The following document lists the file abstract/TMAIHARA_MG0414.abs
from catalogue VI/111.
A plain copy of the file
(without headers/trailers) may be downloaded.
MG0414+0534 is a gravitational lens object, which has been observed in radio, optical and near infrared bands, with very intriguing natures such as an extremely red color from the optical to near infrared bands, no emission line, and the high brightness level. However, properties of both the lensed source and the lensing galaxy have been utterly unknown. Incidentally, we have made spectroscopic observations of this object in the J- and H-bands. Although the spectrum does not have any emission and absorption features, the obtained wide spanning spectral energy distribution (SED) is very interesting in that the Balmer discontinuity appears to be there between 1 and 1.2 microns. This is naturally explained by assuming that the object is a post-starburst galaxy whose redshift is around 2 which suffers from a heavy reddenning by dust either in the source or in the lensing galaxy. This interpretation is likely to be consistent with our proposal that the only one absorption feature so far claimed may be due to MgII at 2800A. In this consideration, because the lensed source is very luminous, a strong dust emission is expected in far infrared bands originating in the dust in the post starburst galaxy. Our goal in this proposal is to obtain the wide range SED, and to confirm that the source is a highly luminous post starburst galaxy containing enormous amount of dust. Recently, it has been reported that even high redshift objects may have a considerable amount of dust. It is very important to clarity the production rate of dust in the newly formed galaxies at the early epoch of the universe. This object happens to be gravitationally lensed, which makes a far infrared observation much easier because of the large light amplification. So, a first study of "high redshift dusty object" may be made by ISO.