Stars and Stellar Black Holes in the Low-metallicity Galaxy I Zw 18

被引：0

作者：

Heap, Sara R. ^{[1
]}

Hubeny, Ivan ^{[2
]}

Lanz, Thierry M. ^{[3
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA

[3] Observ Cote Azur, F-06304 Nice, France

来源：

RADIATIVE SIGNATURES FROM THE COSMOS | 2019年 / 519卷

关键词：

BLANKETED MODEL ATMOSPHERES; MASS;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

I Zw 18 is a star-forming dwarf galaxy having a very low metal content, O/H similar to 1/50 solar (Skillman & Kennicutt 1993). While galaxies with such low metallicity are rare in the low-redshift universe, they are likely to be common in galaxies at cosmic dawn. Thus, I Zw 18 is a "living" template for z > 6 galaxies. We have obtained HST/COS far-UV spectra of the northwest star cluster in I Zw 18 and have compared them to SYNSPEC model spectra by Lanz & Hubeny (2003, 2007) in order to determine the properties of the stellar population. We have also compared the observed spectra of I Zw 18-NW to the CLOUDSPEC models (Hubeny et al. 2000) of the stellar cluster with an embedded ultra-luminous X-ray source (ULX). This comparison reveals feedback of the stellar black hole in the form of photoionization and heating. Such models can be used as starting points to explore the physical conditions in which stars and black holes form and evolve in an extremely low-metallicity environment at high redshift.

引用

页码：267 / 272

页数：6

共 50 条

[41] Low-metallicity stellar halo populations as tracers of dark matter haloes
Tissera, Patricia B.
Scannapieco, Cecilia
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2014, 445 (01) : L21 - L25
[42] A comparison of the stars and gas in I Zw 18
Skillman, ED
Palmer, RC
Garnett, DR
Dufour, RJ
FROM STARS TO GALAXIES: THE IMPACT OF STELLAR PHYSICS ON GALAXY EVOLUTION, 1996, 98 : 366 - 367
[43] PHYSICAL CONDITIONS IN A YOUNG, UNREDDENED, LOW-METALLICITY GALAXY AT HIGH REDSHIFT
Erb, Dawn K.
Pettini, Max
Shapley, Alice E.
Steidel, Charles C.
Law, David R.
Reddy, Naveen A.
ASTROPHYSICAL JOURNAL, 2010, 719 (02): : 1168 - 1190
[44] The Leoncino Dwarf Galaxy: Exploring the Low-metallicity End of the Luminosity-Metallicity and Mass-Metallicity Relations
McQuinn, Kristen. B. W.
Berg, Danielle A.
Skillman, Evan D.
Adams, Elizabeth A. K.
Cannon, John M.
Dolphin, Andrew E.
Salzer, John J.
Giovanelli, Riccardo
Haynes, Martha P.
Hirschauer, Alec S.
Janoweicki, Steven
Klapkowski, Myles
Rhode, Katherine L.
ASTROPHYSICAL JOURNAL, 2020, 891 (02):
[45] NEUTRON STARS AND BLACK HOLES IN OUR GALAXY
RUFFINI, R
TRANSACTIONS OF THE NEW YORK ACADEMY OF SCIENCES, 1973, 35 (03): : 196 - 226
[46] NEUTRON STARS AND BLACK HOLES IN OUR GALAXY
RUFFINI, R
BULLETIN OF THE AMERICAN PHYSICAL SOCIETY, 1973, 18 (01): : 109 - 110
[47] Modeling the physical properties in the ISM of the low-metallicity galaxy NGC 4214
Dimaratos, A.
Cormier, D.
Bigiel, F.
Madden, S. C.
ASTRONOMY & ASTROPHYSICS, 2015, 580
[48] NOEMA Observations of a Molecular Cloud in the Low-metallicity Galaxy Kiso 5639
Elmegreen, Bruce G.
Herrera, Cinthya
Rubio, Monica
Elmegreen, Debra Meloy
Sanchez Almeida, Jorge
Munoz-Tunon, Casiana
Olmo-Garcia, Amanda
ASTROPHYSICAL JOURNAL LETTERS, 2018, 859 (02)
[49] The Herschel Dwarf Galaxy Survey I. Properties of the low-metallicity ISM from PACS spectroscopy
Cormier, D.
Madden, S. C.
Lebouteiller, V.
Abel, N.
Hony, S.
Galliano, F.
Remy-Ruyer, A.
Bigiel, F.
Baes, M.
Boselli, A.
Chevance, M.
Cooray, A.
De Looze, I.
Doublier, V.
Galametz, M.
Hughes, T.
Karczewski, O. L.
Lee, M-Y
Lu, N.
Spinoglio, L.
ASTRONOMY & ASTROPHYSICS, 2015, 578
[50] ULX contribution to stellar feedback: an intermediate-mass black hole candidate and the population of ULXs in the low-metallicity starburst galaxy ESO338-4
Oskinova, L. M.
Bik, A.
Mas-Hesse, J. M.
Hayes, M.
Adamo, A.
Ostlin, G.
Furst, F.
Oti-Floranes, H.
ASTRONOMY & ASTROPHYSICS, 2019, 627

← 1 2 3 4 5 →