scispace - formally typeset
Open AccessJournal ArticleDOI

Fundamental parameters and infrared excesses of Hipparcos stars

Iain McDonald, +2 more
- 21 Nov 2012 - 
- Vol. 427, Iss: 1, pp 343-357
Reads0
Chats0
TLDR
In this paper, the fundamental parameters (temperature and luminosity) of 107 619 Hipparcos stars and place these stars on a true Hertzsprung-Russell diagram were derived by comparing bt-settl model atmospheres to spectral energy distributions.
Abstract
We derive the fundamental parameters (temperature and luminosity) of 107 619 Hipparcos stars and place these stars on a true Hertzsprung–Russell diagram. This is achieved by comparing bt-settl model atmospheres to spectral energy distributions (SEDs) created from Hipparcos, Tycho, Sloan Digital Sky Survey, DENIS, Two Micron All Sky Survey, MSX, AKARI, IRAS and Wide-field Infrared Survey Explorer data. We also identify and quantify from these SEDs any infrared excesses attributable to circumstellar matter. We compare our results to known types of objects, focusing on the giant branch stars. Giant star dust production (as traced by infrared excess) is found to start in earnest around 680 L⊙.

read more

Citations
More filters
Journal ArticleDOI

Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes

TL;DR: In this paper, the authors present empirical measurements of the radii of 116 stars that host transiting planets using only direct observables-the bolometric flux at Earth, the effective temperature, and the parallax provided by the Gaia first data release-and thus are virtually model independent, extinction being the only free parameter.
Journal ArticleDOI

Spectroscopic Confirmation of Young Planetary-mass Companions on Wide Orbits

TL;DR: In this paper, moderate-resolution (R ~ 4000-5000) near-infrared integral field spectroscopy of the young (1-5 Myr) 6-14 M_(Jup) companions ROXs 42B b and FW Tau b was obtained with Keck/OSIRIS and Gemini-North/NIFS.
Journal ArticleDOI

Fundamental parameters and infrared excesses of Tycho–Gaia stars

TL;DR: In this article, the authors calculated effective temperatures and luminosities for 1475 921 Tycho-2 and 107 145 Hipparcos stars, based on distances from Gaia Data Release 1.
Journal ArticleDOI

Debris disks in the scorpius–centaurus ob association resolved by alma

TL;DR: In this paper, the authors presented a CO(2-1) and 1240 μm continuum survey of 23 debris disks with spectral types B9-G1, observed at an angular resolution of 0.5-1'' with the Atacama Large Millimeter/Submillimeter Array (ALMA).
References
More filters
Journal ArticleDOI

Validation of the new Hipparcos reduction

TL;DR: In this article, a new reduction of the Hipparcos data was published, which claimed accuracies for nearly all stars brighter than magnitude Hp = 8 to be better, by up to a factor 4, than in the original catalog.
Journal ArticleDOI

A grid of MARCS model atmospheres for late-type stars. I. Methods and general properties

TL;DR: In this article, an extensive grid of spherically-symmetric models (supplemented with plane-parallel ones for the highest surface gravities), built on up-to-date atomic and molecular data, is presented.
Journal ArticleDOI

The Dartmouth Stellar Evolution Database

TL;DR: The Dartmouth Stellar Evolution Database as mentioned in this paper is a collection of stellar evolution tracks and isochrones that spans a range of [Fe/H] from 2.5 to +0.5, [α/Fe] from 0.245 to 0.40, and initial He mass fractions from Y = 0.1 and 4 M
Related Papers (5)

Gaia Data Release 2. Summary of the contents and survey properties

Anthony G. A. Brown, +452 more