SIMBAD references

2012ApJ...751...22B - Astrophys. J., 751, 22 (2012/May-3)

A significant population of candidate new members of the ρ Ophiuchi cluster.


Abstract (from CDS):

We present a general method for identifying the pre-main-sequence population of any star-forming region, unbiased with respect to the presence or absence of disks, in contrast to samples selected primarily via their mid-infrared emission from Spitzer surveys. We have applied this technique to a new, deep, wide-field, near-infrared imaging survey of the ρ Ophiuchi cloud core to search for candidate low-mass members. In conjunction with published Spitzer IRAC photometry and least-squares fits of model spectra (COND, DUSTY, NextGen, and blackbody) to the observed spectral energy distributions, we have identified 948 candidate cloud members within our 90% completeness limits of J = 20.0, H = 20.0, and Ks= 18.50. This population represents a factor of ∼3 increase in the number of known young stellar objects in the ρ Ophiuchi cloud. A large fraction of the candidate cluster members (81%±3%) exhibit infrared excess emission consistent with the presence of disks, thus strengthening the possibility of their being bona fide cloud members. Spectroscopic follow-up will confirm the nature of individual objects, better constrain their parameters, and allow an initial mass function to be derived.

Abstract Copyright:

Journal keyword(s): infrared: stars - ISM: individual: Rho Ophiuchi - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/ApJ/751/22): table3.dat table4.dat>

Nomenclature: Table 3: [BHM2012b] NNN (Nos 1-948).

Simbad objects: 1078

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