C.D.S. - SIMBAD4 rel 1.7 - 2021.05.17CEST20:31:20

2019A&A...626A..84E - Astronomy and Astrophysics, volume 626A, 84-84 (2019/6-1)

Analysis and test of the central-blue-spot infall hallmark.


Abstract (from CDS):

Aims. The infall of material onto a protostar, in the case of optically thick line emission, produces an asymmetry in the blue- and red-wing line emissions. For an angularly resolved emission, this translates in a blue central spot in the first-order moment (intensity weighted velocity) map.
Methods. An analytical expression for the first-order moment intensity as a function of the projected distance was derived, for the cases of infinite and finite infall radius. The effect of a finite angular resolution, which requires the numerical convolution with the beam, was also studied.
Results. This method was applied to existing data of several star-forming regions, namely G31.41+0.31 HMC, B335, and LDN 1287, obtaining good fits to the first-order moment intensity maps, and deriving values of the central masses onto which the infall is taking place (G31.41+0.31 HMC: 70-120M; B335: 0.1M; Guitar Core of LDN 1287: 4.8M). The central-blue-spot infall hallmark appears to be a robust and reliable indicator of infall.

Abstract Copyright: © ESO 2019

Journal keyword(s): ISM: jets and outflows - ISM: individual objects: G31.41+0.31 HMC - ISM: individual objects: B335 - stars: formation - ISM: individual objects: LDN 1287

Errata: erratum vol. 647, art. C2 (2021)

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 JCMTSE J003646.4+632902 Rad 00 36 47.3660 +63 29 02.237           ~ 14 0
2 LDN 1287 DNe 00 36 47.5 +63 29 02           ~ 86 0
3 IRAS 18449-0115 cor 18 47 34.4947 -01 12 40.269           ~ 324 0
4 LDN 663 DNe 19 36 55 +07 34.4           ~ 571 0

    Equat.    Gal    SGal    Ecl

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