WISE photometry of EXor sources and candidates
arXiv:1209.0485 · doi:10.1016/j.newast.2013.01.005
Abstract
We present a collection of WISE photometry of EXor sources and candidates (more recently identified). This represents the first complete survey of such objects in the mid-IR (3.4 - 22 um) that was carried out with the same instrumentation. Two-color diagrams constructed with WISE data evidence a clear segregation between classical and newly identified sources, being these latter characterized by colder (and less evolved) circumstellar disks. By combining 2MASS and WISE data, we obtain spectral energy distributions (SED's) that are compatible with the existence of an inner hole in the circumstellar disk. A compilation of all EXor observations given in the literature at wavelengths very similar to those of WISE is also provided. This allows us to study their mid-IR variability, which has been poorly investigated so far and without any coordination with shorter wavelengths surveys. The presented it WISE photometry and the compilation of the literature data are intended as a first step toward the construction of a significant database in this spectral regime. Preliminary indications on the mechanisms responsible for the luminosity fluctuations are provided.
Accepted by New Astronomy
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Cited by in corpus (5)
- Quantifying Variability of YSOs in the Mid-IR Over Six Years with NEOWISE
- Discovery and Observations of ASASSN-13db, an EX Lupi-Type Accretion Event on a Low-Mass T Tauri Star
- On the mid-IR variability of candidate eruptive variables (EXors): a comparison between Spitzer and WISE data
- The circumstellar environment of EX Lup: the SPHERE and SINFONI views
- Mid- and Far-Infrared Variability of PV Cep