Characterization of the Nucleus, Morphology, and Activity of Interstellar Comet 2I/Borisov by Optical and Near-infrared GROWTH, Apache Point, IRTF, ZTF, and Keck Observations

@article{Bolin2020CharacterizationOT,
  title={Characterization of the Nucleus, Morphology, and Activity of Interstellar Comet 2I/Borisov by Optical and Near-infrared GROWTH, Apache Point, IRTF, ZTF, and Keck Observations},
  author={Bryce T. Bolin and Carey M. Lisse and Mansi M. Kasliwal and Robert M. Quimby and Hanjie Tan and C. M. Copperwheat and Zhong-Yi Lin and Alessandro Morbidelli and Lyu Abe and Philippe P. Bendjoya and James M. Bauer and Kevin B Burdge and Michael W. Coughlin and Christoffer U. Fremling and Ryosuke Itoh and Michael Koss and Frank J. Masci and Syota Maeno and Eric E. Mamajek and Federico Marocco and Katsuhiro L. Murata and Jean-Pierre Rivet and Michael L. Sitko and Daniel Stern and David Vernet and R. Walters and Lin Yan and Igor Andreoni and Varun Bhalerao and Dennis Bodewits and Kishalay De and Kunal P. Deshmukh and Eric C. Bellm and Nadejda Blagorodnova and Derek L. Buzasi and S. Bradley Cenko and Chan-Kao Chang and Drew Chojnowski and Richard Dekany and D. Duev and Matthew J. Graham and Mario Juri{\'c} and Emily Kramer and Shrinivas R. Kulkarni and Thomas Kupfer and Ashish A. Mahabal and James D. Neill and Chow-Choong Ngeow and Bryan Edward Penprase and Reed L. Riddle and Hector Rodriguez and Philippe Rosnet and Roger M. Smith and Jesper Sollerman and Maayane T. Soumagnac},
  journal={The Astronomical Journal},
  year={2020}
}
We present visible and near-infrared photometric and spectroscopic observations of interstellar object 2I/Borisov taken from 2019 September 10 to 2019 November 29 using the GROWTH, the APO ARC 3.5 m and the NASA/IRTF 3.0 m combined with post and pre-discovery observations of 2I obtained by ZTF from 2019 March 17 to 2019 May 5. Comparison with imaging of distant Solar System comets shows an object very similar to mildly active Solar System comets with an out-gassing rate of $\sim$10$^{27}$ mol… 

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References

SHOWING 1-10 OF 116 REFERENCES
Detection of CN Gas in Interstellar Object 2I/Borisov
The detection of Interstellar Objects passing through the Solar System offers the promise of constraining the physical and chemical processes involved in planetary formation in other extrasolar
Central Bureau Electronic Telegrams
  • 2019
Initial Characterization of Interstellar Comet 2I/2019 Q4 (Borisov)
We present initial observations of the interstellar body 2I/(2019 Q4) Borisov taken to determine its nature prior to the perihelion in 2019 December. Images from the Nordic Optical Telescope show a
An Observational Upper Limit on the Interstellar Number Density of Asteroids and Comets
We derived 90% confidence limits (CL) on the interstellar number density ($\rho_{IS}^{CL}$) of interstellar objects (ISO; comets and asteroids) as a function of the slope of their size-frequency
Carbon Chain Depletion of 2I/Borisov
The composition of comets in the solar system come in multiple groups thought to encode information about their formation in different regions o fthe outer protosolar disk. The recent discovery of
A brief visit from a red and extremely elongated interstellar asteroid
TLDR
Observations and analysis of the object 1I/2017 U1 (‘Oumuamua) that demonstrate its extrasolar trajectory, and that enable comparisons to be made between material from another planetary system and from the authors' own, reveal it to be asteroidal with no hint of cometary activity despite an approach within 0.25 astronomical units of the Sun.
Using Cometary Activity to Trace the Physical and Chemical Evolution of Cometary Nuclei
Historically, minor bodies are classified as comets based on observations of “activity,” which refers to the appearance of dust and gas around the nucleus. While cometary activity has been observed
Coma Anisotropy and the Rotation Pole of Interstellar Comet 2I/Borisov
Hubble Space Telescope observations of interstellar comet 2I/Borisov near perihelion show the ejection of large (>~100 um) particles at <~9 m/s speeds, with estimated mass-loss rates of ~35 kg/s. The
Detection of a Water Tracer in Interstellar Comet 2I/Borisov
We present high spectral resolution optical spectra obtained with the ARCES instrument at Apache Point Observatory showing detection of the [OI]6300 A line in interstellar comet 2I/Borisov. We employ
The Nucleus of Interstellar Comet 2I/Borisov
We present high resolution imaging observations of interstellar comet 2I/Borisov (formerly C/2019 Q4) obtained using the Hubble Space Telescope. Scattering from the comet is dominated by a coma of
...
1
2
3
4
5
...