 00.3 +01 11 42           ~ 23 0
108 JCMTSE J183000.2+011251 Y*O 18 30 00.4 +01 12 50           ~ 51 0
109 CK 2 Y*O 18 30 00.618 +01 15 20.12           K5-M0III 52 0
110 2MASS J18300065+0113402 Y*O 18 30 00.6479615718 +01 13 40.113500422           M0.5 25 0
111 [ACA2003] Ser A 7 cor 18 30 00.68 +01 13 01.2           ~ 17 1
112 2MASS J18300091+0122036 Y*O 18 30 00.9151785969 +01 22 03.543720048           ~ 1 0
113 2MASS J18300111+0113242 Y*O 18 30 01.110 +01 13 24.24           ~ 13 0
114 2MASS J18300124+0115036 Y*O 18 30 01.245 +01 15 03.61           ~ 10 0
115 2MASS J18300153+0115150 Y*O 18 30 01.5363244744 +01 15 15.048624036           ~ 16 0
116 2MASS J18300168+0104430 Y*O 18 30 01.682 +01 04 43.02           ~ 6 0
117 [WMW2007] 118 Y*O 18 30 01.79 +01 18 59.8           ~ 1 0
118 [CED93] 8 smm 18 30 01.8 +01 15 07           ~ 17 0
119 2MASS J18300209+0113587 Y*O 18 30 02.095 +01 13 58.79           ~ 20 0
120 [WMW2007] 109 Y*O 18 30 02.31 +01 08 08.8           ~ 4 0
121 [GMM2009] Serpens 76 Y*O 18 30 02.480 +01 12 43.44           ~ 2 0
122 2MASS J18300274+0112280 Y*O 18 30 02.747 +01 12 28.06           ~ 27 2
123 2MASS J18300304+0119499 Y*O 18 30 03.0316984387 +01 19 49.595701498           ~ 1 0
124 2MASS J18300341+0116191 Y*O 18 30 03.4139495304 +01 16 19.088787966   18.9   15.0   M0.0 41 0
125 2MASS J18300359+0116408 Y*O 18 30 03.595 +01 16 40.87           ~ 7 0
126 2MASS J18300410+0106556 Y*O 18 30 04.103 +01 06 55.68           ~ 6 0
127 2MASS J18300491+0114393 Y*O 18 30 04.9156118137 +01 14 39.332158291           M5.0 13 0
128 2MASS J18300502+0112360 Y*O 18 30 05.022 +01 12 36.07           M9.0 12 0
129 2MASS J18300549+0114248 Y*O 18 30 05.4965182605 +01 14 24.724439763           M5.0 5 0
130 2MASS J18300610+0106170 Y*O 18 30 06.1029526156 +01 06 16.935486714   19.0   16.5   M1.0 12 0
131 2MASS J18300770+0112043 Y*O 18 30 07.708 +01 12 04.32           M2.5 15 0
132 2MASS J18300922+0117526 Y*O 18 30 09.2247042166 +01 17 52.466475327           M4.5 9 0
133 2MASS J18300944+0102470 Y*O 18 30 09.4479161450 +01 02 47.026003959           M3.5 8 0
134 2MASS J18301111+0112379 Y*O 18 30 11.1152539445 +01 12 38.034644989           M4.0 10 0
135 2MASS J18301329+0102488 Y*O 18 30 13.2955478770 +01 02 48.783235195           M4.0 9 0
136 2MASS J18301397+0108512 Y*O 18 30 13.9768637262 +01 08 51.331890087           M5.0 11 0
137 2MASS J18301442+0104061 Y*O 18 30 14.4378960672 +01 04 06.090204311           ~ 3 0
138 2MASS J18301680+0119169 Y*O 18 30 16.8013037615 +01 19 17.089582390           ~ 1 0
139 2MASS J18301699+0113074 Y*O 18 30 16.991 +01 13 07.47           ~ 7 0
140 2MASS J18301730+0121325 Y*O 18 30 17.3012795021 +01 21 32.629996174           ~ 5 0
141 2MASS J18301818+0114167 Y*O 18 30 18.1871932645 +01 14 16.725773201           M0.0 14 0
142 [WMW2007] 181 Y*O 18 30 19.60 +01 05 34.3           ~ 3 0
143 2MASS J18302240+0120439 Y*O 18 30 22.4032466588 +01 20 43.872279492           M1.0 11 0
144 2MASS J18302276+0113234 Y*O 18 30 22.7660756165 +01 13 23.534320664           ~ 2 0
145 2MASS J18302283+0116213 Y*O 18 30 22.833 +01 16 21.37           ~ 1 0
146 2MASS J18302312+0120097 Y*O 18 30 23.1272366449 +01 20 09.613885462   19.5   16.8   M3.5 9 0
147 2MASS J18302343+0105045 Y*O 18 30 23.435 +01 05 04.57           M4.5 11 0
148 2MASS J18302446+0119505 Y*O 18 30 24.4655497995 +01 19 50.566398094           A3.0 4 0
149 2MASS J18302768+0122348 Y*O 18 30 27.6858661247 +01 22 34.447947945           M5.0 3 0
150 2MASS J18303733+0116086 Y*O 18 30 37.3410918029 +01 16 08.639731428           ~ 1 0
151 2MASS J18304116+0113156 Y*O 18 30 41.1726536170 +01 13 15.622523793           M7.5 4 0
152 2MASS J18304449+0123303 Y*O 18 30 44.4930129489 +01 23 30.282504231           ~ 1 0
153 2MASS J18305370+0111206 Y*O 18 30 53.7222609393 +01 11 20.535015924           ~ 1 0
154 NAME Coronet Cluster Cl* 19 01 54 -36 57.2           ~ 82 1

    Equat.    Gal    SGal    Ecl

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2021.06.17-00:47:49

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