SIMBAD references

2003ApJ...597..555M - Astrophys. J., 597, 555-565 (2003/November-1)

Using narrowband photometry to detect young brown dwarfs in IC 348.

MAINZER A.K. and McLEAN I.S.

Abstract (from CDS):

We report the discovery of a population of young brown dwarf candidates in the open star cluster IC 348 and the development of a new spectroscopic classification technique using narrowband photometry. Observations were made using FLITECAM, the First Light Camera for SOFIA, at the 3 m Shane telescope at Lick Observatory. FLITECAM is a new 1-5 µm camera with an 8' field of view. Custom narrowband filters were developed to detect absorption features of water vapor (at 1.495 µm) and methane (at 1.66 µm) characteristic of brown dwarfs. These filters enable spectral classification of stars and brown dwarfs without spectroscopy. FLITECAM's narrow- and broadband photometry was verified by examining the color-color and color-magnitude characteristics of stars whose spectral type and reddening was known from previous surveys. Using our narrowband filter photometry method, it was possible to identify an object measured with a signal-to-noise ratio of 20 or better to within ±3 spectral class subtypes for late-type stars. With this technique, very deep images of the central region of IC 348 (H∼20.0) have identified 18 sources as possible L or T dwarf candidates. Out of these 18, we expect that between 3 and 6 of these objects are statistically likely to be background stars, the remainder being true low-mass members of the cluster. If confirmed as cluster members, then these are very low mass objects (∼5MJup). We also describe how two additional narrowband filters can improve the contrast between M, L, and T dwarfs as well as provide a means to determine the reddening of an individual object.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Stars: Formation - Stars: Low-Mass, Brown Dwarfs - Stars: Pre-Main-Sequence

VizieR on-line data: <Available at CDS (J/ApJ/597/555): table4.dat>

Nomenclature: Table 4: Cl* IC 348 MM NNN (Nos 1-149).

CDS comments: Table 4: identification ACIS NNN not identified, not in SIMBAD.

Simbad objects: 197

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2003ApJ...597..555M and select 'bookmark this link' or equivalent in the popup menu


2023.01.31-10:52:12

© Université de Strasbourg/CNRS

    • Contact