Results 21 to 30 of about 91,007 (306)

CLOSE BINARIES WITH INFRARED EXCESS: DESTROYERS OF WORLDS? [PDF]

The Astrophysical Journal, 2010
Accepted by The Astrophysical ...
Matranga, M., Drake, J. J., Kashyap, V. L., Marengo, M., Kuchner, M. J.   +4 more
openaire   +2 more sources

DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission [PDF]

, 2011
We present a method which uses colour–colour cuts on the Sloan Digital Sky Survey (SDSS) photometry to select white dwarfs with hydrogen-rich (DA) atmospheres without the recourse to spectroscopy.
Farihi, J., Breedt, E, J. Girven, Koester, Detlev, Gänsicke, B. T., Gänsicke, BT, Farihi, J, Koester, D, Steeghs, D., Gaensicke, B. T., Koester, D., Girven, Jonathan, Breedt, E., D. Koester, Parsons, S. G., D. Steeghs, Parsons, SG, Girven, J., B. T. Gänsicke, Girven, J   +19 more
core   +1 more source

Sudden Extreme Obscuration of a Sun-like Main-sequence Star: Evolution of the Circumstellar Dust around ASASSN-21qj

The Astrophysical Journal, 2023
ASASSN-21qj is a distant Sun-like star that recently began an episode of deep dimming events after no prior recorded variability. Here we examine archival and newly obtained optical and near-infrared data of this star.
Jonathan P. Marshall, Steve Ertel, Francisca Kemper, Carlos del Burgo, Gilles P. P. L. Otten, Peter Scicluna, Sascha T. Zeegers, Álvaro Ribas, Oscar Morata   +8 more
doaj   +1 more source

Population III and the near-infrared background excess [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2005
Abstract We make a critical assessment of models that attribute the recently detected near-infrared background ‘excess’ (NIRBE) to the redshifted light from Population III objects. To supply the required 25 keV per baryon at redshift 9, Population III massive stars must form with an efficiency exceeding 30 per cent in all ‘minihaloes ...
Madau, P, Silk, J
openaire   +3 more sources

The Frequency of Mid‐Infrared Excess Sources in Galactic Surveys [PDF]

The Astrophysical Journal, 2007
We have identified 230 Tycho-2 Spectral Catalog stars that exhibit 8 micron mid-infrared extraphotospheric excesses in the MidCourse Space Experiment (MSX) and Spitzer Space Telescope Galactic Legacy MidPlane Survey Extraordinaire (GLIMPSE) surveys. Of these, 183 are either OB stars earlier than B8 in which the excess plausibly arises from a thermal ...
Uzpen, B., Kobulnicky, H. A., Monson, A. J., Pierce, M. J., Clemens, D. P., Backman, D. E., Meade, M. R., Babler, B. L., Indebetouw, R., Whitney, B. A., Watson, C., Wolfire, M. G., Benjamin, R. A., Bracker, S., Bania, T. M., Cohen, M., Cyganowski, C. J., Devine, K. E., Heitsch, F., Jackson, J. M., Mathis, J. S., Mercer, E. P., Povich, M. S., Rho, J., Robitaille, T. P., Sewilo, M., Stolovy, S. R., Watson, D. F., Wolff, M. J., Churchwell, E.   +29 more
openaire   +2 more sources

Dust formation of Be stars with large infrared excess [PDF]

, 2010
Classical Be stars, in addition to their emission-line spectra, are associated with infrared excess which is attributable to free-free emission from ionized gas. However, a few with exceptionally large near-infrared excess, namely with J–H, and H–Ks both
Wen-Ping Chen, Chien-De Lee
core   +1 more source

Infrared Excess of a Large OB Star Sample [PDF]

, 2022
The infrared (IR) excess from OB stars is commonly considered to be a contribution from ionized stellar wind or circumstellar dust. With the newly published Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST)-OB catalog and Galactic O-Star ...
Deng, D., Wang, T., Deng, Dingshan, Sun, Yang, Wang, Tianding, Jiang, Biwei, Sun, Y., Wang, Y., Wang, Yuxi, Jiang, B.   +9 more
core   +2 more sources

Ultraviolet-excess sources with a red/infrared counterpart: low-mass companions, debris discs and QSO selection [PDF]

, 2014
We present the result of the cross-matching between ultraviolet (UV)-excess sources selected from the UV-Excess Survey of the Northern Galactic Plane (UVEX) and several infrared (IR) surveys (2MASS, UKIDSS and WISE).
Wright, Nicholas J.
core   +1 more source

Water Stress Index Detection Using a Low-Cost Infrared Sensor and Excess Green Image Processing

Sensors, 2023
Precision Irrigation (PI) is a promising technique for monitoring and controlling water use that allows for meeting crop water requirements based on site-specific data. However, implementing the PI needs precise data on water evapotranspiration.
Rodrigo Leme de Paulo, Angel Pontin Garcia, Claudio Kiyoshi Umezu, Antonio Pires de Camargo, Fabrício Theodoro Soares, Daniel Albiero   +5 more
doaj   +1 more source

Infrared Excess of RY SGR

The Astrophysical Journal, 1969
IR excess of R CrB type variable star RY Sgr, noting visual brightness and radiation in 2.0-3.4 micron ...
T. A. Lee, M. W. Feast
openaire   +1 more source