Exocomets from a Solar System Perspective

被引：19

作者：

Strom, Paul A. ^{[1
]}

Bodewits, Dennis ^{[2
]}

Knight, Matthew M. ^{[3
,4
]}

Kiefer, Flavien ^{[5
]}

Jones, Geraint H. ^{[6
,7
]}

Kral, Quentin ^{[8
]}

Matra, Luca ^{[9
]}

Bodman, Eva ^{[10
]}

Capria, Maria Teresa ^{[11
]}

Cleeves, Ilsedore ^{[12
]}

Fitzsimmons, Alan ^{[13
]}

Haghighipour, Nader ^{[14
]}

Harrison, John H. D. ^{[15
]}

Iglesias, Daniela ^{[16
,17
]}

Kama, Mihkel ^{[18
,19
]}

Linnartz, Harold ^{[20
]}

Majumdar, Liton ^{[21
]}

de Mooij, Ernst J. W. ^{[13
]}

Milam, Stefanie N. ^{[22
]}

Opitom, Cyrielle ^{[23
,24
]}

Rebollido, Isabel ^{[25
]}

Rogers, Laura K. ^{[15
]}

Snodgrass, Colin ^{[24
]}

Sousa-Silva, Clara ^{[26
]}

Xu, Siyi ^{[27
]}

Lin, Zhong-Yi ^{[28
]}

Zieba, Sebastian ^{[29
,30
]}

机构：

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[2] Auburn Univ, Dept Phys, Leach Sci Ctr, Auburn, AL 36832 USA

[3] US Naval Acad, Dept Phys, 572C Holloway Rd, Annapolis, MD 21402 USA

[4] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[5] Sorbonne Univ, Inst Astrophys Paris, CNRS, UMR 7095, 98 Bis Bd Arago, F-75014 Paris, France

[6] Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England

[7] UCL Birkbeck, Ctr Planetary Sci, London, England

[8] Univ Paris, Sorbonne Univ, Univ PSL, LESIA,Observ Paris,CNRS, 5 Pl Jules Janssen, F-92195 Meudon, France

[9] Natl Univ Ireland Galway, Sch Phys, Univ Rd, Galway, Ireland

[10] Arizona State Univ, Sch Earth & Space Explorat, POB 871404, Tempe, AZ 85287 USA

[11] INAF, Ist Astrofis & Planetol Spaziali IAPS, Via Fosso Cavaliere, I-00133 Rome, Italy

[12] Univ Virginia, Charlottesville, VA 22904 USA

[13] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast, Antrim, North Ireland

[14] Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96825 USA

[15] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[16] Univ Valparaiso, Fac Ciencias, Inst Fis & Astron, Av Gran Bretana 1111, Valparaiso 5030, Chile

[17] Univ Valparaiso, Fac Ciencias, Nucleo Milenio Formac Planetaria NPF, Av Gran Bretana 1111, Valparaiso 5030, Chile

[18] Tartu Observ, Observatooriumi 1, EE-61602 Toravere, Tartumaa, Estonia

[19] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[20] Leiden Observ, Lab Astrophys, POB 9513, NL-2300 RA Leiden, Netherlands

[21] HBNI, Natl Inst Sci Educ & Res, Sch Earth & Planetary Sci, Jatni 752050, Odisha, India

[22] NASA, Goddard Space Flight Ctr, Astrochem Lab, Code 691, Greenbelt, MD 20771 USA

[23] ESO European Southern Observ, Alonso Cordova 3107, Santiago, Chile

[24] Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland

[25] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain

[26] MIT, Earth Atmospher & Planetary Sci Dept, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[27] Gemini Observ, NSFs NOIRLab, 670 Nohoku Pl, Hilo, HI 96720 USA

[28] Natl Cent Univ, Inst Astron, Chungli 32054, Taiwan

[29] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[30] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2020年 / 132卷 / 1016期

基金：

英国科学技术设施理事会;

关键词：

Comets; Kuiper belt; Main-belt comets; Photometry; Small solar system bodies; Spectroscopy; PICTORIS CIRCUMSTELLAR DISK; COMET HALE-BOPP; MEAN-MOTION RESONANCES; HST-GHRS OBSERVATIONS; BETA-PICTORIS; DEBRIS DISKS; WHITE-DWARFS; WATER ICE; X-RAY; ABSORPTION VARIABILITY;

D O I：

10.1088/1538-3873/aba6a0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Exocomets are small bodies releasing gas and dust which orbit stars other than the Sun. Their existence was first inferred from the detection of variable absorption features in stellar spectra in the late 1980s using spectroscopy. More recently, they have been detected through photometric transits from space, and through far-IR/mm gas emission within debris disks. As (exo)comets are considered to contain the most pristine material accessible in stellar systems, they hold the potential to give us information about early stage formation and evolution conditions of extra solar systems. In the solar system, comets carry the physical and chemical memory of the protoplanetary disk environment where they formed, providing relevant information on processes in the primordial solar nebula. The aim of this paper is to compare essential compositional properties between solar system comets and exocomets to allow for the development of new observational methods and techniques. The paper aims to highlight commonalities and to discuss differences which may aid the communication between the involved research communities and perhaps also avoid misconceptions. The compositional properties of solar system comets and exocomets are summarized before providing an observational comparison between them. Exocomets likely vary in their composition depending on their formation environment like solar system comets do, and since exocomets are not resolved spatially, they pose a challenge when comparing them to high fidelity observations of solar system comets. Observations of gas around main sequence stars, spectroscopic observations of "polluted" white dwarf atmospheres and spectroscopic observations of transiting exocomets suggest that exocomets may show compositional similarities with solar system comets. The recent interstellar visitor 2I/Borisov showed gas, dust and nuclear properties similar to that of solar system comets. This raises the tantalising prospect that observations of interstellar comets may help bridge the fields of exocomet and solar system comets.

引用

页码：1 / 19

页数：19

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