Siblings for SETI

David Frisch, Fulvio Melia

Research output: Contribution to journalArticle

Abstract

We on Earth and intelligent beings elsewhere in our galaxy can single out each other as special targets for communication if our stars have common properties, and can thus perhaps be stimulated to broadcast and listen directionally to try to give the coincidence between sending and listening that is necessary. The SAO Catalogue of roughly 260,000 stars was culled for such "sibling" candidates using their spectra, location, and motion. Only a few of the roughly 50,000 tabulated G-stars proved interesting, in part because the information about almost all of them is imprecise, and in part perhaps because our criteria were overselective. However, a set of mostly untabulated sibling candidate stars can be defined, given a direction and small solid angle that are mutually interesting to members of that set, so that overlapping broadcast/receiving cones can be selected on the basis of this commonality. We believe that the double cone about the direction to the galactic center, with half angle α = e2/ h {combining short stroke overlay}c = 1 137 radian, is an almost inevitable choice. With current technology, sending as well as receiving within this small solid angle can reach to about 1 kpsc, making available an estimated 103 G-star sibling candidates.

Original languageEnglish (US)
Pages (from-to)432-438
Number of pages7
JournalIcarus
Volume55
Issue number3
DOIs
StatePublished - 1983
Externally publishedYes

Fingerprint

Project SETI
G stars
stars
cones
commonality
common property resource
strokes
catalogs
communication
galaxies

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Siblings for SETI. / Frisch, David; Melia, Fulvio.

In: Icarus, Vol. 55, No. 3, 1983, p. 432-438.

Research output: Contribution to journalArticle

Frisch, David ; Melia, Fulvio. / Siblings for SETI. In: Icarus. 1983 ; Vol. 55, No. 3. pp. 432-438.
@article{85010da398b64aeca3233284b1aa0b65,
title = "Siblings for SETI",
abstract = "We on Earth and intelligent beings elsewhere in our galaxy can single out each other as special targets for communication if our stars have common properties, and can thus perhaps be stimulated to broadcast and listen directionally to try to give the coincidence between sending and listening that is necessary. The SAO Catalogue of roughly 260,000 stars was culled for such {"}sibling{"} candidates using their spectra, location, and motion. Only a few of the roughly 50,000 tabulated G-stars proved interesting, in part because the information about almost all of them is imprecise, and in part perhaps because our criteria were overselective. However, a set of mostly untabulated sibling candidate stars can be defined, given a direction and small solid angle that are mutually interesting to members of that set, so that overlapping broadcast/receiving cones can be selected on the basis of this commonality. We believe that the double cone about the direction to the galactic center, with half angle α = e2/ h {combining short stroke overlay}c = 1 137 radian, is an almost inevitable choice. With current technology, sending as well as receiving within this small solid angle can reach to about 1 kpsc, making available an estimated 103 G-star sibling candidates.",
author = "David Frisch and Fulvio Melia",
year = "1983",
doi = "10.1016/0019-1035(83)90113-6",
language = "English (US)",
volume = "55",
pages = "432--438",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",
number = "3",

}

TY - JOUR

T1 - Siblings for SETI

AU - Frisch, David

AU - Melia, Fulvio

PY - 1983

Y1 - 1983

N2 - We on Earth and intelligent beings elsewhere in our galaxy can single out each other as special targets for communication if our stars have common properties, and can thus perhaps be stimulated to broadcast and listen directionally to try to give the coincidence between sending and listening that is necessary. The SAO Catalogue of roughly 260,000 stars was culled for such "sibling" candidates using their spectra, location, and motion. Only a few of the roughly 50,000 tabulated G-stars proved interesting, in part because the information about almost all of them is imprecise, and in part perhaps because our criteria were overselective. However, a set of mostly untabulated sibling candidate stars can be defined, given a direction and small solid angle that are mutually interesting to members of that set, so that overlapping broadcast/receiving cones can be selected on the basis of this commonality. We believe that the double cone about the direction to the galactic center, with half angle α = e2/ h {combining short stroke overlay}c = 1 137 radian, is an almost inevitable choice. With current technology, sending as well as receiving within this small solid angle can reach to about 1 kpsc, making available an estimated 103 G-star sibling candidates.

AB - We on Earth and intelligent beings elsewhere in our galaxy can single out each other as special targets for communication if our stars have common properties, and can thus perhaps be stimulated to broadcast and listen directionally to try to give the coincidence between sending and listening that is necessary. The SAO Catalogue of roughly 260,000 stars was culled for such "sibling" candidates using their spectra, location, and motion. Only a few of the roughly 50,000 tabulated G-stars proved interesting, in part because the information about almost all of them is imprecise, and in part perhaps because our criteria were overselective. However, a set of mostly untabulated sibling candidate stars can be defined, given a direction and small solid angle that are mutually interesting to members of that set, so that overlapping broadcast/receiving cones can be selected on the basis of this commonality. We believe that the double cone about the direction to the galactic center, with half angle α = e2/ h {combining short stroke overlay}c = 1 137 radian, is an almost inevitable choice. With current technology, sending as well as receiving within this small solid angle can reach to about 1 kpsc, making available an estimated 103 G-star sibling candidates.

UR - http://www.scopus.com/inward/record.url?scp=48749148471&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=48749148471&partnerID=8YFLogxK

U2 - 10.1016/0019-1035(83)90113-6

DO - 10.1016/0019-1035(83)90113-6

M3 - Article

AN - SCOPUS:48749148471

VL - 55

SP - 432

EP - 438

JO - Icarus

JF - Icarus

SN - 0019-1035

IS - 3

ER -