2001AJ....121.3191I

Query : 2001AJ....121.3191I

2001AJ....121.3191I - Astron. J., 121, 3191-3206 (2001/June-0)

K-band spectroscopy of luminous young stellar objects.

ISHII M., NAGATA T., SATO S., YAO Y., JIANG Z. and NAKAYA H.

Abstract (from CDS):

We present spectroscopy from 2.0 to 2.33 µm of 32 luminous young stellar objects (YSOs), which are presumed to be precursors of Herbig Ae/Be stars. From these stars, Brγ, H2, CO, He I, and Fe II were found in emission with detection rates of 97%, 34%, 22%, 9%, and 3%, respectively. We compare the spectral features with those of Herbig Ae/Be stars in the literature to investigate the spectral behavior of intermediate- to high-mass YSOs and to search for their relations to the spectral energy distributions (SEDs). H2 emission is detected only in Class I SEDs with particularly large spectral indices. The detection of H2 emission is related to the degree of the dispersal of circumstellar envelopes, where H2 molecules are probably excited by shocks from outflows. On the other hand, Brγ emission, which is generally thought to occur in stellar winds close to the stars, does not depend on the SEDs. This indicates that stellar wind from luminous YSOs does not change much from the embedded phase to the optically visible phase. CO emission is also independent of the SEDs, but the detection rate is much lower than that of Brγ emission. Probably, more specific physical conditions regarding circumstellar disks and stellar radiation are necessary for CO emission to take place.

Abstract Copyright: ∼

Journal keyword(s): Stars: Circumstellar Matter - ISM: Dust, Extinction - Stars: Pre-Main-Sequence

Nomenclature: Appendix: [INS2001] JHHMMSS.s+DDMMSS N=4+7.

CDS comments: Par. 4.1.1., CPD -57 2824 misprint for CPD -57 2874.

Simbad objects: 75

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Number of rows : 75
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 2MASS J00235704+6605515 Y*O 00 23 57.0500557536 +66 05 51.747059688           ~ 28 0
2 V* NX Cas Y*O 00 38 59.3657735875 +59 27 47.791100439           ~ 19 0
3 HD 6416 PM* 01 06 22.8172090848 +62 45 41.003774496   6.720 6.523     A5Vn 44 0
4 2MASS J01175302+6427142 Y*O 01 17 53.0277209359 +64 27 14.289051463           ~ 17 0
5 [KSP2003] J024825.61+605508.0 Y*O 02 48 25.61 +60 55 08.0           ~ 12 0
6 2MASS J02482571+6055051 Y*? 02 48 25.712 +60 55 05.17           ~ 4 0
7 IRAS 02497+6217 Y*O 02 53 43.4742904968 +62 29 23.012157228           ~ 14 0
8 2MASS J03172668+6009412 Y*O 03 17 26.68 +60 09 41.3           ~ 22 0
9 V* V512 Per Or* 03 29 03.7578170808 +31 16 03.947525688           M3.5 419 0
10 RAFGL 5113 Or* 04 10 11.8514463792 +50 59 54.681713664           ~ 29 0
11 IRAS 04239+2436 Y*O 04 26 56.29704 +24 43 35.3280           ~ 163 0
12 EM* LkHA 101 Em* 04 30 14.4355820328 +35 16 23.983198932   17.91 15.71 13.33   F 376 1
13 HD 29526 PM* 04 41 24.1285097472 +48 18 03.165290280   5.642 5.652     A0V 66 0
14 IRAS 04579+4703 Y*O 05 01 39.661 +47 07 21.92           ~ 51 0
15 2MASS J05171285+3922187 * 05 17 12.8529809112 +39 22 18.788094372           ~ 1 0
16 IRAS 05137+3919 Cld 05 17 13.3 +39 22 14           ~ 75 0
17 Cl* NGC 1893 CUF 1256 Ae? 05 23 07.5852091320 +33 28 37.602838452 13.07 13.97 13.770 13.340 12.883 ~ 13 0
18 IRAS 05198+3325 Y*O 05 23 08.244 +33 28 34.01   14.45 15.734 15.442 14.085 B1.5Ve 26 0
19 CPM 18 Y*O 05 38 47.2 +30 41 28           ~ 26 0
20 * ome Ori Be* 05 39 11.1457980782 +04 07 17.288290296 3.73 4.48 4.59 4.57 4.67 B3Ve 424 1
21 CPM 05439+3035 N Y*O 05 47 12.19 +30 36 15.3           ~ 4 0
22 [TPB97] Gy 2-18 9 IR 05 47 12.34 +30 36 12.4           ~ 3 0
23 [TPB97] Gy 2-18 11 * 05 47 12.54 +30 36 13.9           B 3 0
24 HD 39182 * 05 52 39.6643545288 +39 34 28.936608816 6.570 6.480 6.390     A2V 46 0
25 IRAS 05568+3206 Y*O 06 00 04.99320 +32 06 31.8276           ~ 20 0
26 HD 40588 * 06 01 10.0410808248 +31 02 04.262019612 6.360 6.280 6.190     A3VkA0.5mA0_lB 49 0
27 IRAS 06040+2958 Or* 06 07 15.3938177424 +29 57 55.038550716   15.3 14.0     B2 26 0
28 EM* MWC 790 Em* 06 07 23.9375292000 +30 11 44.321473428   13.24 12.58 12.48   Be 19 0
29 2MASS J06235631+1430280 Or* 06 23 56.3104143768 +14 30 28.091289924 15.67 15.67 14.67     B2 34 0
30 IRAS 06294+0352 Y*O 06 32 07.5169232496 +03 50 07.586020356           ~ 17 0
31 HD 259431 Ae* 06 33 05.1906369144 +10 19 19.982565336 8.39 8.95 8.72     B6ep 299 1
32 HD 46251 * 06 33 42.6490858464 +33 01 26.543941680 6.660 6.580 6.530   6.46 A3V 42 0
33 KHA 39 Y*O 06 36 22.3196567400 +10 54 44.007785640       16.15   ~ 11 0
34 2MASS J06374159-0058376 Y*O 06 37 41.5966904565 -00 58 37.643706888           ~ 11 0
35 2MASX J06560633+0033477 Y*O 06 56 06.336 +00 33 47.70           ~ 11 0
36 PN MaC 1-1 Ae? 06 58 44.3623639536 -03 41 09.981124008   16.23 15.0     O9?e 40 1
37 HD 52479 * 07 01 41.4426938400 +04 49 05.142278676   6.673 6.626     A1III 37 0
38 HD 52913 * 07 03 17.9142304872 +09 08 18.088217988   6.081 5.953     A3Vs 38 0
39 HD 53367 Ae* 07 04 25.5189757244 -10 27 15.613478141 6.81 7.40 6.96 7.92   B0IV/Ve 330 0
40 * del Mon * 07 11 51.8604729967 -00 29 33.961811515   4.14 4.15     A0IV 101 0
41 HD 58580 SB* 07 26 03.3869305824 -04 32 14.612685396   6.754 6.766     B8V 36 0
42 CD-57 3107 LP? 10 15 21.9721722816 -57 51 42.738609492 12.27 11.72 10.15 9.78   M3 44 0
43 HD 94878 ** 10 55 58.9149262296 -60 23 33.436864428 8.67 9.37 8.70 8.07   B0/2eq 159 0
44 WL 16 Y*O 16 27 02.33520 -24 37 27.2316           A0-F3 164 0
45 CD-42 11721 Be* 16 59 06.7629322176 -42 42 08.404228224 12.16 12.28 11.00     B0IVe 179 0
46 EM* MWC 297 Ae* 18 27 39.5265500160 -03 49 52.133050776 15.57 14.34 12.31 11.34   B1.5Ve 315 0
47 V* WW Vul Ae* 19 25 58.7494120560 +21 12 31.333658616 11.46 10.99 10.25 10.38 10.12 A2IVe 237 0
48 ZTF J194254.98+232414.7 Or* 19 42 54.9815013888 +23 24 14.763419640     15     ~ 47 1
49 GAL 060.88-00.13 HII 19 46 20.13 +24 35 29.4           ~ 13 1
50 NAME SH 2-87 IRS 1 HII 19 46 20.130 +24 35 29.43           ~ 17 0
51 SH 2-87 bub 19 46 20.69 +24 35 15.4           ~ 161 2
52 HD 190590 ** 20 04 58.5864082032 +23 12 37.359259920 6.780 6.700 6.530     A5Vn 36 0
53 HD 193702 ** 20 20 15.21965 +39 24 11.5969           A1V 94 0
54 EM* LkHA 224 Ae* 20 20 29.3503944888 +41 21 28.410038964 14.82 14.08 12.93 14.105 11.08 A4:Ve 106 0
55 CPM 35 cor 20 23 23.855 +41 17 40.49           ~ 58 0
56 JCMTSF J202528.1+410812 * 20 25 27.8 +41 08 20           ~ 10 0
57 NAME SH 2-106 IR Y*O 20 27 26.502 +37 22 42.03           ~ 168 1
58 IRAS 20266+3544 Y*O 20 28 34.2437845560 +35 54 17.383789044           ~ 12 0
59 [INS2001] J202904.3+403201 * 20 29 04.3 +40 32 01           ~ 1 0
60 CPM P13 * 20 29 04.9 +40 31 58           ~ 11 0
61 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 837 0
62 HD 197120 ** 20 40 36.2777653392 +29 48 19.991773368 6.300 6.190 6.030   5.87 A2V 41 0
63 V* PV Cep Or* 20 45 53.9540390184 +67 57 38.679941304   19.27 17.46 15.98 14.60 A5 282 1
64 2MASS J21314407+5115363 * 21 31 44.0755160544 +51 15 36.287176860           ~ 1 0
65 2MASS J21314511+5115353 * 21 31 45.11 +51 15 35.3           ~ 10 0
66 PN K 4-45 Y*O 21 35 21.061 +53 47 11.21           ~ 57 2
67 V* V645 Cyg Ae* 21 39 58.2745507632 +50 14 21.042184668   14.23 13.10 13.82   O6/9eq 279 0
68 NAME IRAS 21413+5442S HII 21 41 21.22 +54 42 32.0           ~ 3 0
69 [INS2001] J214300.9+545619 * 21 43 00.9 +54 56 19           ~ 1 0
70 2MASS J21430143+5456183 Y*O 21 43 01.4400 +54 56 17.800           ~ 64 2
71 IRAS 21558+5907 Y*O 21 57 25.2013300135 +59 21 56.651665029           ~ 28 0
72 HD 210715 PM* 22 11 09.8935953888 +50 49 24.294385812   5.517 5.377     A5V 57 0
73 HD 214279 * 22 35 51.9941061576 +56 04 14.069041068   6.464 6.373     A3V 47 0
74 CPM 38 Y*O 22 55 59.780 +58 14 42.49           ~ 43 0
75 CPM 40 LP* 23 41 25.2212789088 +65 40 42.500854020       15.631   ~ 15 1

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