2012A&A...537A.123R


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST12:22:35

2012A&A...537A.123R - Astronomy and Astrophysics, volume 537A, 123-123 (2012/1-1)

Radio continuum emission from knots in the DG Tauri jet.

RODRIGUEZ L.F., GONZALEZ R.F., RAGA A.C., CANTO J., RIERA A., LOINARD L., DZIB S.A. and ZAPATA L.A.

Abstract (from CDS):

HH 158, the jet from the young star DG Tau, is one of the few sources of its type where jet knots have been detected at optical and X-ray wavelengths. We aim to search for radio knots to compare them with the optical and X-ray knots. We also aim to model the emission from the radio knots. We analyzed archive data and also obtained new Very Large Array observations of this source, as well as an optical image to measure the present position of the knots. We furthermore modeled the radio emission from the knots in terms of shocks in a jet with intrinsically time-dependent ejection velocities. We detected radio knots in the 1996.98 and 2009.62 VLA data. These radio knots are, within error, coincident with optical knots. We also modeled satisfactorily the observed radio flux densities as shock features from a jet with intrinsic variability. All observed radio, optical, and X-ray knot positions can be intepreted as four successive knots, ejected with a period of 4.80-years and traveling away from the source with a velocity of 198km/s in the plane of the sky. The radio and optical knots are spatially correlated and our model can explain the observed radio flux densities. However, the X-ray knots do not appear to have optical or radio counterparts and their nature remains poorly understood.

Abstract Copyright:

Journal keyword(s): ISM: jets and outflows - radio continuum: ISM - stars: individual: DG Tau - Herbig-Haro objects

Simbad objects: 8

goto Full paper

goto View the reference in ADS

Number of rows : 8

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 QSO B0400+258 QSO 04 03 05.58606763 +26 00 01.5028075     18 19.00   ~ 182 1
2 NAME [BM89] L1495 PoC 04 14 08.2 +28 09 31           ~ 170 0
3 LDN 1495 DNe 04 18.1 +27 37           ~ 289 1
4 HH 702A HH 04 26 35.6278577396 +25 57 53.719025687           ~ 7 0
5 V* DG Tau Or* 04 27 04.6913654419 +26 06 16.041555299 13.57 13.97 10.50 12.28   K6Ve 923 1
6 HH 830A HH 04 27 37.3 +26 12 27           ~ 3 0
7 V* HP Tau Or* 04 35 52.7821592361 +22 54 23.158368128 17.39 14.9 14.90     K2-5e 190 0
8 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3479 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2012A&A...537A.123R and select 'bookmark this link' or equivalent in the popup menu


2020.07.12-12:22:35

© Université de Strasbourg/CNRS

    • Contact