Protostars in the Elephant Trunk Nebula

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dc.creatorReach, William T.
dc.creatorRho, Jeonghee
dc.creatorYoung, Erick
dc.creatorMuzerolle, James
dc.creatorFajardo-Acosta, Sergio
dc.creatorHartmann, Lee
dc.creatorSicilia-Aguilar, Aurora
dc.creatorAllen, Lori
dc.creatorCarey, Sean
dc.creatorCuillandre, Jean-Charles
dc.creatorJarrett, Thomas H.
dc.creatorLowrance, Patrick
dc.creatorMarston, Anthony
dc.creatorNoriega-Crespo, Alberto
dc.creatorHurt, Robert L.
dc.date2004-06-13
dc.date.accessioned2026-07-07T11:29:25Z
dc.date.available2026-07-07T11:29:25Z
dc.descriptionThe optically-dark globule IC 1396A is revealed using Spitzer images at 3.6, 4.5, 5.8, 8, and 24 microns to be infrared-bright and to contain a set of previously unknown protostars. The mid-infrared colors of the 24 microns detected sources indicate several very young (Class I or 0) protostars and a dozen Class II stars. Three of the new sources (IC 1396A: gamma, delta, and epsilon) emit over 90% of their bolometric luminosities at wavelengths greater than 3 microns, and they are located within ~0.02 pc of the ionization front at the edge of the globule. Many of the sources have spectra that are still rising at 24 microns. The two previously-known young stars LkHa 349 a and c are both detected, with component c harboring a massive disk and component a being bare. Of order 5% of the mass of material in the globule is presently in the form of protostars in the 10^5 to 10^6 yr age range. This high star formation rate was likely triggered by radiation from a nearby O star.
dc.descriptionSpitzer first ApJS special issue (in press)
dc.identifierhttps://arxiv.org/abs/astro-ph/0406308
dc.identifierhttp://arxiv.org/abs/astro-ph/0406308
dc.identifierAstrophys.J.Suppl.154:385-390,2005
dc.identifierdoi:10.1086/422193
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196705
dc.subjectAstrophysics
dc.titleProtostars in the Elephant Trunk Nebula
dc.typetext

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