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The Asteroid-Comet Continuum [article]

David Jewitt, Henry H. Hsieh
2022 arXiv   pre-print
., Hsieh 2017) .  ...  From Hsieh et al. (2020). Fig. 12 12 Fig. 12.  ... 
arXiv:2203.01397v1 fatcat:5q73m5kfvfhtxfnfsybiuwhz7q

A frosty finding

Henry H. Hsieh
2010 Nature  
Henry H.  ...  Hsieh The asteroid belt is classically considered the domain of rocky bodies, being too close to the Sun for ice to survive.  ... 
doi:10.1038/4641286a pmid:20428155 fatcat:i6a5h236g5bathebqddre73hzy

Active Asteroids: Main-Belt Comets and Disrupted Asteroids [article]

Henry H. Hsieh
2015 arXiv   pre-print
While most active asteroids are found in the main asteroid belt, use of T J as the formal 2 Henry H.  ...  Hsieh 2014) .  ... 
arXiv:1511.01917v1 fatcat:ixv633ub7jfqrljtav5xwb2qre

Search for Activity in 3200 Phaethon

Henry H. Hsieh, David Jewitt
2005 Astrophysical Journal  
. , 2003 Lowry et al. 2003; Hsieh et al. 2004 ).  ...  Dust Trail Search The dust trail of 133P/(7968) Elst-Pizarro was seen oriented along the object's orbital plane (Hsieh et al. 2004) , although no measurable coma was observed.  ... 
doi:10.1086/429250 fatcat:5q2ej6bmkff27g4dnabrgwwfmy

Improved outcomes from endovascular aortic repair in younger patients: Towards improved risk stratification

Wan Chin Hsieh, Chung Dann Kan, Chong Chao Hsieh, Mohamed Omara, Brandon Michael Henry, Lazar B Davidovic
2019 Vascular  
to the research, authorship, and/or publication of this article Funding The author(s) received no financial support for the research, authorship, and/or publication of this article ORCID iD Wan Chin Hsieh  ... 
doi:10.1177/1708538119843420 pmid:31081493 pmcid:PMC6909194 fatcat:yzexveo4qnht5pjzhpoz6damda

Physical Observations of 2005 UD: A Mini-Phaethon

David Jewitt, Henry Hsieh
2006 Astronomical Journal  
It is tempting to speculate that (3200) Phaethon may be a dynamically and thermally evolved main-belt comet (Hsieh and Jewitt 2006) , although we currently lack the data to test this possibility.  ...  Still, the possibility is interesting and would be consistent with the expected thermal shock on a main-belt comet following a dramatic reduction in the perihelion distance from >3 AU (Hsieh and Jewitt  ... 
doi:10.1086/507483 fatcat:xap5gyxmlrerressigbwlc3k4i

U-Band Photometry of Kuiper Belt Objects

David Jewitt, Nuno Peixinho, Henry H. Hsieh
2007 Astronomical Journal  
We present U-band photometry of Kuiper Belt objects taken to further investigate their color-orbit systematics. As at longer optical and near-infrared wavelengths, the U-band colors of Kuiper Belt objects show a wide range and a unimodal distribution. We find no evidence that color systematics in the Kuiper Belt are strongly wavelengthdependent. This observation is consistent with control of the reflection characteristics by a single ( but unidentified) reddening material. No evidence is found
more » ... or blue/ultraviolet absorption that can arise from charge transfer transitions in hydrated minerals in some primitive (C-type) asteroids. In the classical KBOs alone the U À B and other color indices are most strongly correlated with the Tisserand parameter measured with respect to Neptune.
doi:10.1086/522787 fatcat:zacxgxt2ardihpi3nemf7g2whu

Polymerization of isoprene by n-butyl lithium

Henry Hsieh, Arthur V. Tobolsky
1957 Journal of Polymer Science  
Henry Hsien ArTHUR V.  ... 
doi:10.1002/pol.1957.1202510918 fatcat:zbuhcuxmkvatjjhhxbnlsb2fya

Potential Themis Family Asteroid Contribution to the Jupiter-Family Comet Population [article]

Henry H. Hsieh, Bojan Novakovic, Kevin J. Walsh, Norbert Schorghofer
2020 arXiv   pre-print
Hsieh et al. 2018) .  ...  At least three main-belt comets (MBCs, which exhibit comet-like activity indicative of sublimating ice, yet have asteroid-like orbits; Hsieh & Jewitt 2006) , namely 133P, 176P, and 288P, are members of  ... 
arXiv:2002.09008v1 fatcat:654asiw27bhzzlsx5sgyrztlle

Recurrent Activity from Active Asteroid (248370) 2005 QN173: A Main-Belt Comet [article]

Colin Orion Chandler, Chadwick A. Trujillo, Henry H. Hsieh
2021 arXiv   pre-print
The plot shows counts radially outward from the the object center at (0,0). cause (Hsieh et al. 2004 (Hsieh et al. , 2010)) .  ...  MBCs are often characterized by activity near perihelion and the absence of activity elsewhere in the orbit (Hsieh et al. 2015; Agarwal et al. 2017; Hsieh et al. 2018) , suggesting that the primary activity  ... 
arXiv:2111.06405v1 fatcat:dqktep2hdnb5fcffv43yxccf24

The Transient Jupiter Trojan-Like Orbit of P/2019 LD2 (ATLAS) [article]

Henry H. Hsieh, Alan Fitzsimmons, Bojan Novakovic, Larry Denneau, Aren N. Heinze
2020 arXiv   pre-print
Hsieh et al., 2019; Schwamb et al., 2019) .  ...  This dynamical evolutionary behavior is consistent with current short-period comets (Hsieh & Haghighipour, 2016) , and contrasts sharply with our six reference Trojans, all of which remain in effectively  ... 
arXiv:2007.13945v1 fatcat:jqpalngkarfa7oo62wb6fqb2jq

Disk-Integrated Thermal Properties of Ceres Measured at Millimeter Wavelengths [article]

Jian-Yang Li, Arielle Moullet, Timothy N. Titus, Henry H. Hsieh, Mark V. Sykes
2020 arXiv   pre-print
We observed Ceres at three epochs in 2015 November and 2017 September and October with ALMA 12-meter array and in 2017 October with the ALMA Compact Array (ACA), all at 265 GHz continuum (wavelengths of 1.1 mm) to map the temperatures of Ceres over a full rotation at each epoch. We also used 2017 October ACA observations to search for HCN. The disk-averaged brightness temperature of Ceres is measured to be between 170 K and 180 K during our 2017 observations. The rotational lightcurve of Ceres
more » ... hows a double peaked shape with an amplitude of about 4 upper limit production rate of 2×10^24 molecules s^-1, assuming globally uniform production and a Haser model. A thermophysical model suggests that Ceres's top layer has higher dielectric absorption than lunar-like materials at a wavelength of 1 mm. However, previous observations showed that the dielectric absorption of Ceres decreases towards longer wavelengths. Such distinct dielectric properties might be related to the hydrated phyllosilicate composition of Ceres and possibly abundant μm-sized grains on its surface. The thermal inertia of Ceres is constrained by our modeling as likely being between 40 and 160 tiu, much higher than previous measurements at infrared wavelengths. Modeling also suggests that Ceres's lightcurve is likely dominated by spatial variations in its physical or compositional properties that cause changes in Ceres's observed thermal properties and dielectric absorption as it rotates.
arXiv:2003.11045v1 fatcat:6af33widwrhfnkhakryw6jjgmu

Active asteroids: mystery in the Main Belt

Henry H. Hsieh, David Jewitt
2005 Proceedings of the International Astronomical Union  
Image from Hsieh et al. (2004) .  ...  Image from Hsieh et al. (2004) .  ... 
doi:10.1017/s1743921305006897 fatcat:e5bf2hvt5nbmxdhkyrtasb74zq

Orbital Alignment of Main-belt Comets

Yoonyoung Kim, Youngmin JeongAhn, Henry H. Hsieh
2018 Astronomical Journal  
is caused by other processes such as impacts or rotational destabilization (Jewitt et al. 2010; Hsieh et al. 2012) .  ...  Hsieh et al. 2018) , and object size can affect the rate of activity-triggering events and production of observable activity.  ... 
doi:10.3847/1538-3881/aaad01 fatcat:6r4hahucjzbrfh63v3fjsioaoq

Active Asteroids: Main-Belt Comets and Disrupted Asteroids

Henry H. Hsieh
2015 Proceedings of the International Astronomical Union  
Hsieh 2014) .  ...  Hsieh 2009) .  ... 
doi:10.1017/s1743921316002969 fatcat:stoyvoxlhreozlwaosgzdblgbe
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