The Nucleus of Comet Hale-Bopp (C/1995 O1): Size and Activity
@article{Fernndez2000TheNO, title={The Nucleus of Comet Hale-Bopp (C/1995 O1): Size and Activity}, author={Yan R. Fern{\'a}ndez}, journal={Earth, Moon, and Planets}, year={2000}, volume={89}, pages={3-25} }
A review of our current understanding of Comet Hale-Bopp’s nuclear size is presented. Currently the best constraints on the effective radiusare derived from late-1996 mid-IR data and near-perihelion radio data.Unfortunately the two regimes give differing answers for the radius. A possible reconciliation of the two datasets is presented that would place the radius at around 30 km. This is a large cometary radius compared to the others that are known, and this motivates a discussion of what makes…
27 Citations
A dynamical analysis of the dust tail of Comet C/1995 O1 (Hale–Bopp) at high heliocentric distances
- Physics
- 2014
Some Features of Comet Hale–Bopp (According to the Observations of 1995–1998)
- Physics
- 2020
Abstract “The Great Comet of 1997” was a significant event in cometary physics. Numerous interesting scientific studies are devoted to this comet. Unfortunately, in the Russian scientific literature,…
Comet Hale-Bopp in outburst: Imaging the dynamics of icy particles with HST/NICMOS ✩
- Physics, Geology
- 2007
Observational Constraints On Surface Characteristics Of Comet Nuclei
- Physics, Geology
- 2000
Direct observations of the nuclear surfaces of comets have been difficult; however a growing number of studies are overcoming observational challenges and yielding new information on cometary…
Cometary Activity at 25.7 AU: Hale-Bopp 11 Years after Perihelion*
- Geology, Physics
- 2008
Eleven years after its perihelion, comet C/1995 O1 (Hale-Bopp) is still active. Between 2007 October 20 and 22, we detected a diffuse coma of 180 × 103 km in diameter with a slight elongation toward…
First attempt at interpreting millimetric observations of CO in comet C/1995 O1 (Hale-Bopp) using 3D+t hydrodynamical coma simulations
- Physics
- 2010
Context. Millimetre line observations of comet C/1995 O1 (Hale-Bopp) close to perihelion, completed using the IRAM Plateau de Bure Interferometer, have detected temporal variations in the CO J(2-1)…
CO and Other Volatiles in Distantly Active Comets
- Physics, Geology
- 2017
The activity of most comets near the Sun is dominated by the sublimation of frozen water, the most abundant ice in comets. Some comets, however, are active well beyond the water-ice sublimation limit…
Thermophysical simulations of comet Hale-Bopp
- Physics
- 2014
Aims. In this work, we simulate the global behavior of comet Hale-Bopp with our thermophysical model starting with simple, homogeneous conditions, so that dust mantling and the active area develop…
Masses of long-period comets derived from non-gravitational effects – analysis of the computed results and the consistency and reliability of the non-gravitational parameters
- Physics, Geology
- 2011
We estimate masses for a selected sample of long-period comets (LPCs) (with orbital periods P > 1000 yr and perihelion distances q < 2 au), with good photometric visual light curves and known…
References
SHOWING 1-10 OF 82 REFERENCES
The Activity and Size of the Nucleus of Comet Hale-Bopp (C/1995 O1)
- Physics, GeologyScience
- 1997
Analysis of Hubble Space Telescope (HST) images of comet Hale-Bopp (C/1995 O1) suggests that the effective diameter of the nucleus is between 27 to 42 kilometers, which is at least three times larger…
The Inner Coma and Nucleus of Comet Hale–Bopp: Results from a Stellar Occultation
- Physics, Geology
- 1999
Abstract We discuss the properties of the nucleus and inner coma of Comet Hale–Bopp (C/1995 O1) as derived from observations of its occultation of Star PPM 200723 on 5 October 1996, while the comet…
Photometric Behavior of Comet Hale-Bopp (C/1995 O1) Before Perihelion
- Physics, GeologyScience
- 1997
Narrowband photometric observations of comet Hale-Bopp (C/1995 O1) between 25 July 1995 and 15 February 1997 indicated gas and dust production rates of 20 and 100 times greater, respectively, than…
A Determination of The Nuclear Size of Comet Hale–Bopp (C/1995 O1)
- Physics
- 1997
The signal of the nucleus was digitally extracted from six images of the innermost coma of this comet, obtained with the Hubble Space Telescope’s Wide-Field Planetary Camera 2 in the planetary mode…
Dust Morphology Of Comet Hale-Bopp (C/1995 O1): I. Pre-Perihelion Coma Structures In
- Physics
- 1997
In 1996 comet Hale-Bopp exhibited a porcupine-like coma with straight jets of dust emission from several active regions on the nucleus. The multi-jet coma geometry developed during the first half of…
Dust Morphology Of Comet Hale-Bopp (C/1995 O1). Ii. Introduction Of A Working Model
- Physics
- 1997
A Monte Carlo image simulation code for dust features in comets is applied to comet Hale-Bopp in order to model the object's persistent porcupine-like appearance on high-resolution images taken…
Estimating the Size of Hale-Bopp's Nucleus
- Physics, Geology
- 1997
A variety of independent methods have been used to estimate the size of the nucleus of comet Hale-Bopp. Several groups have analyzed optical and infrared images of the comet and claim to detect the…
Dust Activity in Comet Hale-Bopp
- Physics, Geology
- 1997
Comet Hale-Bopp has shown an extremely elevated level of dust activity during its apparition. We examine the dust activity of the comet, particularly the dust jets which were observed so frequently…
Infrared Observations Of Dust Emission From Comet Hale-Bopp
- Physics, Geology
- 1997
We present infrared imaging and photometry of the bright, giant comet C/1995 O1 (Hale-Bopp). The comet was observed in an extended infrared and optical observing campaign in 1996–1997. The infrared…
The Spectrum of Comet Hale-Bopp (C/1995 O1) Observed with the Infrared Space Observatory at 2.9 Astronomical Units from the Sun
- PhysicsScience
- 1997
Several broad emission features observed in the 7- to 45-micrometer region suggest the presence of silicates, particularly magnesium-rich crystalline olivine, similar to those observed inThe dust envelopes of Vega-type stars.