2009ApJ...697..769S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST15:13:44

2009ApJ...697..769S - Astrophys. J., 697, 769-786 (2009/May-3)

Discovery of the second warm carbon-chain-chemistry source, IRAS15398-3359 in Lupus.

SAKAI N., SAKAI T., HIROTA T., BURTON M. and YAMAMOTO S.

Abstract (from CDS):

We have conducted a search for carbon-chain molecules toward 16 protostars with the Mopra 22 m and Nobeyama 45 m telescopes, and have detected high excitation lines from several species, such as C4 H (N = 9-8), C4H2(J = 100,10-90,9), CH3CCH(J = 5-4, K = 2), and HC5N(J = 32-31), toward the low-mass protostar, IRAS15398-3359 in Lupus. The C4 H line is as bright as 2.4 K measured with the Nobeyama 45 m telescope. The kinetic temperature is derived to be 12.6±1.5 K from the K = 1 and K = 2 lines of CH3CCH. These results indicate that the carbon-chain molecules exist in a region of warm and dense gas near the protostar. The observed features are similar to those found toward IRAS04368+2557 in L1527, which shows warm carbon-chain chemistry (WCCC). In WCCC, carbon-chain molecules are produced efficiently by the evaporation of CH4 from the grain mantles in a lukewarm region near the protostar. Our data clearly indicate that WCCC is no longer specific to L1527, but occurs in IRAS15398-3359. In addition, we draw attention to a remarkable contrast between WCCC and hot corino chemistry in low-mass star-forming regions. Carbon-chain molecules are deficient in hot corino sources like NGC1333 IRAS4B, whereas complex organic molecules seem to be less abundant in the WCCC sources. A possible origin for such source-to-source chemical variations is suggested to arise from the timescale of the starless-core phase in each source. If this is the case, the chemical composition provides an important clue to explore the variation of star formation processes between sources and/or molecular clouds.

Abstract Copyright:

Journal keyword(s): ISM: individual: IRAS15398-3359 - ISM: molecules

CDS comments: IRAS15398-2259 is a misprint for IRAS15398-3359.

Simbad objects: 49

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Number of rows : 49

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 LDN 1448 DNe 03 22.5 +30 35           ~ 466 0
2 [SDA2014] West8 Y*O 03 25 36.22 +30 45 15.7           ~ 98 0
3 LDN 1448NA smm 03 25 36.49 +30 45 22.2           ~ 171 1
4 SSTc2d J032536.4+304522 Y*O 03 25 36.49 +30 45 22.2           ~ 186 1
5 [SDA2014] West4 Y*O 03 25 38.83 +30 44 06.2           ~ 242 1
6 NAME LDN 1448-mm Y*O 03 25 38.83 +30 44 06.2           ~ 301 0
7 IRAS 03258+3104 Y*O 03 28 55.30 +31 14 27.8           ~ 158 1
8 [JCC87] IRAS 2A Y*O 03 28 55.55 +31 14 36.7           ~ 390 3
9 [JCC87] IRAS 4A2 Y*O 03 29 10.413 +31 13 32.20           ~ 81 1
10 [JCC87] IRAS 4A Y*O 03 29 10.49 +31 13 30.8           ~ 596 1
11 [JCC87] IRAS 4A1 Y*O 03 29 10.510 +31 13 31.01           ~ 74 1
12 [JCC87] IRAS 4 FIR 03 29 10.9 +31 13 26           ~ 465 0
13 NGC 1333 OpC 03 29 11 +31 18.6           ~ 1219 1
14 [JCC87] IRAS 4B Y*O 03 29 12.058 +31 13 02.05           ~ 553 0
15 Barnard 1 MoC 03 33 16.3 +31 07 51           ~ 257 0
16 2MASS J03331667+3107548 Y*O 03 33 16.68 +31 07 54.9           ~ 102 2
17 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1061 0
18 NAME HH 211-mm Y*O 03 43 56.816 +32 00 50.06           ~ 54 1
19 IC 348 OpC 03 44 34 +32 09.8           ~ 1227 1
20 LDN 1521F DNe 04 28 39.3 +26 51 43           ~ 183 1
21 Bad 16 Y*O 04 30 50.2775823865 +23 00 08.771252817       14.95   F1 132 0
22 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 768 1
23 RAFGL 5123 FU* 04 31 34.07736 +18 08 04.9020           K3V/M3III 811 0
24 IRAS 04365+2535 Y*O 04 39 35.19360 +25 41 44.7252           ~ 237 0
25 LDN 1527 DNe 04 39 53 +25 45.0           ~ 495 0
26 IRAS 04368+2557 Y*O 04 39 53.97816 +26 03 09.6804           ~ 237 0
27 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3479 0
28 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1359 0
29 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2001 1
30 NAME Cha Dark Cloud SFR 11 55 -78.0           ~ 557 1
31 BHR 71 MoC 12 01 36.810 -65 08 49.22           ~ 119 0
32 NAME BHR 71 MM HII 12 01 37.1 -65 08 54           ~ 33 0
33 NAME Coalsack Nebula DNe 12 31 19 -63 44.6           ~ 242 0
34 Sandqvist 160 DNe 13 06.9 -77 01           ~ 41 0
35 WOS 48 C* 15 23 05.0744336371 -51 25 58.881494593   17.85 16.66 14.51 10.18 C 118 1
36 Barnard 228 cor 15 43 00.9 -34 08 48           ~ 64 0
37 NAME Lupus I Cld 15 43 02.1 -34 09 06           ~ 224 0
38 IRAS 15398-3359 Y*? 15 43 02.21016 -34 09 07.7112       18.38 21.72 ~ 128 0
39 NAME Lup Cloud SFR 16 03 -38.1           ~ 517 0
40 NAME rho Oph Complex reg 16 25 -23.5           ~ 76 1
41 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3027 0
42 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1035 1
43 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11542 0
44 LDN 483 DNe 18 17 35 -04 39.8           ~ 209 0
45 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 912 2
46 NAME Serpens SMM 4 cor 18 29 57.1 +01 13 15           ~ 123 0
47 NAME Aql Rift DNe 18 32 -01.0           ~ 234 1
48 V* R CrA Ae* 19 01 53.6850227874 -36 57 08.145519972 12.781 12.651 11.917 11.242 10.412 B5IIIpe 449 1
49 [NWA2005] SMM 1B Y*O 19 01 56.41 -36 57 28.0           ~ 78 1

    Equat.    Gal    SGal    Ecl

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2020.07.12-15:13:44

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