2019MNRAS.484L..75V

Query : 2019MNRAS.484L..75V

2019MNRAS.484L..75V - Mon. Not. R. Astron. Soc., 484, L75-L78 (2019/March-3)

Dust bombardment can explain the extremely elongated shape of 1I/'Oumuamua and the lack of interstellar objects.

VAVILOV D.E. and MEDVEDEV Y.D.

Abstract (from CDS):

Asteroid 1I/'Oumuamua is the first observed interstellar object. Its light-curve amplitude indicates that the object is highly elongated with an axial ratio of at least 5:1. The absence of such elongated asteroids in the Solar system and the apparent lack of observed interstellar objects are intriguing problems. Here we show that 'Oumuamua may have originated as a slightly elongated asteroid about 500 x 300 m in size. Surface erosion, caused by interstellar dust bombardment, subsequently increased the axial ratio. Simply travelling through the interstellar medium for 0.03 to 2 Gyr would have sufficed to give 1I its present shape. Passing through a 10 pc dust cloud with a grain density of 10–23 g cm–3 at 50 km s–1 would have had a similar effect on 'Oumuamua's form. Smaller objects of around 100 m in diameter can travel the Galactic disc for merely 30 Myr before they are disrupted. This could explain the small number of interstellar objects observed to date.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): comets: general - minor planets, asteroids: general - minor planets, asteroids: individual: 1I/2017 U1 ('Oumuamua) - (ISM:) dust, extinction

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 8 OpC 18 03 37 -24 23.2           ~ 644 1

Query : 2019MNRAS.484L..75V

Basic data :
M 8 -- Open Cluster
Other object types: otypes_help 		Rad (CTB,GRS,...), HII (1976A&AS,LBN,...), OpC (OCISM), Cl* (Villafranca)
ICRS coord. (ep=J2000) : 		18 03 37.0 -24 23 12 [ ] E ~
FK4 coord. (ep=B1950 eq=1950) : 		18 00 32.9 -24 23 21 [ ]
Gal coord. (ep=J2000) : 		005.9575 -01.1667 [ ]
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1242 		Display criteria :

Identifiers (20) :
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M 8 LBN 006.06-01.23 NAME Lagoon SH 2-25
CTB 46 LBN 25 NAME Lagoon Nebula Villafranca O-018
GRS G006.00 -01.20 LMH 11 NRL 11 W 29
GRS G006.20 -01.20 MM 10 OCISM 1 [KC97c] G006.0-01.2
Kes 58 Mol 37 PMN J1803-2422 [L89b] 5.973-01.178

References (644 between 1850 and 2026) (Total 644)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Distance : 1   

   

Observing logs
IUE : 31   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : M 8

Link by name to the catalogue in VizieR :

PMN J1803-2422

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