Zobrazeno 1 - 10
of 753
pro vyhledávání: '"Caldwell, N"'
In the absence of a parallax distance to a pulsar or a surviving binary in a supernova remnant (SNR), distances to Galactic SNRs are generally very uncertain. However, by combining Gaia data with wide field, multi-fiber echelle spectroscopy, it is no
Externí odkaz:
http://arxiv.org/abs/2403.13892
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
Autor:
Hughes, A. K., Sand, D. J., Seth, A., Strader, J., Lidman, C., Voggel, K., Dumont, A., Crnojević, D., Mateo, M., Caldwell, N., Forbes, D. A., Pearson, S., Guhathakurta, P., Toloba, E.
We present new radial velocity measurements from the Magellan and the Anglo-Australian Telescopes for 174 previously known and 122 newly confirmed globular clusters (GCs) around NGC 5128, the nearest accessible massive early-type galaxy at D=3.8 Mpc.
Externí odkaz:
http://arxiv.org/abs/2208.08997
Autor:
Bellazzini, M., Magrini, L., Jones, M. G., Sand, D. J., Beccari, G., Cresci, G., Spekkens, K., Karunakaran, A., Adams, E. A. K., Zaritsky, D., Battaglia, G., Seth, A., Cannon, J. M., Fuson, J., Inoue, J. L., Mutlu-Pakdil, B., Guhathakurta, P., Munoz, R., Bennet, P., Crnojevic, D., Caldwell, N., Strader, J., Toloba, E.
We use panoramic optical spectroscopy obtained with MUSE@VLT to investigate the nature of five candidate extremely isolated low-mass star forming regions (Blue Candidates, BCs hereafter) toward the Virgo cluster of galaxies. Four of the five (BC1, BC
Externí odkaz:
http://arxiv.org/abs/2206.13971
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
We present new kinematic data for the Ophiuchus stellar stream. Spectra have been taken of member candidates at the MMT telescope using Hectospec, Hectochelle and Binospec, which provide more than 1800 new velocities. Combined with proper motion meas
Externí odkaz:
http://arxiv.org/abs/2004.14350
Autor:
Crnojević, D., Sand, D. J., Bennet, P. N., Pasetto, S., Spekkens, K., Caldwell, N., Guhathakurta, P., McLeod, B., Seth, A., Simon, J. D., Strader, J., Toloba, E.
The Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS) is constructing a wide-field map of the resolved stellar populations in the extended halos of these two nearby, prominent galaxies. We present new Magellan/Megacam imaging of a $\sim3$ d
Externí odkaz:
http://arxiv.org/abs/1809.05103
Autor:
Crnojević, D., Sand, D. J., Spekkens, K., Caldwell, N., Guhathakurta, P., McLeod, B., Seth, A., Simon, J., Strader, J., Toloba, E.
We present the widest-field resolved stellar map to date of the closest ($D\sim3.8$ Mpc) massive elliptical galaxy NGC 5128 (Centaurus A; Cen A), extending out to a projected galactocentric radius of $\sim150$ kpc. The dataset is part of our ongoing
Externí odkaz:
http://arxiv.org/abs/1512.05366
Autor:
Crnojević, D., Sand, D. J., Caldwell, N., Guhathakurta, P., McLeod, B., Seth, A., Simon, J. D., Strader, J., Toloba, E.
In the wide-field Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS), we investigate the resolved stellar halos of two nearby galaxies (the elliptical Centaurus A and the spiral Sculptor, D $\sim3.7$ Mpc) out to a projected galactocentric ra
Externí odkaz:
http://arxiv.org/abs/1510.03487
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