SIMBAD references

2002AJ....124.2164A - Astron. J., 124, 2164-2177 (2002/October-0)

A spectroscopic and photometric survey of stars in the field of L1457: a new distance determination.

ANDERSSON B.-G., IDZI R., UOMOTO A., WANNIER P.G., CHEN B. and JORGENSEN A.M.

Abstract (from CDS):

We present a spectroscopic and photometric survey of a sample of field stars in the region of the molecular cloud L1457. High-quality coudé feed spectra, together with five-band photometry in the Sloan Digital Sky Survey system and near-infrared archival data from the Two Micron All Sky Survey, are used to derive color excesses and distances for the stars. Based on these data, a new distance estimate of 360±30 pc is derived for the cloud, supporting recent results by K. L. Luhman. The data further indicate that the north-south velocity gradient seen in the millimeter-wave CO data is mirrored in a distance gradient, with the northern part of the cloud being closer to us. A second, less opaque, layer of extinction is detected at ∼80 pc. This distance is consistent with the earlier distance estimates to the cloud, based on Na I absorption. We identify this layer with the wall of the hot Local Bubble. Hence, the dense cloud is not, as previously thought, associated with the Local Bubble.

Abstract Copyright:

Journal keyword(s): ISM: Individual: Alphanumeric: L1457

VizieR on-line data: <Available at CDS (J/AJ/124/2164): table2.dat table3.dat table4.dat>

Errata: erratum vol. 126, p. 2087 (2003)

Simbad objects: 204

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