2017ApJ...847...77H

Query : 2017ApJ...847...77H

2017ApJ...847...77H - Astrophys. J., 847, 77-77 (2017/September-3)

Relativistic gas drag on dust grains and implications.

HOANG T.

Abstract (from CDS):

We study the drag force on grains moving at relativistic velocities through interstellar gas and explore its application. First, we derive a new analytical formula of the drag force at high energies and find that it is significantly reduced compared to the classical model. Second, we apply the obtained drag force to calculate the terminal velocities of interstellar grains by strong radiation sources such as supernovae and active galactic nuclei (AGNs). We find that grains can be accelerated to relativistic velocities by very luminous AGNs. We then quantify the deceleration of relativistic spacecraft proposed by the Breakthrough Starshot initiative due to gas drag on a relativistic lightsail. We find that the spacecraft's decrease in speed is negligible because of the suppression of gas drag at relativistic velocities, suggesting that the lightsail may be open for communication during its journey to α Centauri without causing a considerable delay. Finally, we show that the damage to relativistic thin lightsails by interstellar dust is a minor effect.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): dust, extinction - relativistic processes - space vehicles - space vehicles: instruments - space vehicles: instruments

Simbad objects: 1

goto Full paper

goto View the references in ADS

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 * alf Cen ** 14 39 36.50 -60 50 02.3   0.4 -0.1     G2V+K1V 1031 0

Query : 2017ApJ...847...77H

Basic data :
* alf Cen -- Double or Multiple Star
Other object types: otypes_help 		* (2012ApJ,*,...), X (1E,2E,...), ** (CCDM,**,...), UV (2EUVE,EUVE,...), PM* (Ci,PM), IR (IRAS)
ICRS coord. (ep=J2000) : 		14 39 36.50 -60 50 02.3 (Optical) [ ] D 2001AJ....122.3466M
FK4 coord. (ep=B1950 eq=1950) : 		14 36 11.50 -60 37 43.1 [ ]
Gal coord. (ep=J2000) : 		315.73419 -00.67964 [ ]
Proper motions mas/yr : 		-3608 686 [30 25 179] C ~
Radial velocity / Redshift / cz : 		V(km/s) -22.3 [0.9] / z(~) -0.000074 [0.000003] / cz -22.30 [0.90]
   A 1979IAUS...30...57E
Parallaxes (mas): 		750.81 [0.38] B 2021AJ....162...14A
Spectral type: 		G2V+K1V C 2006A&A...460..695T
Fluxes (2) :
B 0.4 [~] E ~
V -0.1 [~] E ~
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 2 		Display criteria :

Identifiers (34) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

CCDM J14396-6050AB 1E 143555-6037.6 GES J14392972-6049560 RX J1439.5-6050
* alf Cen 2E 3308 IDS 14328-6025 AB 1RXS J143940.4-605020
** RHD 1 2E 1435.9-6037 IRAS 14359-6037 SAO 252838
** LDS 494AB 1ES 1435-60.6 LPM 534 uvby98 100128620
CD-60 5293 2EUVE J1439-60.8 PM 14362-6038 WDS J14396-6050AB
Ci 20 875 EUVE J1439-60.8 2RE J143941-605000 2XMM J143933.0-605008
CPD-60 5483 FK5 538 2RE J1439-605 [TSA98] J143948.42-605021.66
CSI-60 5483 43 GC 19728 RE J1439-605
1E 143556-6037.3 GCRV 8519 RE J143944-605008

References (1031 between 1850 and 2026) (Total 1031)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Collections of Measurements Description of Measurements

Velocities : 3    Fe/H : 1    Plx : 1    PM : 2   

   

Observing logs
ISO : 5    XMM : 7   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : * alf Cen

Link by name to the catalogue in VizieR :

CCDM J14396-6050AB CD-60 5293 CPD-60 5483 2E 3308 EUVE J1439-60.8
FK5 538 IRAS 14359-6037 2RE J143941-605000 2RE J1439-605 1RXS J143940.4-605020
SAO 252838 uvby98 100128620 WDS J14396-6050AB

Search by coordinates in Vizier (radius: 20 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2017ApJ...847...77H and select 'bookmark this link' or equivalent in the popup menu