First Detection of an Optical Dust Trail along the Orbit of 22P/Kopff

Ishiguro, Masateru; Watanabe, J.; Usui, Fumihiko; Tanigawa, T.; Kinoshita, Daisuke; Suzuki, J.; Nakamura, Ryosuke; Ueno, Munetaka; Mukai, T.

doi:10.1086/341598

Cited by 49 publications

(30 citation statements)

References 20 publications

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“…This implies that meteoroid's temperature is closer to the blackbody temperature than the temperature of sub-micron organic particles and that the size of meteoroids is likely larger than infrared wavelengths. Observations of cometary dust trails reveal that trail particles have small β-values of 10 −5 to 10 −3 , β being the ratio of solar radiation pressure to solar gravity (Ishiguro et al 2002(Ishiguro et al , 2003. This small β-values for trail particles are consistent with those values inferred for Leonid meteoroids (Trigo-Rodrìguez et al 2002, 2004b.…”

Section: Discussionsupporting

confidence: 80%

Thermal desorption of Na in meteoroids

Kasuga¹,

Yamamoto

Kimura

et al. 2006

A&A

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Context. The observed sodium abundance of meteoroids in meteor showers might differ from the original abundance because of processing in interplanetary space after ejections from their parent bodies. Among various processes, thermal alteration of alkali silicate is most likely the major process of Na depletion. Aims. We clarify at which perihelion distances the thermal desorption alters the Na content of meteoroids that are observed as meteor showers. Methods. We compile Na abundances of meteoroids in meteor showers at each perihelion distance and compare them to the sublimation temperatures of alkali silicates. Results. Na abundances of meteoroids do not depend on their perihelion distances at 0.14 ≤ q ≤ 0.99 AU. No Na depletion in these distances constrains the temperature of meteoroids at q = 0.14 AU to be lower than the sublimation temperature of alkali silicates ∼900 K. Conclusions. Meteoroid particles are characterized as large, compact, blackbody-like particles. On orbit with perihelion distances q < 0.1 AU, meteoroids would show evidence of thermal desorption of metals, in particular, Na.

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Section: Discussionsupporting

confidence: 80%

Thermal desorption of Na in meteoroids

Kasuga¹,

Yamamoto

Kimura

et al. 2006

A&A

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“…It also permits a direct comparison with the previous study of the 17P/Holmes dust mass-loss rate given in Stevenson & Jewitt (2012). However, the existence of large particles as well as micrometer-sized particles is widely confirmed based on telescopic observations (Watanabe et al 1990;Ishiguro et al 2002;Sykes & Walker 1992;Fulle 2004;Reach et al 2007), remote-sensing observations with spacecraft onboard cameras (Sekanina et al 2004), and in situ measurements of cometary dust particles (McDonnell et al 1986;Tuzzolino et al 2003;A'Hearn et al 2011). The detection of a cometary dust trail associated with 17P/Holmes with Spitzer is definitive evidence that 17P/Holmes had ejected large dust particles (Reach et al 2010).…”

Section: Dust Tail Morphologymentioning

confidence: 87%

Comet 17p/Holmes: Contrast in Activity Between Before and After the 2007 Outburst

Ishiguro¹,

Kim²,

Kim³

et al. 2013

ApJ

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A Jupiter-family comet, 17P/Holmes, underwent outbursts in 1892 and 2007. In particular, the 2007 outburst is known as the greatest outburst over the past century. However, little is known about the activity before the outburst because it was unpredicted. In addition, the time evolution of the nuclear physical status has not been systematically studied. Here we study the activity of 17P/Holmes before and after the 2007 outburst through optical and mid-infrared observations. We found that the nucleus highly depleted its near-surface icy component before but became activated after the -3 -2007 outburst. Assuming a conventional 1-µm-sized grain model, we derived a surface fractional active area of 0.58% ± 0.14% before the outburst whereas it was enlarged by a factor of ∼50 after the 2007 outburst. We also found that large (≥1 mm) particles could be dominant in the dust tail observed around aphelion. Based on the size of the particles, the dust production rate was 170 kg s −1 at the heliocentric distance r h = 4.1 AU, suggesting that the nucleus still held active status around the aphelion passage. The nucleus color was similar to that of the dust particles and average for a Jupiter-family comet but different from most Kuiper Belt objects, implying that the color may be inherent to icy bodies in the solar system. On the basis of these results, we concluded that more than 76 m surface materials were blown off by the 2007 outburst.

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“…Owing to the limited observation period and coverage by IRAS, it is controversial whether dust trails can be observed for comets that were not detected by IRAS (Sykes & Walker 1992). Ground-based observations have recently opened a new window on dust trails; we succeeded in detecting the dust trail of 22P/Kopff in groundbased observations using the Kiso Observatory Schmidt telescope (Ishiguro et al 2002). Using the same instruments, we have made a survey of dust trails other than the eight trails already detected by IRAS.…”

Section: Introductionmentioning

confidence: 99%

Discovery of the Dust Trail of the Stardust Comet Sample Return Mission Target: 81P/Wild 2

Ishiguro

Kwon

Sarugaku

et al. 2003

ApJ

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We have succeeded in detecting a dust trail along the orbit of the short-period comet 81P/Wild 2, the target of the Stardust mission, which will fly by 81P/Wild 2 in 2004 January. This is the first discovery in optical wavelengths for which an IR counterpart (such as from IRAS) has not been reported. The detected trail extends from the nucleus to a point 2Њ .3 (0.14 AU) back along the orbit. Its width is 9Љ ( km) near the nucleus. Based on a comparison 4

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First Detection of an Optical Dust Trail along the Orbit of 22P/Kopff

Cited by 49 publications

References 20 publications

Thermal desorption of Na in meteoroids

Thermal desorption of Na in meteoroids

Comet 17p/Holmes: Contrast in Activity Between Before and After the 2007 Outburst

Discovery of the Dust Trail of the Stardust Comet Sample Return Mission Target: 81P/Wild 2

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