Results 111 to 120 of about 67,435 (221)

The Araucaria Project. The distance to the Sculptor group galaxy NGC 7793 from near-infrared photometry of Cepheid variables

EPJ Web of Conferences, 2017
We performed deep near-infrared J and K photometry of a field in the Sculptor Group spiral galaxy NGC 7793 using ESO VLT and HAWK-I instrument. We produced a sample of 14 Cepheids whose locations and periods of pulsation were known from our previous ...
Zgirski Bartlomiej, Gieren Wolfgang, Pietrzyński Grzegorz, Karczmarek Paulina, Górski Marek, Graczyk Dariusz, Pilecki Bogumil, Taormina Mónica, Suchomska Ksenia, Wielgórski Piotr, Konorski Piotr   +10 more
doaj   +1 more source

From Earths to Super-Earths: Five New Small Planets Transiting M Dwarf Stars

The Astronomical Journal
Earth-sized planets transiting M dwarf stars present one of the best opportunities with current facilities for studying the atmospheric and bulk compositions of terrestrial worlds. Here, we statistically validate five new transiting Earth and super-Earth
Jonathan Gomez Barrientos, Heather A. Knutson, Morgan Saidel, Michael Greklek-McKeon, W. Garrett Levine, Nicholas Saunders, Howard Isaacson, Renyu Hu, Karen A. Collins, David R. Ciardi, Polina A. Budnikova, Dmitry V. Cheryasov, Samuel W. Yee, Diogo Souto, Aida Behmard, Akihiko Fukui, Avi Shporer, Akanksha Khandelwal, Bob Massey, Brice-Oliver Demory, Catherine A. Clark, Chris Stockdale, Emily A. Gilbert, Enric Palle, Francis P. Wilkin, Felipe Murgas, Francis Zong Lang, Ilse Plauchu-Frayn, Jessie L. Christiansen, Jon M. Jenkins, Joseph D. Twicken, Keith Horne, Michaël Gillon, Monika Lendl, Michael B. Lund, Norio Narita, Pam Rowden, Ramotholo Sefako, Richard P. Schwarz, Steven Giacalone, Urs Schroffenegger, Yilen Gómez Maqueo Chew   +41 more
doaj   +1 more source

Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XXI. Candidate Red Quasars at z ≥ 6 from Near-infrared Photometry

The Astrophysical Journal
We present an analysis of near-infrared photometry of 59 quasars at 5.83  −24 mag) of the sample. This luminosity trend may support the idea that red quasars represent an evolutionary stage preceding unobscured quasars, often invoked in the merger-driven
Ryo Iwamoto, Yoshiki Matsuoka, Masatoshi Imanishi, Kazushi Iwasawa, Takuma Izumi, Nobunari Kashikawa, Toshihiro Kawaguchi, Mahoshi Sawamura, Michael A. Strauss, Ayumi Takahashi, Yoshiki Toba   +10 more
doaj   +1 more source

A METHOD FOR DETERMINING THE PHYSICAL PARAMETERS OF HOT SUPERGIANTS BASED ON SPECTRAL ENERGY DISTRIBUTION ANALYSIS

Physical Sciences and Technology
This study determines the physical parameters of B- and A-type hot supergiants through the construction and analysis of their spectral energy distributions (SEDs).
Alina Gyuchtash, Shakhida Nurmakhametova, Nadezhda Vaidman, Serik Khokhlov, Aldiyar Agishev, Aigerim Bakhytkyzy   +5 more
doaj   +1 more source

Identifying and Characterizing Infrared Excesses in the Spitzer Kepler Survey (SpiKeS)

The Astrophysical Journal
We report our search for infrared excesses in the Spitzer/Infrared Array Camera survey of the Kepler field at 3.6 and 4.5 μ m. The Spitzer Kepler Survey contains ∼190,000 targets, which we reduce to ∼117,000 targets after applying multiple filters to ...
Sydney O. Skorpen, Farisa Y. Morales, Varoujan Gorjian, Michael W. Werner, Geoffrey Bryden   +4 more
doaj   +1 more source

The Baryonic Tully–Fisher Relation. I. WISE/Spitzer Photometry

The Astronomical Journal
We present Wide-field Infrared Survey Explorer (WISE) W1 photometry of the Spitzer Photometry and Accurate Rotation Curves sample. The baseline of near-IR fluxes is established for use by stellar mass models, a key component to the baryonic Tully–Fisher ...
Francis Duey, James Schombert, Stacy McGaugh, Federico Lelli   +3 more
doaj   +1 more source

Peering through the veil: near-infrared photometry and extinction for the Galactic nuclear star cluster

, 2009
The aims of this work are to provide accurate photometry in multiple near-infrared broadband filters, to determine the power-law index of the extinction-law toward the central parsec of the Galaxy, to provide measurements of the absolute extinction ...
Eckart, A., Muzic, K., Najarro, F., Schoedel, R.   +3 more
core   +1 more source

Photometric Mapping of Carbonaceous/Siliceous Dust and Water Ice in the ISM with JWST: Applications to the Dense Sightlines

The Astronomical Journal
We introduce a new photometric mapping method for the James Webb Space Telescope (JWST) to measure the spatial distribution of carbonaceous dust, siliceous dust, and water ice by using absorption features arising from the grains in the dense interstellar
Burcu Günay, Karl D. Gordon, Joshua E. G. Peek, Marjorie Decleir, Dries Van De Putte, Kirill Tchernyshyov, Michael G. Burton   +6 more
doaj   +1 more source

The Whole is Greater than the Sum of the Parts: Optimizing the Joint Science Return from LSST, Euclid and WFIRST [PDF]

, 2015
The focus of this report is on the opportunities enabled by the combination of LSST, Euclid and WFIRST, the optical surveys that will be an essential part of the next decade's astronomy.
Bean, R., Connolly, A., Dell'antonio, I., Frieman, J., Gawiser, E., Gehrels, N., Gladney, L., Heitmann, K., Helou, G., Hirata, C., Ho, S., Ivezić, Ž., Jain, B., Jarvis, M., Kahn, S., Kalirai, J., Kim, A., Lupton, R., Mandelbaum, R., Marshall, P., Newman, J. A., Perlmutter, S., Postman, M., Rhodes, J., Spergel, D., Strauss, M. A., Tyson, J. A., Walkowicz, L., Wood-Vasey, W. M.   +28 more
core   +1 more source

A Highly Magnetic Ultramassive White Dwarf with a 23 minute Rotation Period

The Astrophysical Journal
We present a physical characterization of Tsinghua University-Ma Huateng Telescope for Survey (TMTS) J00063798+3104160 (J0006), a rapidly rotating, ultramassive white dwarf (WD) identified in high-cadence light curves from the TMTS.
Jincheng Guo, Xiaofeng Wang, Qichun Liu, Alexei V. Filippenko, Thomas G. Brink, Jingkun Zhao, WeiKang Zhang, Yi Yang, Jie Lin, Haowei Peng, Hailiang Chen, Davron O. Mirzaqulov, Shuhrat A. Ehgamberdiev, Bin Ma, Jun Mo, Cheng Liu, Gaobo Xi, Xiaojun Jiang, Danfeng Xiang, Jicheng Zhang   +19 more
doaj   +1 more source