Results 101 to 110 of about 30,917 (231)

An HST survey of 33 T8 to Y1 brown dwarfs: NIR photometry and multiplicity of the coldest isolated objects [PDF]

, 2023
C. Fontanive, L. R. Bedin, Matthew De Furio, Beth Biller, Jay Anderson, M. Bonavita, Katelyn Allers, B. Pantoja   +7 more
openalex   +1 more source

X-Ray and Infrared Analysis on a Faint Polar RX J1745.5-2905

The Astrophysical Journal
RX J1745.5-2905 is a faint and distant polar below the period gap. It was observed intensively in X-ray by Chandra, and its X-ray data reveal frequent brightness transitions between low and high states like we found in the prototype star AM Her.
Qishan Wang, Xiaohui Fang, Shengbang Qian   +2 more
doaj   +1 more source

Extensive HST Ultraviolet Spectra and Multi-wavelength Observations of SN 2014J in M82 Indicate Reddening and Circumstellar Scattering by Typical Dust

, 2014
SN 2014J in M82 is the closest detected Type Ia supernova (SN Ia) in at least 28 years and perhaps in 410 years. Despite its small distance of 3.3 Mpc, SN 2014J is surprisingly faint, peaking at V = 10.6 mag, and assuming a typical SN Ia luminosity, we ...
Challis, P., Filippenko, A. V., Folatelli, G., Foley, Ryan J., Fox, O. D., Hillebrandt, W., Hsiao, E. Y., Jha, S. W., Kirshner, R. P., Kromer, M., Marion, G. H., McCully, C., Nelson, M., Pakmor, R., Phillips, M. M., Pignata, G., Roepke, F. K., Sand, D. J., Seitenzahl, I. R., Silverman, J. M., Skrutskie, M., Stritzinger, M. D., Zheng, W.   +22 more
core   +1 more source

The globular cluster system of NGC 1316. II - The extraordinary object SH2 [PDF]

, 2012
SH2 has been described as an isolated HII-region, located about 6.5 arcmin south of the nucleus of NGC 1316 (Fornax A), a merger remnant in the the outskirts of the Fornax cluster of galaxies.
A. J. Romanowsky, Arnaboldi, B. Dirsch, B. Kumar, Bedregal, Chabrier, Dirsch, D’Onofrio, Goudfrooij, Goudfrooij, Gómez, Horellou, Kim, Kobulnicky, Kobulnicky, Kuntschner, L. P. Bassino, Lanz, Longhetti, Mackie, Marigo, McNeil-Moylan, Nowak, Richtler, Schuberth, Schweizer, Shaya, Sirianni, Stritzinger, T. Richtler   +29 more
core   +3 more sources

ИССЛЕДОВАНИЕ АКТИВНОСТИ ЯДРА СЕЙФЕРТОВСКОЙ ГАКТИКИ NGC 7469 ЗА ПЕРИОД НАБЛЮДЕНИЙ С1990-2008 ГГ.

Odessa Astronomical Publications, 2011
We combine many published photometrical observations of the Seyfert Galaxy (SG) NGC 7469 and also new results from Hubble Space Telescope which can be used for future research of some properties of the activity of the nuclear of the SG.
Л. С. Уголькова, Б. П. Артамонов   +1 more
doaj   +1 more source

Grouping Normal Type Ia Supernovae by UV to Optical Color Differences [PDF]

, 2013
Observations of many SNe Ia with the UVOT instrument on the Swift satellite has revealed that there exists order to the differences in the UV-OPT colors of normal SNe.
Brown, Peter J., Bufano, Filomena, Gehrels, Neil, Milne, Peter A., Roming, Peter W. A.   +4 more
core   +3 more sources

Ages of M33 Star Clusters Based on the HST/WFPC2 Photometry

, 2009
We present a result of age estimation for star clusters in M33. We obtain color-magnitude diagrams (CMDs) of resolved stars in 242 star clusters from the HST/WFPC2 images. We estimate ages of 100 star clusters among these, by fitting the Padova theoretical isochrones to the observational CMDs. Age distribution of the star clusters shows a dominant peak
Park, Won-Kee, Park, Hong Soo, Lee, Myung Gyoon   +2 more
openaire   +2 more sources

Measuring the Stellar Masses of z~7 Galaxies with Spitzer Ultrafaint Survey Program (SURFS UP)

, 2014
We present Spitzer/IRAC observations of nine $z'$-band dropouts highly magnified (27. By modeling the broadband photometry, we estimate the galaxy has an intrinsic star-formation rate of SFR~1.3 M_sol/yr and stellar mass of M~2x10^9 M_sol, which gives a ...
Allen, S., Bradac, M., Cain, B., Casertano, S., Gladders, M., Gonzalez, A. H., Hall, N., Hildebradt, H., Hinz, J., Huang, K. -H., Lemaux, B. C., Linden, A., Lubin, L., Ryan, R. E., Schrabback, T., Stiavelli, M., Treu, T., Zaritsky, D.   +17 more
core   +3 more sources

HST Survey of Clusters in Nearby Galaxies. I. Detection and Photometry

, 2001
26 pages, 22 figures to appear in ...
Dolphin, Andrew E., Kennicutt Jr, Robert C.   +1 more
openaire   +2 more sources

The Perfect Host: JWST Cepheid Observations in a Background-free Type Ia Supernova Host Confirm No Bias in Hubble-constant Measurements

The Astrophysical Journal Letters
Cycle 1 JWST observations of Cepheids in Type Ia supernova (SN Ia) hosts resolved their red-giant-dominated near-infrared backgrounds, sharply reducing crowding and showing that photometric bias in lower-resolution Hubble Space Telescope (HST) data does ...
Adam G. Riess, Siyang Li, Gagandeep S. Anand, Wenlong Yuan, Louise Breuval, Stefano Casertano, Lucas M. Macri, Dan Scolnic, Yukei S. Murakami, Alexei V. Filippenko, Thomas G. Brink   +10 more
doaj   +1 more source