2009ApJ...694..697U


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST04:53:17

2009ApJ...694..697U - Astrophys. J., 694, 697-703 (2009/March-3)

The dusty nebula surrounding HR Car: a Spitzer view.

UMANA G., BUEMI C.S., TRIGILIO C., HORA J.L., FAZIO G.G. and LETO P.

Abstract (from CDS):

We present mid-IR observations of the Galactic Luminous Blue Variable (LBV) HR Car and its associated nebula carried out with the Spitzer Space Telescope using both Infrared Array Camera and Infrared Spectrograph, as part of a GTO program aimed to study stellar ejecta from evolved stars. Our observations reveal a rich mid-IR spectrum of the inner nebula showing both solid state and atomic gas signatures. Strong low-excitation atomic fine structure lines such as 26.0 µm [Fe II] and 34.8 µm [Si II], indicate, for the first time, the presence of a PDR in this object class. While the physics and chemistry of the low-excitation gas appears to be dominated by photodissociation, a possible contribution due to shocks can be inferred from the evidence of gas phase Fe abundance enhancement. The presence of amorphous silicates, inferred from the observed characteristic broad feature at 10 µm located in the inner nebula, suggests that dust has formed during the LBV outburst. This is in contrast with the detection of crystalline dust in other probably more evolved Galactic LBVs, which is similar to the crystalline dust observed in red supergiants. This has been considered to be evidence of dust production during evolutionary phases prior to the outburst.

Abstract Copyright:

Journal keyword(s): circumstellar matter - infrared: stars - stars: early-type - stars: individual: HR CAR - stars: winds, outflows

Status at CDS:  

Simbad objects: 7

goto Full paper

goto View the reference in ADS

Number of rows : 7

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 NAME Car Arm PoG 10 00 -60.0           ~ 377 1
2 V* AR Car V* 10 22 32 -63 58.8           ~ 1 0
3 HD 90177 s*b 10 22 53.8426931454 -59 37 28.361118869 9.16 9.66 8 8.15   LBV 302 0
4 NGC 3372 HII 10 44 19.0 -59 53 21           ~ 883 2
5 MR 35 s*b 11 08 40.0633818066 -60 42 51.718989987   12.33 10.20 11.66   LBV 113 0
6 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11450 0
7 [FMM95] 3 s*b 17 46 15.240 -28 50 03.58           LBV 139 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2009ApJ...694..697U and select 'bookmark this link' or equivalent in the popup menu


2020.06.02-04:53:17

© Université de Strasbourg/CNRS

    • Contact