2018A&A...612A..73C


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.14CET00:48:02

2018A&A...612A..73C - Astronomy and Astrophysics, volume 612A, 73-73 (2018/4-1)

Binary energy source of the HH 250 outflow and its circumstellar environment.

COMERON F., REIPURTH B., YEN H.-W. and CONNELLEY M.S.

Abstract (from CDS):


Aims. Herbig-Haro flows are signposts of recent major accretion and outflow episodes. We aim to determine the nature and properties of the little-known outflow source HH 250-IRS, which is embedded in the Aquila clouds.
Methods. We have obtained adaptive optics-assisted L-band images with the NACO instrument on the Very Large Telescope (VLT), together with N- and Q-band imaging with VISIR also on the VLT. Using the SINFONI instrument on the VLT we carried out H- and K-band integral field spectroscopy of HH 250-IRS, complemented with spectra obtained with the SpeX instrument at the InfraRed Telescope Facility (IRTF) in the JHKL bands. Finally, the SubMillimeter Array (SMA) interferometer was used to study the circumstellar environment of HH 250-IRS at 225 and 351GHz with CO (2-1) and CO (3-2) maps and 0.9mm and 1.3mm continuum images.
Results. The HH 250-IRS source is resolved into a binary with 0.53'' separation, corresponding to 120 AU at the adopted distance of 225 pc. The individual components show heavily veiled spectra with weak CO absorption indicative of late-type stars. Both are Class I sources, but their spectral energy distributions between 1.5µm and 19µm differ markedly and suggest the existence of a large cavity around one of the components. The millimeter interferometric observations indicate that the gas mainly traces a circumbinary envelope or disk, while the dust emission is dominated by one of the circumstellar envelopes.
Conclusions. HH 250-IRS is a new addition to the handful of multiple systems where the individual stellar components, the circumstellar disks and a circumbinary disk can be studied in detail, and a rare case among those systems in which a Herbig-Haro flow is present.

Abstract Copyright: © ESO 2018

Journal keyword(s): circumstellar matter - stars: winds, outflows - stars: individual: IRAS 19190+1048 - stars: pre-main sequence - ISM: jets and outflows - binaries: general

CDS comments: Cloud B not identified.

Simbad objects: 17

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Number of rows : 17

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* V1213 Tau Or* 04 31 37.472 +18 12 24.48   19.78       K7 505 0
2 2MASS J04314444+1808315 Y*O 04 31 44.447 +18 08 31.54           ~ 141 1
3 V* GG Tau TT* 04 32 30.3318954228 +17 31 40.834888327 14.84 14.78 13.40 11.54   M0e+M2.0e 617 1
4 V* UY Aur TT* 04 51 47.3900418279 +30 47 13.552212742 12.82 12.96 11.90 10.59 9.52 M0e+M2.5e 321 0
5 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2636 2
6 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 785 1
7 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 884 2
8 NAME Aql Rift DNe 18 32 -01.0           ~ 216 1
9 HH 32 HH 19 20 30 +11 02.0           ~ 105 1
10 EM* AS 353 Or* 19 20 30.9919486938 +11 01 54.604157558   13.22 12.21     K5 176 1
11 LDN 673 DNe 19 20 54.4 +11 13 12           ~ 66 0
12 IRAS 19188+1050 * 19 21 11.9917550684 +10 56 47.850541658           ~ 1 0
13 HH 250 HH 19 21 13.6 +10 52 31           ~ 3 0
14 NAME HH 250-IRS HII 19 21 22.62816 +10 53 56.9652           ~ 5 0
15 2MASS J19212367+1054108 IR 19 21 23.67432 +10 54 10.8684           ~ 1 0
16 HD 187961 Be* 19 52 15.58159 +10 21 05.7155 6.13 6.476 6.503     B7V+A5V 40 1
17 NAME Aql Region reg ~ ~           ~ 282 0

    Equat.    Gal    SGal    Ecl

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2019.11.14-00:48:02

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