2000AJ....120.1467W


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.06CET13:47:42

2000AJ....120.1467W - Astron. J., 120, 1467-1478 (2000/September-0)

Giant molecular outflows powered by protostars in L1448.

WOLF-CHASE G.A., BARSONY M. and O'LINGER J.

Abstract (from CDS):

We present sensitive (T*R~0.1 K), large-scale (47'x7'–corresponding to 4 pcx0.6 pc at the source) maps of the CO J=1⟶0 emission of the L1448 dark cloud at 55" resolution. These maps were acquired using the on-the-fly (OTF) capability of the NRAO 12 m telescope atop Kitt Peak in Arizona. CO outflow activity is seen in L1448 on parsec scales for the first time. Careful comparison of the spatial and velocity distribution of our high-velocity CO maps with previously published optical and near-infrared images and spectra has led to the identification of six distinct CO outflows. Three of these are powered by the Class 0 protostars, L1448C, L1448N(A), and L1448N(B). L1448 IRS 2 is the source of two more outflows, one of which is newly identified from our maps. The sixth newly discovered outflow is powered by an as yet unidentified source outside of our map boundaries. We show the direct link between the heretofore unknown, giant, highly collimated, protostellar molecular outflows and their previously discovered, distant optical manifestations. The outflows traced by our CO mapping generally reach the projected cloud boundaries. Integrated intensity maps over narrow velocity intervals indicate there is significant overlap of blue- and redshifted gas, suggesting the outflows are highly inclined with respect to the line of sight, although the individual outflow position angles are significantly different. The velocity channel maps also show that the outflows dominate the CO line cores as well as the high-velocity wings. The magnitude of the combined flow momenta, as well as the combined kinetic energy of the flows, are sufficient to disperse the 50 M NH3 cores in which the protostars are currently forming, although some question remains as to the exact processes involved in redirecting the directionality of the outflow momenta to effect the complete dispersal of the parent cloud.

Abstract Copyright:

Journal keyword(s): ISM: Individual: Alphanumeric: L1448 - ISM: Jets and Outflows - ISM: Kinematics and Dynamics - Methods: Observational - Stars: Formation

CDS comments: In ref. list, O'Linger et al. 1999, 698 misprint for 696 (1999ApJ...515..696O).

Simbad objects: 38

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Number of rows : 38

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           ~ 459 0
2 HH 267A HH 03 24 02.7 +31 00 26           ~ 2 0
3 HH 267B HH 03 24 02.7 +31 00 42           ~ 2 0
4 HH 267 HH 03 24 03.0 +31 00 29           ~ 6 0
5 HH 267C HH 03 24 04.1 +31 00 07           ~ 2 0
6 HH 193A HH 03 24 51.4 +30 55 40           ~ 4 0
7 HH 193B HH 03 24 52.9 +30 54 53           ~ 4 0
8 HH 193 HH 03 24.9 +30 54           ~ 6 0
9 HH 193C HH 03 24 54.2 +30 54 31           ~ 4 0
10 HH 194A HH 03 24 56.1 +30 47 43           ~ 3 0
11 HH 194B HH 03 24 57.0 +30 47 41           ~ 3 0
12 HH 194C HH 03 24 58.3 +30 47 43           ~ 2 0
13 HH 194 HH 03 24 58.6 +30 47 42           ~ 6 0
14 NAME LDN 1448 IRS 1 Em* 03 25 09.430 +30 46 21.58     19.5     ~ 87 0
15 HH 195A HH 03 25 11.9 +30 47 38           ~ 3 0
16 HH 196A HH 03 25 13.0 +30 49 22           ~ 2 0
17 HH 196B HH 03 25 13.4 +30 49 16           ~ 2 0
18 HH 196 HH 03 25 13.5 +30 49 18           ~ 6 0
19 HH 196C HH 03 25 14.8 +30 49 08           ~ 2 0
20 HH 195D HH 03 25 14.9 +30 46 56           ~ 3 0
21 HH 195E HH 03 25 15.1 +30 45 59           ~ 4 0
22 NAME LDN 1448 IRS 2 Y*O 03 25 22.32 +30 45 13.9           ~ 113 0
23 HH 196D HH 03 25 26.2 +30 46 54           ~ 3 0
24 LDN 1448NW Y*? 03 25 35.66 +30 45 34.2           ~ 58 0
25 [SDA2014] West8 Y*O 03 25 36.22 +30 45 15.7           ~ 93 0
26 LDN 1448NA smm 03 25 36.49 +30 45 22.2           ~ 170 1
27 IRAS 03225+3034 FIR 03 25 36.49 +30 45 22.2           ~ 149 1
28 SSTc2d J032536.4+304522 Y*O 03 25 36.49 +30 45 22.2           ~ 184 1
29 HH 197 HH 03 25 36.7 +30 44 00           ~ 10 0
30 [BCM90] B3 blu 03 25 36.8 +30 45 18           ~ 5 0
31 NAME LDN 1448-mm Y*O 03 25 38.83 +30 44 06.2           ~ 294 0
32 [SDA2014] West4 Y*O 03 25 38.83 +30 44 06.2           ~ 241 1
33 [BCM90] R3 red 03 25 42 +30 42.7           ~ 5 0
34 HH 277 HH 03 26 04.6 +30 39 20           ~ 6 0
35 NGC 1333 SFR 03 28 55 +31 22.2   10.9       ~ 1184 1
36 NAME Circinus Cloud Cld 15 02 -63.0           ~ 29 0
37 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2943 0
38 NAME Ser Nebula RNe 18 29 56 +01 14.8           ~ 29 1

    Equat.    Gal    SGal    Ecl

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2019.12.06-13:47:42

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