X-ray and Near-infrared Studies of a Star-forming Cloud; L1448

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dc.creatorTsujimoto, M.
dc.creatorKobayashi, N.
dc.creatorTsuboi, Y.
dc.date2005-06-27
dc.date.accessioned2026-07-07T11:24:30Z
dc.date.available2026-07-07T11:24:30Z
dc.descriptionWe present the results of X-ray and near-infrared (NIR) observations of L1448, a star-forming region in the Perseus cloud complex using the Chandra X-ray Observatory and the 4 m telescope at the Kitt Peak National Observatory. We detect 72 X-ray sources in a ~17 arcmin x 17 arcmin region with a ~68 ks ACIS exposure, for which we conduct follow-up NIR imaging observations in a concentric ~11 arcmin x 11 arcmin region with FLAMINGOS down to m_Ks ~ 17 mag. Twelve X-ray sources have NIR or optical counterparts. By plotting X-ray mean energy versus NIR to X-ray flux ratio, the X-ray sources are clearly separated into two groups. The X-ray spectral and temporal features as well as NIR magnitudes and colors indicate that one group mainly consists of young stellar objects (YSOs) in the cloud and the other of background extragalactic sources. Ten X-ray-emitting YSO candidates are thus newly identified, which are low-mass or brown dwarf mass sources from their NIR magnitudes. In addition, a possible X-ray signal is found from a mid-infrared protostar L1448 IRS 3(A). The lack of detection of this source in our deep NIR images indicates that this source has a very steep spectral slope of > 3.2 in 2--10 micron.
dc.description13 pages, 7 postscript figures, accepted for publication in AJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0506628
dc.identifierhttp://arxiv.org/abs/astro-ph/0506628
dc.identifierAstron.J.130:2212-2219,2005
dc.identifierdoi:10.1086/444352
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195213
dc.subjectAstrophysics
dc.titleX-ray and Near-infrared Studies of a Star-forming Cloud; L1448
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