dc.contributor.author |
Paegert, M |
|
dc.contributor.author |
Stassun, K. G |
|
dc.contributor.author |
De Lee, N |
|
dc.contributor.author |
Pepper, J |
|
dc.contributor.author |
Fleming, S. W |
|
dc.contributor.author |
Sivarani, T |
|
dc.contributor.author |
Mahadevan, S |
|
dc.contributor.author |
Mack, C. E |
|
dc.contributor.author |
Dhital, S |
|
dc.contributor.author |
Hebb, L |
|
dc.contributor.author |
Ge, J |
|
dc.date.accessioned |
2020-11-12T14:27:27Z |
|
dc.date.available |
2020-11-12T14:27:27Z |
|
dc.date.issued |
2015-06 |
|
dc.identifier.citation |
The Astronomical Journal, Vol. 149, No. 6, 186 |
en_US |
dc.identifier.issn |
1538-3881 |
|
dc.identifier.uri |
http://prints.iiap.res.in/handle/2248/6924 |
|
dc.description |
Restricted Access © IOP Publishing http://dx.doi.org/10.1088/0004-6256/149/6/186 |
en_US |
dc.description.abstract |
We present the target selection process for the Multi-object APO Radial Velocity Exoplanets Large-area Survey (MARVELS), which is part of the Sloan Digital Sky Survey (SDSS) III. MARVELS is a medium-resolution (R ∼ 11,000) multi-fiber spectrograph capable of obtaining radial velocities for 60 objects at a time in order to find brown dwarfs and giant planets. The survey was configured to target dwarf stars with effective temperatures approximately between 4500 and 6250 K. For the first 2 years MARVELS relied on low-resolution spectroscopic pre-observations to estimate the effective temperature and log( ) g for candidate stars and then selected suitable dwarf stars from this pool. Ultimately, the pre-observation spectra proved ineffective at filtering out giant stars; many giants were incorrectly classified as dwarfs, resulting in a giant contamination rate of ∼30% for the first phase of the MARVELS survey. Thereafter, the survey instead applied a reduced proper motion cut to eliminate giants and used the Infrared Flux Method to estimate effective temperatures, using only extant photmetric and proper-motion catalog information. The target selection method introduced here may be useful for other surveys that need to rely on extant catalog data for selection of specific stellar populations. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
IOP Publishing |
en_US |
dc.subject |
Catalogs |
en_US |
dc.subject |
Planets and satellites: detection |
en_US |
dc.subject |
Stars: general |
en_US |
dc.subject |
Surveys |
en_US |
dc.subject |
Techniques: radial velocities |
en_US |
dc.title |
Target selection for the SDSS-III marvels survey |
en_US |
dc.type |
Article |
en_US |