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Article
Earth encounters as the origin of fresh surfaces on near-Earth asteroids
The 'ordinary chondrite problem' has been a factor in Solar System astronomy for three decades. It refers to the apparent anomaly that whereas about 80% of the meteorites falling to Earth are 'ordinary chondri...
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Article
Semi-annual oscillations in Saturn’s low-latitude stratospheric temperatures
Both Earth and Jupiter have equatorial oscillations in their atmospheres, with two-year and four-year periodicity respectively. Two groups working independently now report a related phenomenon on Saturn. Orton et...
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Chapter
Carbonaceous Onion-Like Particles: A Possible Component of the Interstellar Medium
A carbonaceous material formed from a hydrocarbon plasma called quenched carbonaceous composite (QCC) is shown to have functional groups that approximate the positions of the interstellar 217.5 nm absorption a...
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Chapter and Conference Paper
Near-Infrared AO Spectroscopy of Edge-On Protoplanetary Disks with Subaru IRCS
We carried out near infrared (1.4–4.2 μm) AO imaging and spectroscopy of two edge-on protoplanetary disks; HK TauB and HV TauC located in Taurus molecular cloud. We found a deep H2O Ice absorption (τ~ 1.1, 1.3) f...
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Chapter and Conference Paper
The Structure of the Young Stellar Outflows Revealed by High Angular Resolution [Fe II] λ 1.644 μ m Spectroscopy
We introduce results of the [Fe ii] λ1.644 μm spectroscopic observations toward the outflows emanating from L1551 IRS 5, DG Tau, HL Tau, and RW Aur. We resolved the region within ~±140 AU (< ±1′′) from their driv...
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Article
The Structure of Young Stellar Jets and Winds Revealed by High Resolution [Fe II] λ1.644μm Line Observations
We present high angular resolution spectra taken along the jets from L1551 IRS 5 and DG Tau obtained with the Subaru Telescope. The position-velocity diagrams of the [Fe II] λ 1.644 μmemission line revealed re...
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Chapter
Detection of Extended Water Vapor Atmosphere of Mira by Near-Infrared Spectroimagery
We present the first spectroimagery of extended molecular atmosphere of Mira spatially resolved by adaptive optics system. We found the molecular atmosphere of H2O, CO and CO2 is extended to about 40 mas. The pre...
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Chapter
The Structure of Young Stellar Jets and Winds Revealed By High Resolution [Fe Ii] λL.644μM Line Observations
We present high angular resolution spectra taken along the jets from L1551 IRS 5 and DG Tau obtained with the Subaru Telescope. The position-velocity diagrams of the [Fe II] λ 1.644 μm emission line revealed r...
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Chapter
Infrared Spectroscopy of Disks Around Young Stellar Objects
Accretion disks are considered to be central to the formation of stars and planetary systems. While the evidence for disks around young stars is compelling, it is largely indirect, and most disk properties are...
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Chapter
Infrared Techniques for Comet Observations
The infrared spectral region (1–1000 µm) is important for studies of both molecules and solid grains in comets. Infrared astronomy is in the midst of a technological revolution, with the development of sensitive ...
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Chapter and Conference Paper
Bright Near-Infrared Sources Within 1° of the Galactic Center
A near-infrared survey has been conducted of 0.55 square degrees around the Galactic center with the 1 m telescope of Siding Spring Observatory, Australia. From the detected sources, 39 objects which are brigh...
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Chapter
A Faint Object Spectrometer for the Infrared
A cryogenic astronomical spectrometer for the NASA Infrared Telescope Facility is described. This spectrometer will employ an array of at least 20 detectors and provide a resolving power of 100 to 1500 at 1–5 ...
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Article
A faint object spectrometer for the infrared
A cryogenic astronomical spectrometer for the NASA Infrared Telescope Facility is described. This spectrometer will employ an array of at least 20 detectors and provide a resolving power of 100 to 1500 at 1–5 ...
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Article
The 20-µm brightness temperature of the unilluminated side of Saturn's rings
The 20-µm brightness temperature of the unilluminated (north) side of Saturn's rings is reported here to be 56±1 K. This measurement, together with previous measurements of the rings at 20 µm, shows that the b...