Zobrazeno 1 - 10
of 218
pro vyhledávání: '"Willman, B."'
Autor:
Sand, D. J., Seth, A. C., Crnojević, D., Spekkens, K., Strader, J., Adams, E. A. K., Caldwell, N., Guhathakurta, P., Kenney, J., Randall, S., Simon, J. D., Toloba, E., Willman, B.
We analyze the optical counterpart to the ultra-compact high velocity cloud AGC 226067, utilizing imaging taken with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. The color-magnitude diagram of the main body of AGC 226067 revea
Externí odkaz:
http://hdl.handle.net/10150/625170
http://arizona.openrepository.com/arizona/handle/10150/625170
http://arizona.openrepository.com/arizona/handle/10150/625170
We present deep imaging of the most distant dwarf discovered by the Dark Energy Survey, Eridanus II (Eri II). Our Magellan/ Megacam stellar photometry reaches similar to 3 mag deeper than previous work and allows us to confirm the presence of a stell
Externí odkaz:
http://hdl.handle.net/10150/621260
http://arizona.openrepository.com/arizona/handle/10150/621260
http://arizona.openrepository.com/arizona/handle/10150/621260
Autor:
Bennet, P., Sand, D. J., Crnojević, D., Weisz, D. R., Caldwell, N., Guhathakurta, P., Hargis, J. R., Karunakaran, A., Mutlu-Pakdil, B., Olszewski, E., Salzer, J. J., Seth, A. C., Simon, J. D., Spekkens, K., Stark, D. P., Strader, J., Tollerud, E. J., Toloba, E., Willman, B.
We present observations of the dwarf galaxies GALFA Dw3 and GALFA Dw4 with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST). These galaxies were initially discovered as optical counterparts to compact HI clouds in the GALFA s
Externí odkaz:
http://arxiv.org/abs/2101.08270
Autor:
Hargis, Jonathan R., Albers, S., Crnojević, D., Sand, D. J., Weisz, D. R., Carlin, J. L., Spekkens, K., Willman, B., Peter, A. H. G., Grillmair, C. J., Dolphin, A. E.
A census of the satellite population around dwarf galaxy primary hosts in environments outside the Local Group is essential to understanding $\Lambda$CDM galaxy formation and evolution on the smallest scales. We present deep optical Hubble Space Tele
Externí odkaz:
http://arxiv.org/abs/1907.07185
Autor:
Hargis, Jonathan R., Kimmig, B., Willman, B., Caldwell, N., Walker, M. G., Strader, J., Sand, D. J., Grillmair, C. J., Yoon, J. H.
The Eastern Banded Structure (EBS) and Hydra~I halo overdensity are very nearby (d $\sim$ 10 kpc) objects discovered in SDSS data. Previous studies of the region have shown that EBS and Hydra I are spatially coincident, cold structures at the same di
Externí odkaz:
http://arxiv.org/abs/1509.06391
Autor:
Sand, D. J., Spekkens, K., Crnojević, D., Hargis, J. R., Willman, B., Strader, J., Grillmair, C. J.
We report the discovery of Antlia B, a faint dwarf galaxy at a projected distance of $\sim$72 kpc from NGC 3109 ($M_{V}$$\sim$$-$15 mag), the primary galaxy of the NGC 3109 dwarf association at the edge of the Local Group. The tip of the red giant br
Externí odkaz:
http://arxiv.org/abs/1508.01800
Autor:
Sand, D. J., Crnojević, D., Bennet, P., Willman, B., Hargis, J., Strader, J., Olszewski, E., Tollerud, E. J., Simon, J. D., Caldwell, N., Guhathakurta, P., James, B. L., Koposov, S., McLeod, B., Morrell, N., Peacock, M., Salinas, R., Seth, A. C., Stark, D. P., Toloba, E.
We report five Local Volume dwarf galaxies (two of which are presented here for the first time) uncovered during a comprehensive archival search for optical counterparts to ultra-compact high velocity clouds (UCHVCs). The UCHVC population of HI cloud
Externí odkaz:
http://arxiv.org/abs/1503.00720
We present new upper limits on the neutral hydrogen (HI) content within the stellar half-light ellipses of 15 Galactic dwarf spheroidal galaxies (dSphs), derived from pointed observations with the Green Bank Telescope (GBT) as well as Arecibo L-band
Externí odkaz:
http://arxiv.org/abs/1410.0028
Autor:
Jerjen, H., Da Costa, G. S., Willman, B., Tisserand, P., Arimoto, N., Okamoto, S., Mateo, M., Saviane, I., Walsh, S., Geha, M., Jordán, A., Olszewski, E., Walker, M., Zoccali, M., Kroupa, P.
We present deep CMDs for two Subaru Suprime-Cam fields in the Virgo Stellar Stream(VSS)/Virgo Overdensity(VOD) and compare them to a field centred on the highest concentration of Sagittarius (Sgr) Tidal Stream stars in the leading arm, Branch A of th
Externí odkaz:
http://arxiv.org/abs/1303.5489
Autor:
Sand, D. J., Strader, J., Willman, B., Zaritsky, D., McLeod, B., Caldwell, N., Seth, A., Olszewski, E.
We present deep wide-field photometry of three recently discovered faint Milky Way satellites: Leo V, Pisces II, and Canes Venatici II. Our main goals are to study the structure and star formation history of these dwarfs; we also search for signs of
Externí odkaz:
http://arxiv.org/abs/1111.6608