J/A+A/470/231 JHKsIL' images of IRAS 06468-0325 (Yun+, 2007)
A diamond-ring star: the unusual morphology of a young (multiple?) object.
Yun J.L., Torrelles J.M., Santos N.C.
<Astron. Astrophys. 470, 231 (2007)>
=2007A&A...470..231Y 2007A&A...470..231Y
ADC_Keywords: Stars, double and multiple ; Photometry, infrared
Keywords: stars: formation - stars: pre-main sequence -
stars: binaries: general - stars: circumstellar matter -
stars: individual: IRAS 06468-0325 - ISM: reflection nebulae
Abstract:
Our new near-infrared J and Ks-band images taken towards
IRAS 06468-0325 revealed the presence of extended emission with very
unusual and enigmatic morphology: that of a diamond-ring, that is, a
ring or torus with a bright source overlaping the edge of it (not
inside it). We report the discovery of this source, explore its
nature, and propose possible interpretations of its morphological
structure. We observed IRAS 06468-0325 obtaining optical and infrared
images through IJHKs and L' filters, K-band low-resolution
spectroscopy, together with millimetre line observations of CO(1-0),
13CO(2-1), C18O(2-1), and CS(2-1).
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
06 49 22.8 -03 28 55 IRAS 06468-0325
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 97 2 Photometry of IRAS 06468-0325
J.fits 2880 234 Fits J-band image
H.fits 2880 235 Fits H-band image
K.fits 2880 234 Fits Ks-band image
I.fits 2880 53 Fits I-band image
L.fits 2880 994 Fits L'-band image
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 10 F4.1 s RAs Right ascension (J2000)
12 A1 --- DE- Declination sign (J2000)
13- 14 I2 deg DEd Declination (J2000)
16- 17 I2 arcmin DEm Declination (J2000)
19- 20 I2 arcsec DEs Declination (J2000)
22- 25 F4.1 mag Imag I-band magnitude
27- 32 A6 --- Iim Name of the FITS image
34- 37 F4.1 mag Jmag J-band magnitude
39- 44 A6 --- Jim Name of the FITS image
46- 49 F4.1 mag Hmag H-band magnitude
51- 56 A6 --- Him Name of the FITS image
58- 61 F4.1 mag Ksmag Ks-band magnitude
63- 68 A6 --- Ksim Name of the FITS image
70 A1 --- l_Lmag Limit flag on Lmag
71- 74 F4.1 mag Lmag L-band magnitude
76- 81 A6 --- Lim Name of the FITS image
83- 85 F3.1 mag J-H J-H colour index
87- 89 F3.1 mag H-Ks H-Ks colour index
91- 97 A7 --- Obs Object observed
--------------------------------------------------------------------------------
Acknowledgements:
Joao Yun, yun(at)iaa.es
(End) Patricia Vannier [CDS] 27-Apr-2007