Results 31 to 40 of about 67,435 (221)

A Multiwavelength Classification and Study of Red Supergiant Candidates in NGC 6946

The Astrophysical Journal, 2023
We have combined resolved stellar photometry from Hubble Space Telescope (HST), Spitzer, and Gaia to identify red supergiant (RSG) candidates in NGC 6946, based on their colors, proper motions, visual morphologies, and spectral energy distributions.
Jared R. Johnson, Brad Koplitz, Benjamin F. Williams, Julianne J. Dalcanton, Andrew Dolphin, Léo Girardi   +5 more
doaj   +1 more source

A colour-excess extinction map of the southern Galactic disc from the VVV and GLIMPSE surveys [PDF]

, 2019
An improved high-resolution and deep A Ks foreground dust extinction map is presented for the Galactic disc area within 295◦ ≾ l ≾ 350◦, −1.0◦ ≾ b ≾ +1.0◦. At some longitudes the map reaches up to |b| ~ 2.25◦, for a total of ~148 deg 2.
Alonso, M. V., Alonso-García, J., Baravalle, L. D., Barbieri, M., Barbá, R., Bidin, C. Moni, Borissova, J., Emerson, J. P., Firpo, V., Geisler, D., Gurovich, S., Haikala, L., Hempel, M., Kunder, A., Kurtev, R., Leone, G., Lucas, P., Majaess, D., Milla, F., Minniti, D., Morelli, L., Nilo-Castellón, J. L., Ramos, R. Contreras, Rejkuba, M., Roman-Lopes, A., Saito, R. K., Soto, M.   +26 more
core   +5 more sources

A Southern Photometric Quasar Catalog from the Dark Energy Survey Data Release 2

The Astrophysical Journal Supplement Series, 2022
We present a catalog of 1.4 million photometrically selected quasar candidates in the southern hemisphere over the ∼5000 deg ^2 Dark Energy Survey (DES) wide survey area. We combine optical photometry from the DES second data release (DR2) with available
Qian Yang, Yue Shen
doaj   +1 more source

IRTF Observations of White Dwarfs with Possible Near-Infrared Excess [PDF]

, 2009
Near-infrared photometry and spectroscopy is obtained for a heterogeneous sample of nearby white dwarfs with possible excess flux as identified primarily in the Two Micron All Sky Survey. Among the sample of 43 stars are a number of white dwarfs that are
Adelman-McCarthy, Beauchamp, Becklin, Bergeron, Bergeron, Bergeron, Bergeron, Bergeron, Bergeron, Bergeron, Bochanski, Burleigh, Burleigh, Carpenter, Catalán, Copenhagen University Observatory, Cushing, DENIS Consortium, Dobbie, Downes, Dreizler, Dufour, Dupuis, Eggen, Eggen, Eisenstein, Farihi, Farihi, Farihi, Farihi, Farihi, Green, Green, Greenstein, Greenstein, Hagen, Holberg, Homeier, J. Farihi, Jordan, Jura, Jura, Kalirai, Kawka, Kilic, Kilic, Kilkenny, Kirkpatrick, Kleinman, Koester, Koester, Koester, Koester, Liebert, Liebert, Liebert, Liebert, Liebert, Lisker, Massey, McCook, McCook, Monet, Morales-Rueda, Napiwotzki, Nelemans, Pauli, Probst, Putney, Raymond, Rayner, Rebassa-Mansergas, Reid, Salim, Schmidt, Schmidt, Schmidt, Silvestri, Sion, Skrutskie, Steele, van Altena, Vennes, von Hippel, Voss, Wachter, Wellhouse, Williams, Wolff, Zacharias, Zacharias, Zuckerman, Zuckerman, Zuckerman   +93 more
core   +2 more sources

Externally-polluted white dwarfs with dust disks [PDF]

, 2007
We report Spitzer Space Telescope photometry of eleven externally-polluted white dwarfs. Of the nine stars for which we have IRAC photometry, we find that GD 40, GD 133 and PG 1015+161 each has an infrared excess that can be understood as arising from a ...
B. Zuckerman, J. Farihi, M. Jura, Pringle J. E.   +3 more
core   +2 more sources

New Near-infrared Period–Luminosity–Metallicity Relations for Galactic RR Lyrae Stars Based on Gaia EDR3 Parallaxes

The Astrophysical Journal, 2023
We present new period–luminosity and period–luminosity–metallicity relations for Galactic RR Lyrae stars based on a sample of 28 pulsators located at distances of up to 1.5 kpc from the Sun.
Bartłomiej Zgirski, Grzegorz Pietrzyński, Marek Górski, Wolfgang Gieren, Piotr Wielgórski, Paulina Karczmarek, Gergely Hajdu, Megan Lewis, Rolf Chini, Dariusz Graczyk, Mikołaj Kałuszyński, Weronika Narloch, Bogumił Pilecki, Gonzalo Rojas García, Ksenia Suchomska, Mónica Taormina   +15 more
doaj   +1 more source

Searching for Stars in Compact High-Velocity Clouds. I First Results from VLT and 2MASS [PDF]

, 2002
We investigate the hypothesis that compact high-velocity clouds (CHVC) are the "missing" dwarf galaxies of the Local Group, by searching them for populations of resolved stars.
J. Kerp, R. E. Schulte-Ladbeck, Spergel, U. Hopp   +3 more
core   +2 more sources

Near-Infrared Photometry of Blazars

, 1999
Two days of observations were conducted at the Palomar Observatory during the nights of 25 and 26 February 1997 with the Hale telescope, in order to search for rapid variability in the near-infrared (NIR) bands J, H, Ks for a selection of eight blazars.
Chapuis, C., Corbel, S., Durouchoux, P., Gautier, T. N., Mahoney, W.   +4 more
openaire   +3 more sources

INFRARED PHOTOMETRY OF SAKURAI'S OBJECT (V4334 Sgr) IN 1996-2000

Odessa Astronomical Publications, 2017
The results of the photometric observations of V4334 Sgr and characteristics of its evolution after outburst are presented.
A. M. Tatarnikov, V. I. Shenavrin, P. A. Whitelock, M. W. Feast, B. F. Yudin   +4 more
doaj   +1 more source

Near-infrared photometry of globular clusters towards the Galactic bulge: Observations and photometric metallicity indicators [PDF]

, 2016
Indexación: Web of Science; Scopus.We present wide-field JHKS photometry of 16 Galactic globular clusters located towards the Galactic bulge, calibrated on the Two Micron All-Sky Survey photometric system.
Bidin, C.M., Bonatto, C., Cohen, R.E., Geisler, D., Mauro, F.   +4 more
core   +2 more sources