English
Related papers

Related papers: An Orphan in the "Field of Streams"

200 papers

We report on the detection in Sloan Digital Sky Survey data of a 63 degree-long tidal stream of stars, extending from Ursa Major to Cancer. The stream has no obvious association with the orbit of any known cluster or galaxy. The contrast of…

Astrophysics · Physics 2009-11-11 Carl J. Grillmair , Odysseas Dionatos

The Orphan Stream is one of the most prominent tidal streams in the Galactic halo. Using data on red giants, RR Lyrae, and horizontal branch stars from Gaia and other surveys, we determine the proper motion of the Orphan Stream over a path…

Astrophysics of Galaxies · Physics 2019-04-10 Mark A. Fardal , Roeland P. van der Marel , Sangmo Tony Sohn , Andres del Pino Molina

We report on a 60 degree-long stream of stars, extending from Ursa Major to Sextans, in the Sloan Digital Sky Survey. The stream is approximately 2 degrees wide and is clearly distinct from the northern tidal arm of the Sagittarius dwarf…

Astrophysics · Physics 2009-11-11 C. J. Grillmair

Examining a portion of the northern Sloan Digital Sky Survey (SDSS) footprint, we detect at least three and possibly seven halo debris streams. One of these (PS1-D) was recently detected in the Pan-STARRS1 $3\pi$ survey, and the remaining…

Astrophysics of Galaxies · Physics 2017-01-11 Carl J. Grillmair

We use recent SEGUE spectroscopy and SDSS and SEGUE imaging data to measure the sky position, distance, and radial velocities of stars in the tidal debris stream that is commonly referred to as the "Orphan Stream." We fit orbital parameters…

Astrophysics of Galaxies · Physics 2014-11-20 Heidi Jo Newberg , Benjamin A. Willett , Brian Yanny , Yan Xu

Prominent in the `Field of Streams' -- the Sloan Digital Sky Survey map of substructure in the Galactic halo -- is an `Orphan Stream' without obvious progenitor. In this numerical study, we show a possible connection between the newly found…

Using photometry and proper motions from Gaia Data Release 2, we detect a 50 degree-long stream of about 70 stars extending westward from the halo globular cluster M5. Based on the similarities in distance, proper motions, inferred…

Astrophysics of Galaxies · Physics 2019-11-06 Carl J. Grillmair

Using a shallow, two-color survey carried out with the Dark Energy Camera, we detect the southern, possibly trailing arm of the Orphan Stream. The stream is reliably detected to a declination of $-38^\circ$, bringing the total known length…

Astrophysics of Galaxies · Physics 2015-10-21 Carl J. Grillmair , Lauren Hetherington , Raymond G. Carlberg , Beth Willman

We use astrometry, broad-band photometry and variability information from the Data Release 2 of ESA's Gaia mission (GDR2) to identify members of the Orphan Stream (OS) across the whole sky. The stream is traced above and below the celestial…

We report on the detection in Sloan Digital Sky Survey data of a 45 degree tidal stream of stars, extending from Bootes to Ursa Major, which we associate with the halo globular cluster NGC 5466. Using an optimal contrast, matched filter…

Astrophysics · Physics 2010-11-11 C. J. Grillmair , R. Johnson

We present the results of fitting a flexible stellar stream density model to a collection of thirteen streams around the Milky Way, using photometric data from DES, DECaLS, and Pan-STARRS. We construct density maps for each stream and…

Astrophysics of Galaxies · Physics 2022-06-22 Jeffrey M. Patrick , Sergey E. Koposov , Matthew G. Walker

We detect a tidal stream generated by the globular cluster NGC 3201 extending over ~140 degrees on the sky, using the Gaia DR2 data, with the maximum likelihood method we presented previously to study the M68 tidal stream. Most of the…

Astrophysics of Galaxies · Physics 2021-05-13 C. G. Palau , J. Miralda-Escudé

We report on the detection in Sloan Digital Sky Survey data of at least three, roughly parallel components in a 65 degree-long stellar stream complex previously identified with the Anticenter or Monoceros Ring. The three-stream complex…

Astrophysics · Physics 2009-11-11 C. J. Grillmair

We use N-body simulations to explore the origin and a plausible orbit for the Orphan Stream, one of the faintest substructures discovered so far in the outer halo of our Galaxy. We are able to reproduce its position, velocity and distance…

We report positions, velocities and metallicities of 50 ab-type RR Lyrae (RRab) stars observed in the vicinity of the Orphan stellar stream. Using about 30 RRab stars classified as being likely members of the Orphan stream, we study the…

Recent years have seen the discovery of an ever growing number of stellar debris streams and clouds. These structures are typically detected as extended and often curvilinear overdensities of metal-poor stars that stand out from the…

Astrophysics of Galaxies · Physics 2016-04-06 Carl J. Grillmair , Jeffrey L. Carlin

We consider the possibility that the Galactic neutral hydrogen stream Complex A and the stellar Orphan stream are related, and use this hypothesis to determine possible distances to Complex A and the Orphan stream, and line-of-sight…

Astrophysics · Physics 2010-03-01 Shoko Jin , D. Lynden-Bell

We present evidence for a new Milky Way stellar tidal stream in the direction of the Andromeda and Triangulum (M31 and M33) galaxies. Using a matched-filter technique, we search the Sloan Digital Sky Survey Data Release 8 by creating…

Astrophysics of Galaxies · Physics 2015-06-11 Ana Bonaca , Marla Geha , Nitya Kallivayalil

The main aim of this paper is to report two new detections of tidal debris in the northern stream of the Sagittarius dwarf galaxy located at 45 arcdeg and 55 arcdeg from the center of galaxy. Our observational approach is based on deep…

Astrophysics · Physics 2009-11-10 D. Martinez-Delgado , M. A. Gomez-Flechoso , A. Aparicio , R. Carrera

Tidal streams of globular clusters are ideal tracers of the Galactic gravitational potential. Compared to the few known, complex and diffuse dwarf-galaxy streams, they are kinematically cold, have thin morphologies and are abundant in the…

Astrophysics of Galaxies · Physics 2016-09-07 A. H. W. Küpper , E. Balbinot , A. Bonaca , K. V. Johnston , D. W. Hogg , P. Kroupa , B. X. Santiago
‹ Prev 1 2 3 10 Next ›