2011A&A...530A.123S


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.20CET09:08:47

2011A&A...530A.123S - Astronomy and Astrophysics, volume 530A, 123-123 (2011/6-1)

The X-ray puzzle of the L1551 IRS 5 jet.

SCHNEIDER P.C., GUENTHER H.M. and SCHMITT J.H.M.M.

Abstract (from CDS):

Protostars are actively accreting matter and they drive spectacular, dynamic outflows, which evolve on timescales of years. X-ray emission from these jets has been detected only in a few cases and little is known about its time evolution. We present a new Chandra observation of L1551 IRS5's jet in the context of all available X-ray data of this object. Specifically, we perform a spatially resolved spectral analysis of the X-ray emission and find that (a) the total X-ray luminosity is constant over almost one decade, (b) the majority of the X-rays appear to be always located close to the driving source, (c) there is a clear trend in the photon energy as a function of the distance to the driving source indicating that the plasma is cooler at larger distances and (d) the X-ray emission is located in a small volume which is unresolved perpendicular to the jet axis by [Chandra. A comparison of our X-ray data of the L1551 IRS5 jet both with models as well as X-ray observations of other protostellar jets shows that a base/standing shock is a likely and plausible explanation for the apparent constancy of the observed X-ray emission. Internal shocks are also consistent with the observed morphology if the supply of jet material by the ejection of new blobs is sufficiently constant. We conclude that the study of the X-ray emission of protostellar jet sources allows us to diagnose the innermost regions close to the acceleration region of the outflows.

Abstract Copyright:

Journal keyword(s): stars: winds, outflows - X-rays: ISM - Herbig-Haro objects - ISM: jets and outflows - ISM: individual objects: HH 154 - ISM: individual objects: L1551 IRS5

Simbad objects: 19

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Number of rows : 19

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 V* RY Tau TT* 04 21 57.4132838427 +28 26 35.533990877 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 634 1
2 V* DG Tau TT* 04 27 04.6913654419 +26 06 16.041555299 13.57 13.97 10.50 12.28   K6Ve 902 1
3 HH 28 HH 04 31 06.8 +18 03 28           ~ 91 0
4 HH 29 HH 04 31 26.9 +18 06 39           ~ 107 0
5 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 762 1
6 HH 154D PoC 04 31 33.60 +18 08 02.6           ~ 13 0
7 HH 154 HH 04 31 33.8 +18 08 02           ~ 64 1
8 HBC 393 FU* 04 31 34.077 +18 08 04.90           K3V/M3III 775 2
9 V* HL Tau TT* 04 31 38.437 +18 13 57.65   16.02 15.10 14.21   K5 1133 0
10 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 797 0
11 2MASS J04314444+1808315 Y*O 04 31 44.447 +18 08 31.54           ~ 142 1
12 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3323 0
13 V* RW Aur TT* 05 07 49.538 +30 24 05.07   10.86 9.60 9.95   K1/5e+K5e 696 0
14 HH 34 HH 05 35 31.30 -06 28 43.0     16     ~ 468 2
15 HH 2 HH 05 36.4 -06 47           ~ 335 1
16 V* Z CMa Ae* 07 03 43.1588002461 -11 33 06.230351311 10.51 9.99 8.80     B5/8eq+F5/7 519 3
17 PHK 1 PoC ~ ~           ~ 7 0
18 HH 154E PoC ~ ~           ~ 6 0
19 HH 154F PoC ~ ~           ~ 11 0

    Equat.    Gal    SGal    Ecl

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2019.11.20-09:08:47

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