An infrared quintuplet near the Galactic center

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168447· OSTI ID:6966128

Okuda, Haruyuki; Shibai, Hiroshi; Nakagawa, Takao; Matsuhara, Hideo; Kobayashi, Yukiyasu ^[1]

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1. Institute of Space and Astronautical Science, Sagamihara (Japan) Tokyo Univ. (Japan)

A compact cluster of five luminous infrared sources has been found in the vicinity of the Galactic center radio arc. All of the sources have large polarizations in the near-infrared and deep silicate absorptions at 10 microns. Strong absorption lines of CO are seen at 4.6 microns toward each source. The observed polarization and spectral features are likely to be interstellar in origin. The temperatures of the sources, based on infrared photometry and corrected for extinction, are in the range 600-900 K. None of the sources show either infrared recombination line emission from atomic hydrogen, lines of molecular hydrogen, or overtone band of CO at 2.3 microns. Because the objects are tightly clustered, all are likely to be very young objects; however, accurate classifications cannot be made at the present time. 31 refs.

• OSTI ID: 6966128
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 351; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ABSORPTION SPECTRA
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CLASSIFICATION
COSMIC RAY SOURCES
ELECTROMAGNETIC RADIATION
GALAXIES
GALAXY NUCLEI
INFRARED RADIATION
INTERSTELLAR SPACE
LUMINOSITY
MILKY WAY
NEBULAE
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHOTOMETRY
PHYSICAL PROPERTIES
POLARIZATION
RADIATIONS
RADIOWAVE RADIATION
SPACE
SPECTRA
SPECTROSCOPY